How To Stop A Tent Caterpillar Infestation

How to Get Rid of Tent Caterpillars

Tent caterpillars are the larvae of various moth and butterfly species (mentioned below), which are referred to as a group by their common name. These caterpillars, which are found throughout most of the United States and Canada, reproduce quickly and have the ability to defoliate a significant number of deciduous trees and shrubs in a short period of time. These pests are frequently seen on wayside trees and in abandoned orchards. Aside from defoliation, the larvae build big unattractive webs, or tents, in the crotches of tree limbs, which are difficult to remove.

Despite the fact that tent damage is ugly, infestations of insects seldom endanger the life of trees.


The Eastern Tent Caterpillar (Malacosoma americanum) is a species of caterpillar that may be found east of the Rocky Mountains and north into southern Canada. In their full developed state, caterpillars are sparsely hairy and black in appearance, with a row of pale blue markings on either side of their bodies. They may be distinguished by a white stripe running down the middle of their backs, which helps to identify them. Adults are reddish brown moths that are 1-1/2 inches in length and have two white stripes running diagonally across each forewing.

  1. The Western Tent Caterpillar (Malacosoma californicum) is a pest that may be found in the northern and western regions of the United States as well as in adjacent Canadian territory.
  2. Approximately 1-1/2 inches in length, adult moths are orange-brown in color with two faint yellow lines on the underside of the wings.
  3. Malocsoma disstria is a forest tent caterpillar that may be found across the United States and Canada anywhere hardwoods can be found in the forest.
  4. americanum are similar in appearance to the adult, but instead of a solid line running down their back, they have a series of keyhole-shaped white dots.
  5. Wild cherry, aspen, maple, oak, and hawthorn are among the plants that serve as hosts.
  6. Webworms are known to feed on over 85 different types of trees and are found across North America and Mexico.
  7. One-inch-long caterpillars are coated with long hairs and range in color from yellow to green, with a black stripe along the back and a yellow stripe on each side of the body.

The color of their heads is either red or black. Adult moths (1 inch in length) are pure white in color with black markings on the wings, which are characteristic of the species.

Life Cycle

The egg stage is where the majority of tent caterpillar species overwinter. Egg masses ranging in color from dark brown to gray and holding 150 to 400 eggs are adhered to the short twigs of trees and bushes. Hatching takes occur around the time when leaf buds begin to open, which is normally in the early spring months. They are social creatures who quickly build silken tents, which they use as a haven during the early morning and evening hours, as well as during rainy spells, to protect themselves from the elements.

The larvae reach full maturity around six weeks after hatching and five instars following that time period (up to 2 inches long, sparsely hairy).

Adult moths emerge around two weeks later and deposit the overwintering eggs within a short period of time.

Note: When larvae begin to travel to sheltered regions in order to pupate, they can become a nuisance.

How to Control

  1. Prevent the larvae from starting to eat by scraping off and discarding overwintering egg masses and tearing the protective tents out by hand before they start to feed. With this method, you may restrict caterpillar mobility and deny them access to eating locations. Sticky Tree Bands or Tree Tanglefoot Pest Barrier are two options for preventing pest infestations. The naturally occurring soil-dwelling bacteriumBacillus thuringiensis, often known as Bt-kurstaki, is highly powerful against all species of inch worms. At the first indication of damage, use a spray that is simple to apply to knock out the worms and safeguard the foliage. It is safe to use BTKsprays near dogs and children since they do not damage honey bees or birds
  2. Spinosad, a biological substance developed from fermentation, is also extremely useful in a variety of applications. In fact, it’s the active ingredient in Monterey Garden Insect Spray, a product that has been classified as organic by the United States Department of Agriculture’s National Organic Program and listed for organic use by the Organic Materials Review Institute
  3. AzaMaxcontains azadirachtin, which is the key insecticidal ingredient found in neem oil. This very powerful spray interferes with the growth and development of nuisance insects while also acting as a repellant and anti-feedant. In addition to being non-toxic to honey bees and many other helpful insects, it should only be used as a last resort for dealing with bug infestations. Natural pesticides, which are derived from plants that contain insecticidal qualities, have less adverse side effects than synthetic chemicals and degrade more quickly in the environment.

Note: Although more than 80 species of predators and parasites have been identified in the United States, none of them are now available for purchase on the market. During the majority of the year, these insects serve a crucial role in keeping pest populations under control. As a result, extreme caution must be exercised while spraying pesticides in order to avoid causing harm to these important species.

Tent Caterpillars – How do I get rid of tent caterpillars?

Wizzie Brown contributed to this article. Tent caterpillars attack a variety of broadleaf trees and shrubs, causing unattractive webs, or tents, to appear on the leaves. When their populations reach a critical mass, the caterpillars can defoliate trees, causing them to develop more slowly. They prey on ornamental and fruit trees, among other things. Early and correct identification of tent caterpillars, knowing their life cycle, and the use of suitable cultural or chemical management strategies are all essential for their eradication from the environment.

The eastern tent caterpillar, Malacosoma americanum, is the most troublesome of the four.

