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Does DE Kill Chiggers?

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Chiggers, also known as Trombiculidae, are tiny mites that cause intense irritation, itching, and dermatitis when they bite humans and animals. These pests are often found in forests, grasslands, tall grass, weeds, and the edges of woodlands. Controlling chiggers is essential to prevent their annoying and potentially harmful bites. One natural method that has been suggested for chigger control is diatomaceous earth (DE). But does DE really kill chiggers? Let’s delve into this topic.


Yes, diatomaceous earth (DE) does kill chiggers. It is a natural, non-toxic substance that can cause dehydration and death in chiggers by either cutting into their exoskeletons or preventing their bodily fluids from circulating properly. However, it’s important to use it responsibly and take necessary safety precautions to protect yourself and your family.

What are Chiggers?

Chiggers are tiny, six-legged wingless organisms that mature into a type of mite. They are often confused with jiggers, which are a type of flea. In their larval stage, chiggers bite humans and animals, causing severe itching, red pimple-like bumps, or hives. The intense irritation and subsequent scratching may result in secondary infections. In some cases, chigger bites can lead to complications such as secondary cellulitis and summer penile syndrome. However, chiggers in North America are not known to transmit any human diseases.

Understanding Diatomaceous Earth (DE)

Diatomaceous Earth (DE) is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 mm to less than 1 μm, but typically 10 to 200 μm. DE consists of the fossilized remains of diatoms, a type of hard-shelled microalgae. The typical chemical composition of oven-dried diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clay minerals), and 0.5–2% iron oxide.

Does DE Kill Chiggers?

Yes, diatomaceous earth (DE) can be used specifically to kill or deter chiggers. DE is a natural, non-toxic product made from fossilized remains of diatoms, which are microscopic algae with hard shells. When chiggers come into contact with DE, it can cause dehydration and death by either cutting into their exoskeletons or preventing their bodily fluids from circulating properly.

How to Use DE for Chigger Control

To properly use diatomaceous earth (DE) to combat chiggers, follow these steps:

  1. Purchase food-grade DE: Food-grade DE is safe for humans, pets, and beneficial insects.
  2. Apply DE to your yard: Sprinkle a small amount of DE around the perimeter of your yard and over any areas where chiggers are likely to be present.
  3. Use DE on clothing: Dust a little food-grade DE on the bottom of your clothes, especially around your ankles and waist, to repel chiggers.
  4. Reapply DE after rain: DE is most effective when it’s dry, so you may need to reapply it after rain or watering your lawn.
  5. Take safety precautions: While using DE, wear a breathing mask or another type of covering for your nose and mouth to avoid inhaling the dust.

Potential Risks or Downsides to Using DE

While DE is a natural and effective solution to chigger control, there are some potential risks and downsides. Inhaling a large amount of DE may cause coughing and/or shortness of breath, and it can also cause skin irritation and dryness. Also, DE can be messy to apply, as the powder can become airborne and settle on surfaces.

Other Methods to Control Chiggers

Apart from DE, there are other effective methods for chigger control. Regular lawn maintenance, using insecticides, natural remedies like apple cider vinegar, and professional pest control services can all be effective ways to manage a chigger problem.


In conclusion, DE does kill chiggers and can be an effective part of your pest control strategy. However, it’s important to remember that DE is only one method of chigger control. It’s also essential to maintain your lawn, use insect repellents, and take other personal precautions to prevent chigger bites. Always remember to use DE responsibly and take necessary safety precautions to protect yourself and your family.

Frequently Asked Questions

What are some signs of a chigger infestation?

Some signs of a chigger infestation include intense itching, red pimple-like bumps, or hives on the skin. These symptoms usually appear after spending time in outdoor areas with tall grass, weeds, or woodlands where chiggers are commonly found.

Can I use DE inside my home for chigger control?

Yes, DE can be used inside the home, particularly in areas where you suspect chigger activity. However, be careful to avoid inhaling the powder and keep it out of reach of children and pets.

Does DE kill other types of insects or pests?

Yes, DE is also effective at killing other types of pests, such as bed bugs, fleas, ants, and cockroaches. It works by damaging the exoskeleton of these pests, causing them to dehydrate and die.

How long does it take for DE to kill chiggers?

The exact time can vary, but generally, DE starts to affect chiggers within 48 hours of contact. The chiggers should die within a week of exposure.

Is DE harmful to beneficial insects?

Yes, DE can also harm beneficial insects like bees and butterflies. Therefore, it’s important to apply DE carefully, targeting only the areas where chiggers or other harmful pests are present.

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