What Do Bagworms Look Like


First off, I would pinch apart the cocoons to see if anything is in them. These infections spread through the hive like wildfire. The bags look like baseball bat-shaped ornaments hanging from the. It appears that they prefer the trees along the edges of the forest over the trail, perhaps because it’s sunnier, warmer, easier to find, less dangerous, or tastier. What do I do if there are worms in my well water? What do I need to know before I start worming puppies? What is a typical pine tree worm? What is the best spray to get rid of bag worms? What kind of aquarium parasites look like white worms?. Completed bags range from 1½ to 2½ inches long. Caterpillars need to eat a lot, and the plants need to be available for the adult females to lay their eggs on. Wood Replacement Patch. What does spider mite feeding look like? Large holes in the leaf. It looks like they have even spread (heavily) as far away as Australia. Bagworms are moths whose larvae feed on evergreens such as spruce, juniper, pine and arborvitae. These insects multiply rapidly, collecting by the thousands. Are you sure you want to delete this answer? Yes No. Newborn larva emerge from the bottom of the hanging case and drop down on a strand of silk. Bagworm Moth caterpillars wrap themselves in a silk cocoon onto which heaps of dead plant matter are laid. She lacks eyes, antennae, wings, legs, and functional mouth parts. This is a common pest of some arborvitae trees, and it is occasionally found in Thuja Green Giant. What Are Webworms?. They have a pretty good looking yellow color (lemon yellow) that makes them look attractive. Photo credit: melvyn yeo/Flickr. The male bagworms which are black with clear wings, leaves his bag and flies to the female, mates and dies several days later. Though they prefer evergreens like juniper, cedar, and spruce, bagworms will attach themselves to more than 120 different types of trees if given the opportunity. Anyone ever dealt with bagworms in their evergreens? We have a row of 60+ foot high cedars that act as a screen and windbreak. Ghost ants do not sting, as they lack a stinger. Here is some detailed information on bald cypress trees. Bagworm sacks can be very hard to find because they look like pine cones. Newborn larva emerge from the bottom of the hanging case and drop down on a strand of silk. Apparently the larvae feed on lichens growing on tree trunks, rocks, etc. If plant growth does not look normal, evaluate plants to determine what is causing the problem. Most often the bagworms infest Leyland Cypress, Japanese maple and spruce (all varieties). These bats like to eat beetles, moths, mosquitoes, and more. These particular army worms are 'beet army worms'. Bagworms can be deadly to some plants. At first the bags are only about 1/8 inch long. I sprayed one tree near junipers when I sprayed the junipers for bagworms. Dirt: What should I do about bagworms getting on trees and shrubs? Most people are giving the advice to just. Volatile Organic Compounds in Plaster and Drywall Plaster and drywall (a building product made of plaster and paper) contain volatile organic compounds (VOCs) that can be toxic even if you are not allergic to them, but often people do suffer allergy symptoms. Bagworms don't typically cause immense damage to plants, but the bags are unsightly, especially when numbers are large. This rating was based on studies in mice. They tend to attack treetops, but while budworm leave some remnants of needles behind, sawfly strips everything away. No they won't die when the tree dies. A B Pest Control & Insulation takes a closer look at the difference between bagworms & webworms. The male bagworms which are black with clear wings, leaves his bag and flies to the female, mates and dies several days later. Handpicking bagworms off the plants is the cheapest way to control them, particularly in the winter months. Virus-like Diseases. In this way, it will be easier to protect your trees and plants. buckthorn and some native trees hold their leaves. For larger trees, the cost can be much higher, with costs between $500 and $2000. The larvae grow to 1 inch long and have a brown abdomen with a. How to Get Rid of Moth Worms. However, natural enemies oMen can’t prevent the bagworms from damaging plants. The fat bags contain females certain to have hundreds of eggs ready and waiting to be fertilized by a male. The adult female looks like a maggot, with no functional eyes, legs or antennae. The males fly to the females. Those look like bagworms to me. Female bagworms look like maggots and are yellow in color. If you wait too long (like I did) and the insects are pupating inside their bags, it is too late to use. It was very dry and stiff. But we have seen very high populations and infestations on Japanese Maples and many other tree types. Skipper caterpillars are mostly nocturnal and create shelters by folding leaves. They resemble more like maggots rather than months. They are most often found on conifers like juniper, pine, arborvitae, cyprus, cedar, and spruce, but they can also invade a variety of other trees. She lacks eyes, antennae, wings, legs, and