How To Identify and Get Rid of Plaster Bagworms For Good

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Do you keep seeing moth flying around your home or small cocoons hanging from your ceiling?

Plaster bagworms are annoying and hard to get rid of. 

Don’t worry, I’ve got you covered. 

In this post, I will help you identify if you have plaster bagworms and give you different ways you can use to get rid of them. 

Let’s dive in. 

What do Plaster Bagworms look like?

The plaster bagworm is a bug that often goes unnoticed or is mistaken for something else.

Most people might see the plaster bagworm in their home but never truly know what it’s called. Another common name for the plaster bagworm is a household casebearere.

The key to getting rid of the plaster bagworm is identifying the insect in your home.

Once you do this, you can begin getting rid of the infestation.

Life Cycle

The plaster bagworm goes through 4 different stages in their life cycle.

  • Egg
  • Larva
  • Pupa
  • Adult


The eggs of the plaster bagworm as very small. They measure around 0.4mm.

Females can lay hundreds of eggs at a time.

She will place these along wall or floor junctions and use debris to hide them and keep them in place.


The larva is unique because most people don’t see it.

The larva constructs a silken case that it hides inside.

The larva will take this everywhere until it is ready to leave.

The silken case typically takes the shape of a pumpkin seed.

It’s often slender, flat, and composed of different materials such as debris and silk fibers.

The larva itself is all white with a blackhead. They reach around 7mm.

plaster bagworm larva


The pupa stage takes place inside the silken case.

The lava will attach the silken case to a wall and make a slit.

Once it goes through the eclosion, the larva will come halfway outside of the case.

plaster bagworm pupa


After going through the eclosion period, the pupa emerges as a moth.

The females are around 10 – 13mm long. Males are typically smaller, only measuring around 7 to 9mm.

Both moths have dense hairs on their heads. They are typically grey to light brown with a few patches on their wings.

adult plaster bagworm

How To Get Rid Of Plaster Bagworms?

Unlike other pests that enter your house, its not always easy as spraying chemicals. But there are several much easier methods you can use to get rid of plaster bagworms. 

Let’s get started. 

1. Deep Clean

One of the easiest ways to get rid of the plaster bagworms is to do a deep cleaning.

While their name may suggest that they eat plaster this is not the case. Plaster bagworms survive off organic materials such as cobwebs, silk fibers, hair, and other organic debris found around your home.

They get their name because they are commonly found inside plaster walls, on walls, or hanging from ceilings.

The best way to keep these pests out of your home is to vacuum and sweep up your home.

You want to make sure you get any fibers or organic materials that may be on your walls or floors.

Also another common source of food is spider webs due to the organic silk compound insids. Using a flashlight make sure you remove any old spider webs around your house.

Plaster bagworms are small, even a small line of spider web can feed them for quite a long time.

Its important that you look for spider webs on your walls, any cracks, foundation, behind appliances, and corners.

Eliminating food sources for the plaster bagworm will make your home less appealing.

Maintaining the cleanliness of your home is crucial to controlling these pests inside your home.

2. Control Humidity

Plastre bagworms thrive in humidity and moisture. This is one of the reasons humid states such as Florida and other costal states experience most of the infestations.

Eliminating moisture and humidity will make it harder for them to survive.

You can use this by using a dehumidifier and keeping your air conditioner on.

It’s best to place your dehumidifiers in areas where plaster bagworms are common.

This is typically in dark and undisturbed locations such as closets or unused rooms.

This will make sure that there the humidity in these crucial areas is low.

Often, closets and smaller rooms will not have an Air conditioner. This is why it’s essential to make sure you use a humidifier in these rooms.

If you don’t have an air conditioner or humidifier you can keep air circulating in your home by leaving your windows open keeping box fans in your home.

This will help reduce humidity in your home.

It is important that if you do leave your windows open that you have window screens on. Without window screens there is the possibility that more bagworms enter your home.

3. Wash Away Bagworms

If you have plaster bagworms inside your home, its very likely that you have plaster bagworms outside your homes as well.

Many times, infestations start outdoors and move indoors as moths are able to enter your home through cracks, open doors and windows.

Outdoors you will commonly find plaster bagworms hanging over your roof or along the walls of your home.

Its also possible to find them hanging off trees or plants you may have around your home.

If this is the case a very easy and natural way to get rid of them is by using a pressure washer.

You can use the pressure washer to wash of your home. The water will remove any potential food source for other plaster bagworms and will also kill any bagworms due to the high pressure.

4. Use moth traps

Another way you can keep moths away from your home is using moth traps. You can use this both inside and outside of your home.

Similar to mosquitos these insects are attracted to light and heat. You can use mosquito traps to attract moths both inside and outside your home.

I recommend you avoid using traditional glue traps. These are not as effective and do not attract moths as much as other traps.

I recommend using a mosquito trap. These are just as effective on moths and they have multiple mechanisms built in to attracts moths.

This includes as light and heat source as well as pheromones’. These are easier to clean and are more discrete.

You can have these set up without seeing disgusting, dead moths around your home.

Below are some of the best moth traps you can use around your home.

It’s important to note that these traps only catch adult moths and do not target the source of the damage.

Over time you can kill off the population but they will continue to preproduce, and grow if the larva and eggs are not treated directly.

5. Use Dust And Spray For Added Protection

For added protection, you can also use chemicals to help you get rid of the carpet moths.

Two common approaches are dust and spray treatments.

To use these methods you would apply a layer of dust to the carpet. Using a brush or broom to move the carpet to allow the dust to penetrate deep into the carpet.

This dust is designed to kill eggs or larvae that are living inside the carpet.

Likewise, you can do the same with a spray treatment. You would use the spray to inject the chemical deep into the carpet.

This will kill any larvae or eggs that are living inside the carpet.

After using these chemicals it’s important that you clean up properly afterward.

When using the dust, be sure that you vacuum afterward. You do not want to leave the dust inside the carpet. When people walk over the carpet, the dust will get suspended in the air and your family could ingest the dust.

Likewise, when using the spray you can opt to wipe down any areas outside of the carpet that you may have sprayed accidentally.

Typically, sprays will have a residual effect which is a huge advantage compared to using dust.

With any treatment, I recommended that you repeat this process monthly for 2-4 months to ensure that you fully eliminate the moth population.

6. Fumigation

Another option for getting rid of carpet moths is fumigation. While this does seem a bit excessive you do not need to call in a professional.

First, you can fumigate using vapor packs such as Nuvan Pro Strips. These are highly effective and potent fumigation packs that you can use.

This method works much better if the area is small and easy to seal off. This will allow for the most effective use of the vapors.

If you are treating large rooms such as living rooms or family rooms that are hard to seal off I suggest you avoid fumigation.

When fumigating your house, ideally you want to leave the area undisturbed and sealed off for around 24-48 hours.

This provides the most effective results.

Once you are done fumigating, it’s important to ventilate the room properly. Allow for four to six hours for the room to ventilate before you return.

This is extremely important because the chemical used by Nuvan is highly toxic if inhaled for extended periods of time.

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