Life Cycle

Female moths lay their egg masses on tree trunks or tiny twigs throughout the late spring to early summer period (Fig. 1). The females of all Texas species, with the exception of the Sonoran tent caterpillar, utilize spumaline, a sticky, foamy substance, to “glue” the eggs to the bark or twigs of trees and shrubs. The spumaline also functions as a protective shell surrounding the egg mass, providing a firm, durable surface. During the majority of the summer, fall, and winter, egg masses linger on the branches of the trees.

  1. Eastern and western tent caterpillars begin feeding on these fresh leaves within a few days of their appearance.
  2. In most cases, the web is situated in the crotch of tiny limbs (Fig.
  3. Because the larvae wander away from their tents to feed on leaves, harm can occur even if the web is located a long distance away from the tents.
  4. These enormous, noticeable webs are created by the eastern and western tent caterpillars.
  5. The larvae molt, or lose their skin, multiple times throughout their development.
  6. The color pattern can also alter from instar to instar depending on the species.
  7. 3).
  8. Between feedings, dozens of caterpillars may assemble on these mats to wait for their next meal.
  9. Protected areas like as the web, under the bark, among dead plant material on the ground, within a curled leaf, or under the eaves of homes are all common locations for spiders to hide.
  10. Generally speaking, cocoons are loosely made of silk with a white or yellowish crystalline component dispersed throughout the whole thing.
  11. Tent caterpillars in their adult form are brown and yellowish moths with two diagonal patterns on the front wings of their bodies (Fig.

4). Their wingspans are around 1 inch in length. They are drawn to lights, like do other moths. A single generation of tent caterpillars occurs once a year in all species. Adults only survive for a few days, during which time they mate, lay eggs, and do not consume any food.


Tent caterpillars in its infancy are brightly colored and grow to be approximately 134 inches long when fully grown. The only lengthy hairs on their body are found around the sides and on the back. Individual species may be distinguished by the colors and patterns on their larvae. If you come across tents with larvae that do not fit the descriptions in Table 1, it is most likely that they are autumn webworm tents. Fall webworms may construct tents throughout the late summer and fall and can have numerous generations per year, depending on the species.


The degree of defoliation, unattractive webs, and nuisance caused by the caterpillars should be taken into consideration when developing a management strategy. It is possible that you may need to utilize a combination of cultural and chemical procedures to achieve the optimum results. Control over one’s culture. During winter pruning, look for egg masses, which show as swellings on tiny, naked branches and are a sign of infestation. When trees are pruned, the tent caterpillar eggs are frequently removed before they develop.

  • When you discover spider webs on twigs in the spring, prune them as soon as you notice them.
  • It is not suggested to burn the web or caterpillars since it is quite dangerous.
  • Remove the dead caterpillars from the ground and dispose of them.
  • Beneficial insects can help to lower the number of tent caterpillars.
  • Trichogramma species prey on the eggs of tent caterpillars.
  • Control through chemical means.
  • The use of insecticide is pointless if the tent caterpillars have been allowed to feed and develop to completion.

Tents are weather-resistant and will remain in the tree for an extended period of time until they are removed.

Early morning or late evening applications are recommended in order to concentrate the spray on the tents when the caterpillars cluster.

The species that may be sprayed with these oils will be listed on the label of the product.

Some organically generated goods contain active substances such as Bacillus thuringiensis (Bt)varietykurstaki, spinosad, or insecticidal soap, which are all derived from bacteria.

In order for the Bt kurstaki and spinosad to be taken up and consumed by the caterpillars, spray the plant well before applying the substance to the leaves.

Contact-kill insecticides such as insecticidal soap must be applied directly to the caterpillars in order for them to be killed.

Some of these formulations operate when they come into direct contact with the pest, while others may have an oil-based component that is comparable to horticultural (petroleum-based) oils in their composition.

There are several long-lasting, synthetic pesticide solutions available that give quicker and longer-lasting control than most plant-derived insecticides while also working on all phases of the caterpillar’s life cycle.

Bifenthrin, cyfluthrin, esfenvalerate, fluvalinate, permethrin, lambda-cyhalothrin, indoxacarb, acephate, and carbaryl are all active chemicals to search for in a pesticide formulation.

Pesticide users are accountable for the impact pesticides have on their own plants or home goods, as well as any difficulties that may arise as a result of pesticide drift from their own properties to the properties or plants of their neighbors.

Also prone to change are the regulations governing the use of insecticides and pesticides. Always read and carefully follow the instructions on the product label for the most dependable instructions.


The author would like to express his gratitude to Bart Drees, Glen Moore, and Kim Schofield for their contributions to the review of this article. Bart Drees provided all of the photographs. Download a printer-friendly version of this publication by clicking on the following link: Caterpillars of the Tent »See more details about Gardening and Landscaping» Do you have a question – or do you require the assistance of an expert? Make contact with the appropriate county office.

How Do I Stop Tent Caterpillars from Damaging My Trees?

During the early spring, eastern tent caterpillars (Malacosoma americanum) construct unattractive silk tents on the leaves of cherry, apple, and other landscape trees. The caterpillars feed on the leaves of these host trees and, if present in great numbers, can cause substantial defoliation of the plants. They may also be a nuisance since, when they’re ready to pupate, they prefer to wander around and make themselves at home on porches and decks.