functional mouth parts. What damage do bagworms do?. After closer observation, do you notice a dark brown to black caterpillar sticking its head out? What is this caterpillar? This is no ordinary caterpillar. The ring-like segments on the body of this caterpillar are covered with minute hair. Full blast. If you see little cone shaped things on your cedar tree, more than likely you have bagworms, because. Slit-like openings are located at each end. What is a Bagworm like? Adult males of this species of moths are dark and hairy in appearance with a wingspan of approximately 1 inch. What are they, and what can you do to keep them away? Here is the Arborist Now complete guide to bagworms, the damage they do to trees, and how to get rid of them completely. In small numbers, they are easily controlled and do little damage, but large infestations can destroy entire trees by devouring all the leaves. Purplish gray spots on the stem. A closer look may show small, tan, oval-shaped, cocoon-like structures hanging down from your plant's branches. Most iris varieties do not like to be in moist conditions as rot can set in. Bagworms are voracious gluttons -- unless controlled, they'll quickly strip an evergreen of its foliage and may kill it. Learn more about Methionine uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Methionine. When disturbed, the larva immediately pulls its head into the bag and holds the opening closed. What do I do if there are worms in my well water? What do I need to know before I start worming puppies? What is a typical pine tree worm? What is the best spray to get rid of bag worms? What kind of aquarium parasites look like white worms?. For a (graphic) visual demonstration of mango worm extraction, have a look at the video below. The larva within the bag is brown or tan, mottled with black, and the bee-like adult males have clear wings and fur-covered bodies. buckthorn and some native trees hold their leaves. The bag is made of silk and bits of host foliage. In his off time, Raines leads children out on tours into the woods to look close, look up, look around. They look like a ruffly colonial-era cravat. There are three different insects that are pest on trees where the names are sometimes confused or interchanged. Bagworms overwinter in the egg stage inside the female bags, which are fastened to twigs. They are made with females in their bags, which look like cones hanging from the host plants. It is a native bagworm moth larvae. For many areas in southern Iowa ("bagworm territory"), it is now too late to treat for bagworms. Bagworms love arborvitae and red cedar, but they will also eat from juniper, black locust, oak, sycamore, pine, spruce and more. To see if it is a fir or spruce, check the side branches of the tree because some fir branches, like those at the top, do grow like a spruce with needles on all. Also, I would like to add some grass seed to some sparse spots - should I do that before or after getting the weed problem under control? Thanks in advance for any suggestions!. These are evidence that your plant was attacked by bagworms last summer. Their bags, which remain attached to the plants even after the bagworms are gone, are brown and about 1 to 2 ½ inches long. The nymph is basically a small version of the adult insect. The adult female bagworm looks like a large caterpillar. Carbaryl belongs to the chemical class called carbamates. Now I would like to. What should l do. 2011 , this photo is related to locality find: id5685 photo fid5833, Ilian. Slit-like openings are located at each end. When the bagworms are hungry, they will move to all kinds of trees, bushes and other plants. Bagworm larvae infest both evergreen and deciduous trees. Insects just trundle along and eat whatever they can find; it's not like they go out of their way to be sadistic about it. Fight these pests and diseases organically or with insecticides just like you do others in your garden. Address them quickly and your landscape plants will be grateful. The damage it causes is disheartening, but you can arm yourself with knowledge and keep this pest under control in your yard. Each bag contains a small insect that looks like a worm. About the size of a quarter, male bagworms are ashy-black moths with transparent wings. Slide it over the plant and push into the soil. In the insect’s case, however, the costume serves a more serious purpose, protecting it against predators by making the bug look larger or better protected than it really is. While bagworms do have a reputation of devouring “cedars” when present in large enough numbers, they are opportunistic and will chow down on almost any plant where the wind will take them—literally. So What's a Bagworm? Adult bagworms differ in appearance depending on their gender. Many worms only cause cosmetic damage by chewing on relatively few needles on a tree, but others can defoliate an entire tree within days. Bagworms are white larva that eat the needles of many evergreen tree species, including the cedar. Bagworms are often found on arborvitae, fir, hemlock, juniper pin and spruce trees. We continue to offer a wide