How To Get Rid Of Asp Caterpillar

Asp caterpillars, though harmless looking, are venomous. If you see any around you, remove them immediately. Below is how to get rid of asp caterpillars.

They are one of the world’s most venomous species found in various parts of the world and can deliver a highly painful sting if touched.

Let’s explore everything you need to know about ASP caterpillars, from their physical characteristics to the best methods for getting rid of them. Read on!


What is An Asp Caterpillar?

How To Get Rid Of Asp Caterpillar
An Asp Caterpillar

An asp caterpillar is the larval form of the southern flannel moth, scientifically known as Megalopyge opercularis.

This caterpillar is often called the “puss caterpillar” because it looks like a fluffy cat or ball of fur.

Despite its cute appearance, the asp caterpillar is one of the most venomous caterpillars in North America.

Its body is covered in tiny, hair-like spines that carry venom. These spines can cause intense pain, swelling, and other issues if they touch your skin.


How Poisonous Are Asps?

Asp caterpillars, also called puss caterpillars, are very poisonous.

Their venomous spines look harmless but can cause serious reactions if they touch your skin.

It’s important to be careful around these caterpillars to avoid getting stung.


Does Asp Caterpillar Bite?

How To Get Rid Of Asp Caterpillar
Asp Caterpillar Bite

Asp caterpillars don’t bite like other insects. Instead, they have stinging spines that can cause a lot of pain if they feel scared or get touched.

These spines are all over the caterpillar’s body and can easily go through human skin, leading to symptoms like strong pain, swelling, and sometimes even nausea.

To avoid getting stung, it’s best to steer clear of handling asp caterpillars.


Read also: Mosquito vs Bed Bug Bites; Which is More Deadly?


What Happens If an Asp Caterpillar bites someone?

If you get stung by an asp caterpillar, you might feel immediate pain, swelling, and redness where you were stung.

The pain can be strong and might spread to other parts of your body.

You might also itch, get a rash, or even feel sick to your stomach or vomit. If you’re stung by an asp caterpillar, it’s important to see a doctor, especially if you have serious symptoms.


How Do You Treat ASP Caterpillar Stings?

To treat a sting from an asp caterpillar, begin by washing the area where you were stung with soap and water to get rid of any caterpillar hairs or venom.

Then use a cold compress to help decrease swelling and pain.

You can also take over-the-counter pain relievers like ibuprofen or acetaminophen to also lessen the discomfort.

If the symptoms don’t go away or are serious, see a doctor. Avoid scratching the sting to prevent more irritation.


Does Caterpillar Rash Go Away?

Yes, a caterpillar rash usually goes away by itself over time.

However, how long it takes can differ based on how your body reacts to the caterpillar’s venom and how bad the rash is.

Don’t scratch the rash because that can make it worse and could lead to an infection.

Use calming lotions or creams and take antihistamines to help with the itching and discomfort while the rash gets better.

If the rash doesn’t go away or gets worse, talk to a doctor for more help.


What Damage Does The Asp Caterpillar Cause?

Asp caterpillars, also known as puss caterpillars, can cause harm to plants, animals, and humans in the following ways:

  • Plants:

Asp caterpillars feed on a variety of plants, including trees, shrubs, and ornamental plants.

Their feeding habits can lead to defoliation, which weakens the plants and makes them more susceptible to disease and other stressors.

In agricultural settings, asp caterpillars damage crops and reduce yields.

  • Animals:

Asp caterpillars are venomous and can cause harm to animals that come into contact with them.

Although most animals won’t eat an asp caterpillar because of its spines, pets or wild animals might get stung if they get close to it.

The venom can cause pain, swelling, and other issues in animals, just like in humans.

  • Humans:

If a person touches an asp caterpillar, they can get a painful sting.

The venomous spines on the caterpillar can go through the skin and cause intense pain, swelling, and redness where they sting.

Sometimes, you might feel sick, vomit, or even have an allergic reaction.

Though deaths from asp caterpillar stings are rare, their sting can still be very uncomfortable and worrying.


Read also: What Do Caterpillars Eat?


How to Get Rid of Asp Caterpillar

Here’s how to get rid of asp caterpillars:

  • Identify and locate: Look for the caterpillars on plants or trees around you. Asp caterpillars are often on the underside of leaves.
  • Protect Yourself: Wear gloves and long sleeves before touching them to avoid their venomous spines.
  • Remove by hand: Gently pick them off and put them in soapy water to drown. Don’t crush them, as it can release more venom.
  • You can use a stick:  If you’re uncomfortable picking them off by hand, use a stick or tool to knock them into a container.
  • Spray with insecticide: For severe infestations, use an insecticide made for caterpillar control. Follow the instructions and avoid spraying near water or edible plants.
  • Trim the affected plants: If the asp caterpillars are on a small plant or tree, trim the affected parts and dispose of them properly.
  • Monitor and repeat: Keep an eye on your plants and trees for any signs of asp caterpillars and repeat the removal process if needed.


Frequently Asked Questions

Q. What is another name for ASP caterpillar?
A. The asp caterpillar is also known as the puss caterpillar due to its resemblance to a clump of fur or cotton.

Q. Is an asp caterpillar also called puss?
A. Yes, the asp caterpillar is commonly referred to as the puss caterpillar.

Q. What is the green liquid coming out of caterpillars?
A. The green liquid that may come out of caterpillars is believed to be regurgitated plant material or digestive fluids.

Q. What medicine treats caterpillar rash?
A. You can treat caterpillar rash or dermatitis, with over-the-counter antihistamines and corticosteroid creams to reduce itching and inflammation. If yours is severe, consult a doctor who to prescribe stronger medications.

Q. Which caterpillar has the most painful sting?
A. The asp caterpillar, also known as the puss caterpillar, is considered to have one of the most painful stings among caterpillars.

Q. What is the best homemade caterpillar killer?
A. A mixture of dish soap and water sprayed directly on caterpillars can be an effective homemade caterpillar killer. You can also use diatomaceous earth or neem oil.

Q. What kills most caterpillars?
A. Insecticides specifically designed for caterpillar control are effective at killing most caterpillar species. Remember to use them with caution and according to the manufacturer’s instructions.

Q. Does an Asp Have Venom?
A. Yes, asp caterpillars have venomous spines that can deliver a painful sting. This venom can cause a range of symptoms, including swelling, itching, and even nausea in some cases.


Read also: Caterpillars Have How Many Legs?



Asp caterpillars may look harmless, but their venomous sting can cause significant pain and discomfort.

It’s important to know how to spot and safely remove these caterpillars, especially if you live in an area where they are common.

Follow the advice in this article, to effectively deal with asp caterpillars and make your environment safer for everyone.

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