Make Sure You’ve Really Got Tent Caterpillars

First and first, be certain that you are dealing with easterntent caterpillars and not another similar insect. During the early spring season, eastern tent caterpillars arrive and begin to construct their tents in the crotches of tree limbs. Fall webworms, as their name indicates, also construct tents, but theirs are positioned at the extremities of branches, forming an envelope around the foliage around which they are feeding. Occasionally, people confuse eastern tent caterpillars with gypsy moth larvae; however, gypsy moths do not create tents, and their larvae appear a bit later in the spring than tent caterpillars do.

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Prevention and Manual Controls for Tent Caterpillars

It is not necessary to be alarmed if you notice a few caterpillar tents in an apple or cherry tree. Eastern tent caterpillars seldom infest ornamental trees in big enough numbers to cause damage to landscaping plants, according to the University of Florida. Because they appear in the early spring and finish their life cycle by the summer, the majority of your host trees will have enough time to develop more leaves after the initial defoliation occurs. There are some things you can do to discourage the invasion of caterpillar tents in your trees if the infestation isn’t too bad.

  • When it comes to preventing tent caterpillars, the greatest defense is often a well-planned offensive.
  • Remove any that you come across by pruning them out or scraping them off the branches and destroying them.
  • Tent caterpillars spend the majority of their time inside their tents after they feed, making it possible to hand remove them.
  • You may use a stick or gloved hands to pull the tent away from the branches, caterpillars and all.

Alternatively, you may smash the caterpillars or dump them in a basin of soapy water to get rid of them. Caterpillar tents were once frequently set on fire by unscrupulous individuals. Due to the fact that the method does more damage to the tree than the caterpillars, it is not advised.

Biological and Chemical Controls for Tent Caterpillars

Young larvae can be treated with Bacillus thuringiensis var kurstaki, also known as Bt, which is applied to the foliage of infested trees to kill the pest. Bt is a naturally occurring kind of bacterium that interferes with the caterpillars’ ability to digest their food, causing them to die. The caterpillars cease feeding immediately after ingesting Bt, and they die within a few days of doing so. It is not necessary to treat the tents or the caterpillars with insecticide. Ineffective treatment with Bt is available for late-stage caterpillars, particularly those that have already begun their migration to pupate.

If you believe the infestation is severe enough to necessitate such drastic measures, consult with a pest control specialist in your area to ensure the safety of your pets and wildlife during the process.

How to Get Rid of Eastern Tent Caterpillars

When sprayed to the leaves of infected trees, Bacillus thuringiensis var. kurstaki, sometimes known as Bt, can be used to treat young larvae. Caterpillars’ capacity to digest food is hampered by Bt bacteria, which is a naturally occurring kind of bacterium. Ingestion of Bt causes caterpillars to quickly cease feeding and die within a few days of exposure to the pesticide. The tents and caterpillars do not require any spraying or treatment. Ineffective treatment with Bt is available for late-stage caterpillars, particularly those that have begun their migration to pupate.

Please consult with a pest control professional in your region if you believe the infestation is severe enough to necessitate such serious measures.

Eastern Tent Caterpillars

Eastern tent caterpillars may be found in abundance throughout the eastern United States and the Rocky Mountains. Infestations of this species can inflict considerable harm to the look of ornamental trees, and their populations fluctuate from year to year. Soon after hatching, the caterpillars crawl up into the bends of trees where they construct webs to keep themselves warm. These parasites can be found in a range of common host trees. Eastern tent caterpillars have a hairy black body with yellow stripes and oval-shaped blue spots down the sides, and they are a kind of moth.

Gypsy moths, on the other hand, do not have this stripe.

Western Tent Caterpillars

West-coast tent caterpillars are more frequent in the Northwest, although western tent caterpillars may also be found on particular host trees in the southern Rocky Mountains, where they are known as forest tent caterpillars. The two are roughly the same size, but they differ in a number of significant ways. The tent caterpillars of the western hemisphere are orange with black patterns that run down their backs.

As soon as their eggs hatch in the spring, their “tents” begin to emerge. Trees are beginning to blossom at this time, and these pests begin feasting on new growth as soon as they emerge from their eggs. They can be found on a number of host trees, including the following:

Forest Tent Caterpillars

Caterpillars that live in forest tents are distinctive in appearance. It is easy to distinguish them by their blue hue with black specks and the white marks in the shape of feet in the center of their backs, which are in the middle of their backs. Similarly to spider webs, these are silken mats that are placed between tree branches, and they are not regarded to be “tents.” Some examples of host plants are as follows:

Other Insects That Are Mistaken for Tent Caterpillars

There are several different sorts of moths and insects that are often mistaken for tent caterpillars, including lacewings and aphids. They have a variety of consequences for your property.

Gypsy Moths

Gypsy moth caterpillars are distinct from tent caterpillars, which implies that gypsy moth caterpillar control methods will differ slightly from tent caterpillar control methods. Gypsy moths don’t come in the spring, but rather later in the year, when the weather warms up. An entirely new generation arises each year, and they harm a wide variety of ornamental shrubs, conifers, and trees. They can also be seen on fruit trees and shrubs.

