How to Get Rid of Plaster Bagworms

Plastic bagworms, also called household casebearer or egg sacs, are tiny bugs that appear gray hanging on your walls or ceilings. While these bugs feed and grow on trees, they can invade your home and cause damage if ignored. However, there are effective ways to get rid of these bugs from your home.

This guide discusses plaster bagworms more in-depth. Furthermore, we’ll dive into the causes of plaster bagworms and how to rid them from your home. Finally, you’ll learn how to naturally eliminate plaster bagworms and with effective products to improve your knowledge.

What are plaster bagworms?

Plaster bagworms are household pests similar to pumpkin seeds or caterpillars with a tapered end and a broad middle. These bugs range from tiny to large and eventually turn into clothes moths that can severely damage items in your home.

Plaster bagworms feed on silk and wool and can gather household materials to create a shelter case for vulnerable larvae. Furthermore, these bugs are gray with distinct dark spots and work together in numbers. In addition, you can find these tiny bugs in high humidity areas, on trees, and even in your home.

What causes plaster bagworms in my house?

A plaster bagworm is like a pumpkin seed commonly found in humid environments. However, these bugs eat fibers and deciduous trees and can show up in your home out of nowhere. While these insects have basic survival needs, their diet varies, and plaster bagworms eat wool, old webs, hair, and even dead bugs. We will dive into the causes below:

Humid Environment

These insects thrive in a humid climate, making it easy to appear anywhere and anytime. Winter kill bagworms, and they hide in their case during cold temperatures. If your home is in a highly-populated area without mitigating measures, it is vulnerable to these plaster bugs and adult moths. 

Bagworms spread, lay eggs and grow into the larval stage in these areas. For example, if you stay in coastal states with prevalent humidity and high temperature, your home is vulnerable to bagworm infestation. 

Old spider web

Old spider webAn old web is another reason plaster bagworms can invade your home. These insects are always on the hunt for food, and abandoned webs are one of their favorites. Unfortunately, plaster bagworm can become a problem in your home if you have an old web hanging on your ceilings.

Plaster bagworms consume old webs because of their silk fiber content. In addition, they enjoy munching on silk fiber because it is necessary to create their case. 

Shed Human hair

Another definitive cause of plaster bagworm in your home is the shed of hair. You can even set moth traps with this hair. These insects can consume various things, and hair is one that they love. The smell attracts plaster bagworm, so get rid of it. If you want these insects to keep away from your home, consider regular cleaning or repelling them with spray insecticides.

Dead insect

Dead insectWhile these insects have different food sources, they consume any dead insect. Deceased insects can be the major cause of plaster bagworms on your ceiling. They can also smuggle into your home if you have dead insects under your carpets or rug.

Adult plaster bagworms can find their way into your garage, basement, or bedroom, searching for insects when needed for food.

Plant material

The natural fibers in plants are an ideal food source for plaster bagworms. While these insects feed and grow on trees, they consume plant materials and other natural fibers for survival. So the plants in your garden or yard can cause plaster bagworm infestations in your home. 

Ways to eliminate plaster bagworms in homes

Unlike other pests, these insects can invade your home and damage walls, ceilings, and other materials, making eradication necessary. You can naturally deter plaster bagworms with various methods, and we will discuss each.

1. Clean your Home

When riding these tiny bugs from your home, your first pest control task is cleaning the house. Thorough cleaning is your best line of defense against these home-damaging insects. For example, you can clean bagworm eggs in your home with a household vacuum cleaner and eradicate any organic material.

These organic materials can serve as food sources for these insects, and eradicating them streamlines the process. Keep the window sills and corners in mind as these areas can house webs. Eradicating moth’s larvae food sources from your home is ideal because they cannot survive without food.

2. Store your Clothes

Consider arranging your clothes and putting each to keep these insects away from your home. If you find plaster bagworms in your fabrics, it’s time to fold and keep silk fibers away from these bugs. These insects enjoy consuming wool fibers, and restricting their access to wool will help your cause. 

Consider putting your clothes in a sealed plastic bag to prevent any pest problems. In addition, introducing mothballs in the bag will give some added protection to your clothes.

3. Remove larvae from your home

After placing your clothes in sealed plastic bags, it’s time to remove larvae from your home. If you find larvae in your clothes or anywhere in your home, remove them immediately to repel plaster bagworm infestations.

running the clothes through a hot wash cycleFurthermore, you can have a minor infestation in your clothes. But running the clothes through a hot wash cycle is your solution. But if you have a significant infestation, consider sealing the material in a plastic bag and dumping it outside.