selection of quality products and provide superior customer service. New bagworms hatch about mid-June, so this is the time to be watching for caterpillar activity and spraying once a week until it stops. and hanging from the branches — look to many people like pinecones, so cause no. For a (graphic) visual demonstration of mango worm extraction, have a look at the video below. Since deciduous plants grow new leaves each year, the defoliation caused by the feeding usually does not kill them. As the bagworm grows, so does the bag that contains them. Once the eggs hatch, the larva spins a silk strand that hangs down it. Slide it over the plant and push into the soil. What’s the best product to kill bag worms on an Alberta Spruce? We have been picking them off and putting in a plastic bag and disposing of them as well as spraying a liquid insecticide; however, we can’t seem to get rid of them. Often they are referred to as bagworms which causes some confusion because bagworms are a different insect. Controlling Bagworms Now Can Save a Headache Later. Carbaryl belongs to the chemical class called carbamates. Bagworms can be a problem on deciduous trees as well, but they typically do not kill them. Because they look so much like a part of the tree they may go unnoticed until extensive damage has occurred. The adult female bagworm does not look like a moth and never leaves her bag. What's NOT a Tent Caterpillar? There are many similar caterpillar/moth species that look a lot like tent caterpillars: Army Worms – These destructive pests target crops and lawns rather than trees. There are so many different types of worms that love to hang out in trees that it's tough to keep track. In addition, by being on the water hose you can really spray pretty high and then you do not have to worry if you mixed enough chemicals. Upon reaching a suitable host, the worm spins a tiny bag of silk and plant debris that looks like an upside down ice cream cone. Several bugs resemble seeds, and some grow in large sunflower seed-shaped pupae or exoskeletons. Mature specimens are plain brown above with two rows The Eastern Worm Snake ( Carphophis amoenus ) when immature and seen from a distance may resemble photo fid8838, Petra a Pavel Štěpánek , 19. Apart from pests of stored food products there are clothes moths and their relatives who eat our carpets and jumpers, cutworms that eat the roots of our lawns as well as Budworms, Bagworms and Fruitworms feeding on our plants. Here is my list of the most frequently encountered ‘Arborvitae Aggravations’, based on the samples and questions we get in the PPDL; in no particular order. The Blair Catalog: Classic Clothing and Home Goods For over 100 years, Blair has been an American household name for catalog shopping. Bird predation and insect parasitism can help keep bagworm outbreaks brief. It was beautiful, but now has one side that is dried up and looks dead. Look for other signs, such as webs for spiders, tunneling on the stems and. Besides looking for the larvae, there aren't many signs of the bagworms. Application is prohibited directly into sewers or drains, or to any area like a gutter where drainage to sewers, storm drains, water bodies, or aquatic habitat can occur. However, they don’t get satisfaction by looking at them--because they don’t have eyes-- their satisfaction comes from eating them. The bag is made of silk and bits of host foliage. Rich green color. There are black worms inside of each "pod. They weave the matter tightly together to both hide and strengthen the bag. The first stage of incomplete metamorphosis is the egg. "If you do live in areas where it was colder than 0˚F you should check your bagworm infested plants for new bags starting in late May," Sadof said. The Japanese beetle, a most destructive garden pest, devours just about everything in its path, including well-tended trees and shrubs. What's it cost to treat bagworms? The cost depends on the size of the tree, but ranges from $80 - $145 for one tree. The adult female bagworm does not look like a moth and never leaves her bag. Video of the Day. Bagworms have hatched in the Miami Valley and feeding is progressing. She looks more like a maggot than a moth. Next June, those eggs will hatch and the cycle starts over again. Besides holes, these pests can also leave behind shed pupae skins, webbing, and frass, insect excrement that looks like large grains of sand, according to pest management brand Woodstream. Top and bottom of leaves. Learn more about Methionine uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Methionine. How do you control bagworms? Right now, I. EDMOND, Okla. It can look like an empty case or shell. These Bagworms eventually become winged adult moths that are dark brown, light brown, or two-toned depending on the species. They are pretty nasty. Mother Nature does not ring every tree with bricks and hostas, and neither should you. Bagworms can be identified by spindleshaped bags one or two inches long that hang from trees and shrubs. Bagworms are voracious gluttons -- unless controlled, they'll quickly strip an evergreen of its foliage and may kill it. After closer