Fall Webworms

If you hear someone mention tent worms, it’s possible that they’re referring about autumn webworms instead. Although they are not tent caterpillars, the terms “tent caterpillar” and “tent caterpillar” are sometimes used interchangeably. Fall webworms are distinguished from eastern tent caterpillars by their appearance and behavior. They are creamy-white, hairy, and speckled with black spots, but eastern tent caterpillars are not. Their webs are spun over the tops of branches and leaves, and they also eat within their webs, as opposed to tent caterpillars, which only utilize their tents for protection.

Tent Caterpillar Lifecycle and Control

Knowing the pest’s lifecycle is essential when dealing with tent caterpillars or removing a caterpillar infestation from your property. During the early spring, eastern tent caterpillars make their initial appearance and finish their lifecycle by the end of the summer. This implies that host trees have more time to produce new foliage and are less likely to perish as a result of an infestation. They can, however, do damage to the beauty and health of a tree. During the months of January through March, eastern tent caterpillars deposit their eggs in host trees.

  • Adult moths begin producing new batches of eggs in the summer and continue to do so through the fall and into the early winter months.
  • Safer®Brand Caterpillar eggs are killed by BioNEEM®, a neem oil concentration that is used to kill the eggs of a range of insect pests, including caterpillars.
  • It is azadirachtin that is found in BioNEEM®, which is a naturally occurring Insect Growth Regulator that has been isolated from the neem seed.
  • This product is a means of removing caterpillar infestations from a structure.

Caterpillar Killer includes Bacillus thuringiensisvar.kurstaki, a naturally occurring chemical that is non-toxic to humans, birds, and other wildlife. Caterpillars, on the other hand, are killed within a few days of exposure. This product is particularly well suited for:

  • Forest tent caterpillar control, Western tent caterpillar control, Eastern tent caterpillar control, Fall webworm control, Gypsy moth control are all examples of pest control. Caterpillar control in a green step

Pruning and the introduction of natural predators are two more techniques of removing tent caterpillars from a structure. The natural enemies of caterpillars include birds and wasps, among others. Predators pluck these bugs out of trees and consume them because they are poisonous. As an alternative, if the caterpillars’ tents are within reach, you might consider cutting off the afflicted branches and burning them to get rid of tent caterpillars completely.

How to Identify and Control Tent Caterpillars

No other insect strikes horror into my heart quite like a squirming, crawling mass of tent caterpillars. Call me theatrical, but there isn’t another bug that can do that to me. It’s not because of the harm they inflict to plants, but rather because their nests appear like something out of a horror film, which is understandable. Isn’t it true that a single caterpillar is kind of adorable? Some of them even have marks that resemble a smiley face on their faces. But when you’re in a bunch. yuck!

  1. If you make a purchase after clicking on one of our links, we may receive a commission.
  2. A significant infestation can result in swarms of them creeping down the road and sidewalks at the same time.
  3. ‘Ugh!’ I say again.
  4. In spite of the fact that I am totally disgusted by them – surprise!
  5. I’m also going to make a case for why you should, at the very least, leave them alone in this situation.

What Are Tent Caterpillars?

The phrase “tent caterpillar” refers to the larvae of all species of moths belonging to the genus Malacosoma, which includes all forms of tent caterpillars. There are around 26 species worldwide, with six of those found in the United States. One thing that they all have in common is that during the spring, the caterpillars build big communal nests on trees out of silken threads, which are then consumed by the birds. Some make a type of “home base” that they leave and return to throughout the day, and others build tents continually as they walk around the tree’s circumference at night.

  • californicum, also known as the Western tent caterpillar, M.
  • disstria, also known as the forest tent caterpillar, are the most prevalent in the United States.
  • californicum is a species of fungus that may be found in the western United States, southwestern Canada, and northern Mexico.
  • The majority of the time, they have dark blue or black heads, and their bodies are green, black, orange, or blue, or a combination of these hues, with fine hairs (setae) covering their bodies in general.
  • They can grow to be up to two inches in length.
  • M.
  • The larvae are black with a white dorsal stripe and blue specks on the back, and they are coated in small reddish hairs on the rest of their bodies.

Fruit trees such as cherry, peach, and plum, as well as witch hazel and hardwoods such as ash, birch, hawthorn, maple, oak, and willow, are among the trees that these caterpillars like.

disstriais may be found all throughout the continental United States and southern Canada.

They have delicate, light hairs covering their bodies.

In contrast to the other two species listed above, this species does not establish a home base tent that it uses to keep close to.

They may also tie up leaves with silk to construct small protected pods, which they may then eat.

tigris), which may be found in the western United States, and the Southwest tent caterpillar (M.

Tent caterpillars are all fuzzy rather than smooth, and they do not have the big tufts of hair at either end of their bodies as some other caterpillars do.

