Diatomite , often called diatomaceous earth, is a mineral powder derived from fossilized microscopic algae. It is primarily known for its use against numerous pests and parasites: ants, fleas, bedbugs, mites, cockroaches, moths, lice, ticks, spiders, silverfish, as well as certain garden pests such as aphids, slugs, caterpillars, and snails. This guide explains how to apply it correctly, where to use it, and what precautions to take for effective and controlled use.
1) Understanding how diatomite works
Diatomaceous earth is rich in silicon dioxide, primarily in the form of amorphous silica, depending on the product's quality. Its action is mechanical: the powder is slightly abrasive and causes dehydration of crawling insects. It therefore acts as a contact insecticide, particularly effective when applied in dry areas, along pathways, in cracks, and in corners.
2) Choose the right type of diatomite
Not all diatomaceous earth is created equal. Before purchasing, it is essential to check the grade and intended use:
- Food grade : often chosen for its versatility, to be used strictly according to the labeling.
- Calcined diatomite : intended primarily for filtration, less suitable for domestic use.
- Use for the home or insect repellent : formulation designed for the home and garden.
For indoor use, opt for a fine but low-volatility powder to limit dust.
3) Safety and essential precautions
Although diatomite is often presented as a natural product, certain safety rules must be followed:
- Avoid inhaling dust during application.
- Apply only to dry and ventilated surfaces.
- Keep the product out of reach of children and pets.
- Do not mix with harsh chemicals without clear instructions.
4) The two application methods
Sprinkle
Dusting is the simplest and most effective method against crawling insects. The aim is to deposit a thin, discreet film on strategic areas.
- Baseboards, cracks, corners and nooks.
- Under furniture and behind household appliances.
- Entry points and passage areas for insects.
Spray
Spraying involves mixing the powder with water and then applying the solution to the targeted surfaces. Once the water evaporates, the diatomite remains as a deposit. This method is particularly useful for large surfaces or outdoor areas.
5) Where to use diatomite in the home
Bathroom and toilet
Apply diatomite only in dry areas such as baseboards, behind bathroom fixtures, or under furniture. Avoid any application near textiles or surfaces that come into direct contact with skin.
Kitchen
Treat high-risk areas behind the sink, under furniture, or behind appliances. Apply a thin layer in the corners, then remove any excess after application.
Rooms and textile areas
In the case of bed bugs or mites, apply the powder in cracks, baseboards, and structural areas. Avoid direct contact surfaces and vacuum after treatment.
6) Outdoor uses: garden and vegetable garden
In the garden, diatomite is used as a dry barrier against slugs, snails, and crawling pests. It is applied to the soil around plants and in walkways.
- Reapply after rain.
- Opt for thin, localized deposits.
- Observe the precautions in animal areas such as the chicken coop.
7) Cleaning and maintenance after application
Once the treatment is complete, remove the excess product cleanly:
- Vacuum cleaner for baseboards and crevices.
- Use a slightly damp sponge for hard surfaces.
- Avoid dry sweeping to prevent dispersing dust.
Conclusion
When used correctly, diatomite is an effective and versatile solution for controlling many insect pests in the home and garden. Targeted application to dry areas, with precautions against dust, provides a long-lasting, clean, and safe result.