observation, do you notice a dark brown to black caterpillar sticking its head out? What is this caterpillar? This is no ordinary caterpillar. If a bagworm is released, the casing bounces to the ground and disappears. How to Get Rid of Tree Worms. We put this Bagworm back to our backyard after taking the above photo. pots-3' tall! Evergreen tree grows 3 feet a year. Learn more about Methionine uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Methionine. If you have bagworms in your landscape, those moth larvae that spin large, bag-like eyesores in tree branches, you've probably been told there's not much you can do but cut them out of the tree and destroy them. They have long antennae, and move in a wiggling motion that resembles the movement of a fish. Nymphs usually have a thin exoskeleton and no wings. In the South as in other places, bagworms can be a serious problem. To see if it is a fir or spruce, check the side branches of the tree because some fir branches, like those at the top, do grow like a spruce with needles on all. Do not confuse bagworms with fall webworm that makes a large spider like webbing on wild. What is it, and what do I do about it?. Dirt: What should I do about bagworms getting on trees and shrubs? Most people are giving the advice to just. We found this Bagworm in Anstead Forest on Mar 2009. “It will look like pinholes from a machine gun in a. Or, we can apply an insecticide treatment to control them. The best time to get rid of bagworms is in May because that is when they are vulnerable and prone to dying. What are their favorite delicacies? Well, bagworms will eat deciduous plants, but they really prefer needleleaf evergreens, such arborvitae, false cypress, Leyland cypress, juniper, and spruce. The disease symptoms first appear on the under surface of mature leaves in early summer as small, olive-green, velvety spots. Bagworms are as repulsive as they sound. Purplish gray spots on the stem. Once mated, the adult female deposits 400 to 1,000 eggs in the empty pupal case (Fig. Landscapers may unintentionally transport bagworms in the process of pruning and moving infested plant material. Not at all. Plaster bagworms are a close relative of the clothes moth. The fall webworm also presents a problem in Asia and Europe, where it was introduced. Males look like small moths with dark wings and the females look like a yellow maggot or caterpillar. Bagworm control starts with understanding the worm itself. They will hatch and look for another tree to populate. She lacks eyes, antennae, wings, legs, and functional mouth parts. So, June and July are the months to scout out and remove those pesky bagworms that appear on our evergreens. They weave the matter tightly together to both hide and strengthen the bag. However, pruning should be delayed for most spring-blooming shrubs until immediately after flowering to avoid reducing the floral display. Pruning Arborvitae Trees: Once established, Arborvitae grow with little care for many years. Since this tree is so tough and hardy, they are only very rarely attacked by this insect. Life Cycle. This rating was based on studies in mice. Fall webworm webs are formed at the ends of branches and do not appear until mid summer. Nymphs are small, oval, and translucent. This understanding drives us toward our continued commitment to excellence. Of course my family thinks I'm nuts for getting excited over a disgusting ugly worm. Bagworms have been hatching for the past week or so. What do Squirrels Like to Eat? – Squirrels are entertaining, independent, exceptional as well as innocent animals. In small numbers, they are easily controlled and do little damage, but large infestations can destroy entire trees by devouring all the leaves. Q: I have two 15 feet tall bald Cypress in my yard. I like the way the cocoon is constructed. IT CREATES THIS BRONZING EFFECT MAKES THE TREE LOOK UNHEALTHY AND THEN IT HAPPENS MORE AND MORE. Do not allow the product to enter any drain during or after application. Looks Like the Worm is Out of the Bag (All about bagworms and how to manage them on your landscape plants) More information Find this Pin and more on Tree & Shrub Care Advice by Tomlinson Bomberger Lawn Care, Landscape & Pest Control. It looks like this is going to be one of those years!. Several bugs resemble seeds, and some grow in large sunflower seed-shaped pupae or exoskeletons. It has clear wings and strong legs adapted for jumping. How To's & Quick Tips; 11 Ways to Get Rid of Mice. Someone who does not know what they are could mistake them for tiny pine cones. Check your evergreens for Bagworms! Bagworms look like small pinecones and many people do not realize they have them until they see the damage. “It will look like pinholes from a machine gun in a. If the larvae are actively feeding, then a chemical treatment will take care of the problem. The entire thing is about half an inch long. The fall webworm also presents a problem in Asia and Europe, where it was introduced. Last year’s cocoons are easier to spot than the tiny structures made by. His rationale: “Make a walk not only fun but educational. Application is