Because they all look different and there isn’t a defining physical characteristic that distinguishes them from other caterpillars, it’s easiest to identify tent caterpillars in general by the characteristic tents they make and the damage they cause to trees, rather than by their specific appearance or physical characteristics.

  • In the spring, the nests are tiny and compact to begin with.
  • They are likewise creamy white in the beginning of the season, but as they full with feces, their color progressively darkens to a brown shade.
  • As they crawl up the branches of the trees, these parasites consume a lot of vegetation, which they chew up as they go.
  • The caterpillars, as they travel around the tree, leave a silken string in their wake, which is quite interesting to observe.
  • However, if the caterpillar descends a branch that does not have much food on it, the caterpillar will cut the thread, preventing subsequent caterpillars from wasting their time searching for food there.
  • They’re true team players, you know!
  • Webworms (Hyphantria cunea) are sometimes lumped together with tent caterpillars, however they are two completely separate insects.
  • In addition, webworms are more active in the summer and fall than they are in the spring.

Lymantria dispar dispar is the gypsy moth. These areLymantria dispar dispar, which is a distinct species of moth from a different genus entirely.

Biology and Life Cycle

This pest reproduces just once a year, and it has only one generation every year (thank goodness). The eggs are placed in large clusters around branches throughout the summer months and are held in place by a sticky material that the birds produce called spumaline. The masses have a brown tinge to them, and the eggs are left in place on the tree so that they can overwinter there. The caterpillars emerge from their eggs in the spring and cluster on a tree to build a communal nest, where they spend the evenings and inclement weather before emerging to feast on the foliage.

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As the caterpillars increase in size, they begin to munch on the leaves of trees, eventually defoliating the entire tree when in big enough numbers.

The moths emerge from their cocoons a few weeks after they have formed them in order to mate.

Adult moths do not consume any food at all.

Organic Control Methods

Many specialists now advise simply letting these wigglers alone, as they have in the past. An infestation will not harm a tree unless the tree is already stressed by disease or other environmental stresses such as drought, in which case it will die. Even if the caterpillars fully defoliate a tree, the tree should be able to recover once the pests have fled the scene. Furthermore, these insects are a vital component of the natural ecosystem, and they are preyed upon by a variety of natural predators.

  • Having said that, there are a few reasons why you’ll want to get rid of these pesky insects.
  • This is due to the fact that defoliation might cause the tree’s development or productivity to be stunted for the duration of the growing season.
  • They are also the pests that you will most likely want to control or eradicate because they prey on trees that are economically valuable.
  • Second, trees that are already stressed due to drought, disease, or other pests may not be able to endure an infestation of the pests mentioned above.
  • If you have horses, you have still another incentive to bring an infestation under control.
  • They subsequently spread throughout their bodies, puncturing the intestinal wall and transporting inside bacteria to areas where it shouldn’t be.
  • Horses that are not pregnant might also ingest the insects and have eye or heart problems as a result.

If you, your kid, or your pet ingests the insects, keep in mind that the fine hairs on their bodies have been observed to irritate the skin of certain individuals.

Finally, if they are simply giving you the heebie-jeebies, you may choose to have them taken away.

Their frass, commonly known as excrement, is a valuable source of fertilizer.

After being defoliated, the majority of trees grow back with more leaves than they had before.

So, despite the fact that I feel goosebumps just thinking about them, I choose to allow them to be in my yard — a purposeful tactic known as “tolerance” in scientific circles.

Final point: if you don’t find the nests until the beginning of summer, there is no need to destroy them in order to attempt and manage the pest population.

The caterpillars are already fully adult at that stage, and they will be going on in the near future. However, if you do not like the appearance of the spider webs, you are welcome to brush them away.

Physical Control

The most effective way to get a handle on these pests is to physically remove them from your home. There are a variety of approaches that may be used to accomplish this. Trim away the branches that are most highly infected, as long as the nest is not in a major branch or on a portion of the tree’s trunk. Additionally, you may use a broom to sweep out the nests and place them on a sheet before bagging and disposing of the bugs. Performing the sweeping and pruning at night, early in the morning, or after a rainfall will ensure that you are eliminating all of the caterpillars that are resting or seeking shelter, rather than simply the caterpillar nest itself.

Their flames will spread throughout the tree as they separate themselves from the trunk and become blazing flags flying in the breeze.

During the winter, prune out or remove any egg masses that have formed by scraping them off with a knife.

Biological Control

A large number of natural enemies attack these caterpillars. Put them to work for you to assist you in keeping an infestation under control. Apart from attracting bird visitors, you may also attract ladybugs, tachinid flies, and parasitic wasps to your garden by planting them in the Hyposter, Cotesia, and Bracongenera, as well as the Edovum puttleri. Spiders, stink bugs, army bugs, paper wasps, assassin bugs, and lacewings are some of the predators that prey on these insects. Predatory insects are available for purchase and introduction into your garden if you do not already have a large number of them.

Bacillus thuringiensiskurstaki (Btk) is efficient against little caterpillars under an inch in length, but it becomes less effective as the caterpillars grow in size.