4. Remove Rotten Wood

Consider removing rotten woods now that you have clothes in plastic bags and larvae out of your home. These woods are a significant source of attraction for these bugs, and removing them will keep your home safe from bagworms. In addition, most rotten woods have moisture attracting these insects, and consider getting a screwdriver for the removal process.

Fungus and bacteria can grow and lead to significant infestation if you notice rotten woods in your home. Apply pressure with a screwdriver to the rotten woods and remove it. Consider replacing the wood to deny these tiny bugs shelter in your home.

5. Spray Insecticide

Well-fed moths living in your home can cause minor or large plaster bag worm infestation. But you can get rid of bagworm species with effective spray pesticides. In addition, consider getting a surface treatment insecticide to eradicate these natural predators from your home. Furthermore, invest in products listing these tiny bugs as insects the insecticide kills.

The rug and rug pads in your home are ideal locations to check for wood fiber infestation. You can take the rug outside and check it thoroughly in an open space. Consider treating the rug outside and leave for a few hours before returning inside.

How to get rid of plaster bagworms naturally

1. Remove plaster bagworm with a vacuum cleaner

When eradicating plaster bagworms from your home, your first step is getting a vacuum cleaner. This equipment is your best friend against these tiny bugs, even at the caterpillar stage. In addition, you can prevent structural materials damage.

Consider getting a standard vacuum with a hose attachment for easy removal and cleaning. Reducing these tiny bugs in numbers is safe and minimizing their mating chances. Consider emptying the vacuum bags before focusing on removing debris.

2. Clean up debris plaster bagworms eat

Cleaning off debris is a crucial pest control way to get rid of these insects in your home. Unfortunately, they thrive in an unkempt environment and can hang around on your dirty ceilings and walls. Consider starting the treatment process by cleaning infested areas to eliminate pest problems.

Ensure you remove every debris, dust, and webs and seal cracks in your walls. These webs can be invisible or transparent to the human eye but getting a flashlight is your solution. Consider shining the light into dark corners in your home and removing the webs. Also, check your roof, baseboards, and foundation for webs attracting insects into your home.

3. Turn off lights outdoors

Turn off lights outdoorsAfter using a vacuum and cleaning off debris in your home, consider turning off the lights outdoors. Light attracts these insects, especially at night. So, consider turning off your patio, deck, and security lights. Furthermore, you can turn off-pathway markers and other light sources attracting these bugs into your home.

But if you need to turn the light on overnight, consider using a yellow bulb. Yellow bulbs do not attract these insects and turn off lights inside your house or cover them with curtains. Instead, consider covering your door gaps, windows, and other areas to prevent plaster bagworms inside.

4. Keep humidity low

Another natural pest control way to get rid of these bugs from your home is to keep humidity levels low. Plaster bagworms live and thrive in high moisture areas, and keeping them down will keep bagworms away. You can control humidity levels in rooms with an air conditioner or a dehumidifier. Also, consider opening the windows for cross ventilation and clean water spillage from the shower or sink.

It will be best to get essential oils with a pest control plan and wipe off all drink spills as they attract these insects. Furthermore, you can set up box fans to keep humidity levels low and make the environment difficult for these insects.

5. Keep spiders away

Keep spiders awayIf you have abandoned cobwebs nearby, it’s time to remove them. Spider webs are an ideal food source for these insects, and keeping them away will reduce plaster bagworm numbers in your home.

While spiders are beneficial as they keep pests away from your home, they leave webs hanging and do not clean themselves up. The fiber in spider webs is necessary for these bugs to create a shelter case. Furthermore, it is a longstanding meal for these insects, so consider eradicating them with natural solutions. 

Frequently asked questions

Are plaster bagworms harmful to humans or pets?

These tiny bugs are not harmful to humans and pets. Your children and pets are safe around these bugs, but they can damage items in your home. Furthermore, these insects can cause structural instabilities and destroy your property. Many of these insects in your home are dangerous to your walls, plaster, and other surfaces.

Do plaster bagworms bite?

These insects are not dangerous to humans as they do not sting, bite or transmit hazardous diseases. While these insects are destructive nuisances, they do not bite humans and cannot cause harmful conditions. Furthermore, your children and family’s health are safe around these insects, but your home is at risk.


A humid environment, old spider webs, shed human hair, and dead insects are ideal causes of these tiny bugs in your home. However, you can naturally keep these insects away from your house with products. Consider keeping humidity low and turning off lights outdoors, and these insects will be effectively removed. 

If these insects invade your home and cause severe damage, get an insecticide from a pest control company. Furthermore, these insects will stay away from your home if you eradicate their food sources from the environment.

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