prohibited directly into sewers or drains, or to any area like a gutter where drainage to sewers, storm drains, water bodies, or aquatic habitat can occur. What Are Webworms?. Check your evergreens for Bagworms! Bagworms look like small pinecones and many people do not realize they have them until they see the damage. Bagworms are caterpillar pests with spindle-shaped bags. These infections spread through the hive like wildfire. Young bagworms are hard to see at first; look closely for the small, upright bags which have the appearance of tiny ice cream cones made of bits of plant material. The household casebearer, Phereoeca uterella, is a moth in the Tineidae family of Lepidoptera. The 1st instar caterpillars are very small with their bags measuring around 1/8" in length. The eggs overwinter inside their mother’s case and in spring, it all begins again. Read more. Size ranges from 1 1/2 to 2 inches long. The bag is made of silk and bits of host foliage. The larvae can also feed on deciduous trees such as maple, elm, birch and sycamore. Mealworms are the brown worm-like larvae of darkling beetles. Sometimes these bags are even found on the sides of homes or on yard furniture as well. The forest tent caterpillar are around 2 inches in length and have a pale grayish-blue body with fine orange black lines and white spots on its back. But, if bag worms are all over your shrubs you may need a pesticide to do the trick. On the edge of some of the branches there is a growth that looks like cotton about 3/8 to 1/2 in diameter. These little cocoons or sacks may have anywhere from five hundred to a thousand eggs, which hatch in the spring. Baylee Wonders, “Why do worms live in the ground?” Thanks for WONDERing with us, Baylee! The answers to these questions depend in part on what type of worm you're talking about. This behavior is called 'balloning' and helps bagworms get to new plants. What should the pressure of your hose look like as you water your tree? A little bit more than a trickle, not full blast. "There isn't usually a sign before that, other than leaves falling off the trees or things like that. Good description: the bags look like small pine cones! The bags are very difficult to tear open: they are silk!. Each bag contains a worm or caterpillar inside that. Unfortunately, many trees in the Dallas/Fort Worth area are planted improperly, setting them up for a host of problems down the road. Since deciduous plants grow new leaves each year, the defoliation caused by the feeding usually does not kill them. Today’s Wonder of the Day was inspired by Baylee. Bagworms do not create any type of health hazards to humans, but they can cause significant damage to host trees by defoliating the leaves and causing them to turn brown. They have a pretty good looking yellow color (lemon yellow) that makes them look attractive. These bags often look like pine cones, only these pine cones move. They look like small caterpillars. I was so excited to see the worm and not just the bags I normally see. Female bagworms look like maggots and are yellow. Tree bagworms can, in some cases, destroy a tree in less than a year. Defoliation of coniferous evergreens can be a problem because these plants depend on these needles to conduct photosynthesis over several years. How to get rid of evergreen-eating bagworms. These small spindle-shaped bags hanging from your arborvitae's branches like Christmas tree ornaments indicate its presence. Wood Replacement Patch. Virus-like Diseases. Tent caterpillars are black with distinguishable hairs covering their bodies. The worm is feeding on the sap in the branch where it is attached through a feeding tube that. In my area, one of the most serious bagworm moths is Thyridopteryx ephemeraeformis, the Evergreen Bagworm Moth. Q: Do bagworms kill trees? A: If there is a large infestation of bagworms on an evergreen tree, it is indeed possible for them to kill the tree if the defoliation is severe. Grass Bagworms are attached to grass until they pupate, then it attaches its bag to the sides of fences and buildings. Please take the time to inspect your landscape for bagworms. She looks more like a maggot than a moth. Unfortunately, many trees in the Dallas/Fort Worth area are planted improperly, setting them up for a host of problems down the road. Carpenter bees are large wood-boring bees that resemble bumble bees. Here is my list of the most frequently encountered ‘Arborvitae Aggravations’, based on the samples and questions we get in the PPDL; in no particular order. How to tell the difference between the two! It’s really not hard at all since bagworms make silk cases that are covered in foliage and other plant material, making them look a little like homemade pinecones hanging from the branches. "Nothing like this. ), Conserve® and others. It's important to stress that many people with a colostomy enjoy a good sex life, but it can take several months to build up the confidence and trust to make this possible. They do not carry other diseases with them and they do not cause complications themselves outside of the boil that they create. If they are, how do I treat the tree? 