Organic Pesticides

Preventing a caterpillar infestation from forming in the first place can be accomplished by spraying the egg masses with a dormant oil during the winter months. The eggs will be smothered as a result of this. Because the timing of application and the suggested amount vary depending on the plant, it is important to precisely follow the manufacturer’s instructions. Spinosad is a very powerful pesticide that has the extra virtue of not being toxic to the vast majority of beneficial insects on the planet.

Monterey Garden Insect Spray is a product manufactured by Monterey Garden Insect Spray.

For the last organic pesticide, insecticidal soap can be effective, but it must come into direct contact with the larvae in order to be effective.

Ensure that you follow the manufacturer’s recommendations for the exact type of tree you are spraying. Bonide Insecticidal Soap is a natural insecticide. In 12- and 32-ounce containers, Bonide offers a nice ready-to-use choice that can be purchased through Arbico Organics for a reasonable price.

Chemical Pesticide Control

We do not advocate using chemical pesticides to manage tent caterpillars since they are not a pest that normally causes catastrophic losses and because there are no insecticides that are especially aimed at tent caterpillars available. It is possible that doing so would harm the other beneficial insects in your garden, which will have long-term implications for the environment. You should also use great caution when eradicating any native insect populations, since doing so may have unforeseen and long-term consequences for the environment.

How To Get Rid Of Tent Caterpillars

This post may contain affiliate links; please see my full disclosure policy for more information. Because I am an Amazon Associate, I receive money when people make eligible purchases. You’ve come to this location because tent caterpillars are devouring your trees, correct? No surprise that caterpillars are a major issue for trees, and especially fruit trees, in the United States. A huge nest of tent caterpillars may quickly defoliate your trees, but don’t worry, I have a really simple method for killing the caterpillars in your trees that takes just ONE simple thing that you probably already have in your house right now.

  1. Healthy trees will simply regrow a new set of leaves when they are damaged.
  2. However, if your trees are young, the stress of losing their leaves might cause them to develop more slowly or, in the worst case scenario, cause them to die.
  3. We had a significant infestation of tent caterpillars the first year they started to produce properly, which was really frustrating.
  4. That year, we were unable to harvest our apple crop, and I vowed to myself that this would never happen again.

To control a pest in your garden you need to understand its life-cycle.

Tent caterpillars can be found in all three of the following kinds, depending on your geographic location. Despite the fact that they seem different from one another, they both cause the same sort of damage to your trees. Contrary to the fall webworm, which may be spotted in trees throughout the late summer and early fall, these are not the same thing.

Eastern Tent Caterpillars

In color, the Eastern Tent Caterpillars are mostly black, with a white stripe running down the middle of their back and a row of bright blue dots on either side of their body.

Cherry, apple, and crabapple trees are among their favorite food sources, although they will also consume other types of trees such as shade trees.

Western Tent Caterpillars

The Western Tent Caterpillar is a yellowish-brown caterpillar with a series of blue and orange dots running down its back. They eat fruit from trees such as cherry, apple, plum, willow, birch, poplar, and oak.

Forest Tent Caterpillars

The Forest Tent Caterpillar has a similar appearance to the Eastern Tent Caterpillar in terms of coloration. They are black with white keyhole-shaped markings running down the rear of their bodies. Unlike other tent caterpillars, which build nests in the forks of trees, these caterpillars form a silk mat along the surface of the branches they feed on. Tent caterpillars are one of the most gregarious forms of caterpillars, and they are members of the moth family Lasiocampidae. The eastern tent caterpillar is the most common variation seen in our region, and it is the most common variety in the world.

  1. These eggs develop swiftly, and by three weeks, the caterpillars will have fully developed into butterflies.
  2. Their hatching is timed to coincide with the regrowth of the trees’ leaves.
  3. These are initially extremely little, but as the caterpillars develop in size, they become bigger.
  4. Look very closely at the forks of the tree branches, since this is where they prefer to make their nests.
  5. Typically, this occurs soon before sunrise, throughout the middle of the day, and shortly after sunset.
  6. They then return to their nest once they have done feasting.
  7. In the final stage of the caterpillar’s existence, they separate from one another in order to select a suitable location for forming their individual cocoon.
  8. They are nocturnal, and you have most certainly seen these medium-sized brown moths fluttering around in the dark throughout the night.
  9. Because you now understand the tent caterpillar’s life cycle, it will be much easier to maintain control.

How To Kill Tent Caterpillars In Your Trees

Tent caterpillar nests are frequently destroyed by burning them with a tiny propane torch, which is highly effective. This is the method I learnt as a child, and I’ve witnessed many others use it to eliminate caterpillar nests. However, there are several drawbacks to this approach.

  1. Caution should be exercised while burning caterpillar nests since it may cause harm to your tree and leave huge, unsightly black patches behind. This is something I’ve done in the past, and it is quite unsightly! It is possible to get around this by cutting the branch after it has been burnt. However, this causes further harm to the tree, and what if your nest is located at a high point in the tree or on a huge branch? You really don’t want to inflict any serious damage to your trees, do you? Indeed, isn’t that what you’re attempting to protect them from in the first place
  2. When the weather is windy, it might also be difficult to burn the nest with a torch since little torches are readily blown out of their holders. If the nest is located at a high point in your tree, going up to it or using a ladder is not the safest option when using a torch

So the really easy way that we came up with for killing tent caterpillars is simplyvegetable oil!

It’s really that straightforward! The understanding of the caterpillar’s life cycle is essential to make this work. You must wait until all of the caterpillars are in the nest at the same time before spraying the nest well with vegetable oil. Because insects breathe via their skin, this method is effective. When they are covered with oil, they are unable to breathe and die within minutes. However, because I’m a frugal person, I keep the wasted oil from our deep fryer, which I then use in this recipe.

I really like the heavy-duty spray bottles that I’ve been using.

I frequently use them not just to make an oil spray for caterpillars, but also to apply combinations of tea tree oil or liquid fertilizers as a foliar spray on the leaves of plants.

The Benefits Of Using Vegetable Oil

  1. It kills the caterpillars swiftly and does not leave any unsightly black patches on the leaves of your plants. If left to its own devices, the nest will disintegrate and collapse in a short period of time. It is also lot simpler to spray the oil on the nest that is higher up in your tree than it is to attempt to burn them with a torch.
See also:  What Is A Portable Garden Tent

Would you like to see just how well this works?

Watch my video to see how simple it is to use this approach of controlling caterpillars in my fruit trees in your own yard. Isn’t it great when you can find simple and safe techniques to keep pests under control in your garden?

Other Ways To Control Tent Caterpillars

While spraying the nests with vegetable oil is my preferred method of controlling these pests, it is no longer effective once they have outgrown the communal nest. However, there are still simple ways to get rid of tent caterpillars on your trees and in your yard. Read on for more information.

How To Get Rid Of Tent Caterpillars With Dish Soap

Another quick and simple method for getting rid of caterpillars is to spray them with dish detergent. The key to making a dish soap spray effective is to avoid allowing the soap to froth excessively. Fill the spray container almost to the brim with water, then add 1-2 teaspoons of dish soap per gallon of water and shake well. After that, finish topping off the water supply. Give the sprayer a slight shake to ensure that all of the soap is included. This helps to keep the soap suspended in the water rather than having it float to the surface as bubbles.

Use BTK Spray

The best alternative if your trees are being devoured by tent caterpillars but you can’t discover a nest to remove is to use an organic BTK (Bacillus thuringiensis) spray, which is safe and effective. This naturally occurring bacterium is only harmful to caterpillars, and it is completely safe to use around birds and bees. Simply spray BTK on the leaves of your trees, and the caterpillars will be killed as a result of eating the poison.

Download a tip sheet to help you remember how to spot tent caterpillars in your garden and control them safely!

Do you have a cucumber beetle infestation in your yard or garden? See how I got rid of them in a quick and simple manner! A homeschooling parent of six children, Kim Mills lives on an urban farmstead in the province of Ontario, Canada. She likes blogging at Homestead Acres, where she shares money-saving strategies as well as information on how to cultivate and store your own food.

tent caterpillar control and treatments for the yard home and garden

Tent caterpillars are a very busy pest that may be found throughout the year. They have voracious appetites and will consume nearly any plant they come upon. Their nests are unattractive, their feeding habits are detrimental to plants, and they quickly move inside practically any building, creating a shambles in the process. Tent caterpillars are covered in full in this article, which will also explain how to control local infestations and nests on your property, as well as what products to use.

  1. These animals are normally dark in appearance — primarily black – with a few lengthy, brightly colored stripes running down their backs.
  2. It is possible that these lines be brown or yellow in color.
  3. Even though they are scarcely detectable at this time, they will become more active when the surrounding plant life begins to produce their spring foliage in the coming months.
  4. In the event that the host tree or shrub on which they originated does not supply sufficient food, the ants will travel to other adjacent native plants for sustenance.
  5. Every evening after dark, the spiders will return to their host tree and begin spinning a “tent” that will continually expand to meet their ever-increasing size.
  6. These tents, which are generally ugly, are white and silky in appearance and arise where the host tree’s limbs grow in two different directions at the same time.
  7. These colonies will begin with several hundred caterpillars, and their “tents” can range in size from as tiny as a soccer ball to as huge as a compact automobile!

All of the tents will have been deserted, and caterpillars will be observed traveling in all directions, with no apparent purpose in mind.

In the course of their journey, they would frequently crawl on top of houses.

Once they have selected a comfortable area where they feel safe and sheltered, they will spin a cocoon and go through the process of transformation.

Females (adult moths) will search for a suitable host plant on which to lay eggs, and after they have located one, they will deposit 200-300 eggs on a branch that is kept together by a sticky material that is produced as part of the egg laying process.

When tent caterpillars feed, they may do a great deal of harm.

Because they will be unable to perform normal photosynthesis without their leaves, they will have to expend a significant amount of time and energy growing new leaves to replace those that have been lost, and as a result, they will be significantly more vulnerable to other problems such as disease and parasites.

Furthermore, caterpillar droppings will be found below host plants and will create a sloppy mess on automobiles, homes, lawn chairs, and other items of furniture.

They may be found beneath any host plant and can become quite a nuisance if the local populace is in high numbers and consuming the droppings.