3. This provides them with enough energy to construct a. At first the bags are only about 1/8 inch long. Male bagworms develop into moths while female bagworms crawl or are blown. EcoMeg explains what bagworms look like and how to control them. They feed on the tree in which they reside, and they create large brown patches where your once-healthy tree once thrived. Like budworms, sawfly damage becomes evident in late May or early June. Site introduces to all of Bayer's business segments, the corporate policy, the company history, news, and events. They are a dull grey with darker markings close to their heads. They will hatch and look for another tree to populate. Some people prefer the more natural look of leaving them unpainted, but I like to spray paint them silver. On the other hand, fall webworms look just like they sound, a web wrapped around some part of the tree. Her body is soft and yellowish-white. If you look to the bottom right of the right tree it looks like there are several of their "bags". The hive can be wiped out within hours. I fitted it on my water hose and sprayed my trees. Beat bagworms and save your tree. What are they, and what can you do to keep them away? Here is the Arborist Now complete guide to bagworms, the damage they do to trees, and how to get rid of them completely. Looks Like the Worm is Out of the Bag (All about bagworms and how to manage them on your landscape plants) More information Find this Pin and more on Tree & Shrub Care Advice by Tomlinson Bomberger Lawn Care, Landscape & Pest Control. This can turn a tree’s trunk, limbs or leaves white, as if covered by snow. Actually, upon closer examination, we're pretty sure they do. Could these be bagworms and how can I check? 2. She looks more like a maggot than a moth. You want your plants to look like they’ve been through a car wash. However, the adult female does not look like a moth. The product feels and looks old. The pest such the sap from the plant and cause the plants to suffer and not growth as vigorously as they would. Bagworms usually create bag like structures. How do you feel about your cedar trees? If you are like me and you love them sometimes, then the compromise is to trim them. When the bagworms are hungry, they will move to all kinds of trees, bushes and other plants. So it’s critical that you learn what bagworms’ damage looks like as they get started. Is this due to global warming or the mild winters? We can only speculate at this time. Overwintered Common Bagworm (Thyridopteryx ephemeraeformis) eggs are hatching in southwest Ohio. The forest tent caterpillar are around 2 inches in length and have a pale grayish-blue body with fine orange black lines and white spots on its back. Borate insecticides like Bora Care and Timbor will prevent new infestations. They are pretty nasty. Some insects are not worth fighting too hard because they do little more than buzz around a bit of water in most circumstances. The larva may stick its head and front legs out of the top of the bag to feed and move. But, there are two exceptions: black cherry trees and young trees are extremely vulnerable to tent caterpillars. Upon reaching a suitable host, the worm spins a tiny bag of silk and plant debris that looks like an upside down ice cream cone. The males drawn by female pheromones actively seek out the female to mate. What we do see is the bags which my neighbor showed me. They do prompt questions to the Home & Garden Information Center's Ask an Expert service. The pictures help a lot. We trimmed the limbs off trees w/webs & burned them but cannot reach some even w/ladder but I bet we could rig up a firey rag! What do these nasty things look like when they are finding a place to set up house? Do they come from moths? Will 'tricho grammas' do the 'trich'?. The bagworms killed 2 arborvitae and are moving on to the rest and they are also on a pine tree that is about 60 ft tall. These bags often look like pine cones, only these pine cones move. I'd really wanted to like this. The ones I found moved really fast and did repel off my finger on a web like a spider. In each place these webs can be seen that part of the bush or tree is dying. You might run into it or look up and see a tiny green worm hanging from the trees and branches right over your head! Why is a green worm hanging mid-air above you and what is it? For those people that do their best to avoid worms at all cost, this mid-air monstrosity (as tiny as he may be) can be a nightmare!. " This is the thought that I had earlier this week when I pulled back the worm bedding in one of my bins and found a tonne of small white worms. Bagworms have a case or bag that the caterpillar forms and suspends from on the plants that they feed on. They can be caused by viral infections like the severe flu or bacterial infections like tuberculosis. Insects just trundle along and eat whatever they can find; it's not like they go out of their way to be sadistic about it. Large populations of bagworms can strip plants of their foliage and eventually cause them to die. The entire thing is about half an inch long. Adult stages do. How to Get Rid of Bagworms.