Their excrement is corrosive, and it will “eat” through almost any type of automotive finish, causing it to deteriorate.

In proportion to the size of each individual caterpillar, the colony will expand the size of their “tent.” Despite the fact that caterpillars begin each season little and scarcely apparent, they will eventually grow to reach more than 2 inches in length, necessitating the expansion of the nest’s “tent” to suit each individual’s increased size.

Don’t be shocked if you come across nests the size of a basketball or even bigger.

From year to year, trees that have been effective in attracting nesting birds will attract additional birds since past generations will automatically recognize a suitable host plant.

In addition, if the damage, droppings, and unsightliness of their nests aren’t enough to establish them as a legitimate annoyance, their yearly migration will undoubtedly do the trick.

They will begin to leave the main nest once the larvae have consumed sufficient food in order to find an appropriate site where they may undergo transformation.

They like to move sites in a safe and discrete manner, and they appear to enjoy man-made structures just as much as they do natural trees while doing so.

During this period, the migrating larva will be out in large numbers, moving in all ways from the main nest, and if they come across a house or other structure, they will almost certainly attempt to make it their home for the next month.

Indeed, if your property is near the tent caterpillars’ migration route, you may find yourself the victim of an invasion each and every year.

Tent caterpillars are a difficult pest to remove, but there are several extremely efficient treatments for them available.

This concentration is essentially a concentrated bacterium in a concentrated form.

It is safe to spray thuricidal solutions on any plant, vegetable, or fruit without creating a concern, and it is an excellent preventative item to use – particularly if you are treating before the pests come.

Every two weeks, go on a retreat.

Another strategy is to place a band of INSECT GLUE around the trunk of any tree that has been identified.

Make the band at least 1 inch wide; a container of Insect adhesive will treat 3-5 big trees if the band is 1 inch wide.

This is a fantastic preventative treatment that will prevent all insects from gaining access to valuable plants in the future.

Organic products recognized and certified for caterpillar control are few, however we have discovered that BT GARDEN DUST andMULTI PURPOSE INSECT KILLER provide the most effective results.

Caterpillars that are fed with BT dust will die within 7-10 days of consuming plants and leaves treated with the dust.

Because of the height of your trees, dusting will not be an option for you.

While used on organic gardens (fruits and vegetables), this fast-acting concentrate is permitted for usage.

Use no more than 800 sq/ft of foliage to apply the mixture, which should include 5 oz per gallon of water.

The use of this concentrate on food crops is not recommended; nonetheless, it is wonderful for any tree, shrub, or even for the home’s landscape.

Bifen treatments can last for up to a month and can effectively eliminate virtually every bug that comes into contact with them on treated surfaces.

Because caterpillars have a lot of hair, you need use SPREADER STICKER in your tank mix.

When spraying plants, it is often difficult to get enough coverage due to the fact that leaves have undersides that are resistant to direct spray.

Furthermore, it will increase the direct effect that Bifen has on the caterpillars that have been targeted.

If you have a large number of nests that you wish to cure immediately, you have two alternatives.

This might be difficult due to the fact that most nests will be located high up the tree and the webbing can be fairly thick.

This will ensure that all caterpillars have returned to the nest and are laying eggs inside of it.

Make three or four holes in their tent using a stick or pole.

Once the access holes have been created, spray the nest with the solution that you have prepared.

HORNET KILLER is another product that may be used as a direct therapy.

Prior to spraying the tents, you will still need to poke 3-4 holes in each of them, but once the access points have been created, soak the nest down for an efficient kill.

Remember, this is only effective for treating nests directly; it is not recommended for spraying over leaves, since this will cause harm to the tree, shrub, or other plant being treated.

Fortunately, there are two items that will both prevent them from entering and kill them if they do attempt to do so.

This concentrate, when mixed with water, may be put to the foundation and up the side of the house a few feet to create a barrier that caterpillars will be unable to crawl through.

Cypermethrin is extremely irritating to caterpillars and will kill those that are present while also leaving a strong residue to deter future infestations.

When caterpillars are active, apply 1 gallon per 500 sq/ft of surface area and withdraw once every 2 weeks while they are active.

However, FS MP AEROSOL should be used in locations where a liquid cannot be used.

It, too, may be used along baseboards, around window frames, and even higher up on the ceiling by way of crown molding.

If you don’t act quickly, you may expect to observe a large number of adult moths hatching out of pupa cocoons in the first 1-2 months after the first invasion.

Our regular sprayer has a maximum reach of approximately 15 feet and is adequate for small applications.

It is capable of reaching distances of up to 30 feet and is fully portable due to the fact that it operates by pumping out a mixed solution from a 5 gallon bucket.

These will spray as far as your garden hose is capable of reaching.

However, once they begin their spring feeding, their chewing and devouring may cause significant damage and stress to a wide variety of trees and plants.

With any hope, this will prevent them from entering the structure.

Treat early in the season to keep tent caterpillar numbers under control; kill as many as you can once the season is in full bloom otherwise you will have that many more tent caterpillars to deal with the following year if you do not treat early in the season.

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