Natural Pesticides for Soil Mites

Diatomaceous Earth

• Diatomaceous earth is a naturally occurring silica-rich rock that crumbles easily into a fine powder. Though it feels smooth to human touch, the rock particles are rough and sharp to small organisms. This pesticide works by puncturing and slicing apart the exoskeleton. As a result, the mite rapidly dries out and dies. Diatomaceous earth is readily available at most garden supply stores. Sprinkle the powder on the surface of the affected area. Mix in as much as possible without disturbing the plant roots.

Predator Mites

• Soil mites can be effectively controlled by introducing predatory mites to the soil. They can be purchased from greenhouse and specialty garden supply stores. They are usually packaged using vermiculite as a carrier. As soon as you receive them, lightly mist the affected plant. Then, open the container and shake the contents on the soil around the affected plants. If you wait too long, the mites may run out of food within the container and die. Mist the plants again a few days later to provide the humid conditions your predatory mites need to thrive.

Spinosad

• Spinosad is a broad spectrum organic pesticide. It is made from two compounds produced by soil microbes. Spinosad is toxic to a wide range of insects but is relatively non-toxic to mammals and aquatic species. It is only effective when ingested or still wet, making it a suitable choice when you are trying to target a specific area or pest for a set period of time.

Garlic/Detergent Solution

• Another natural deterrent for soil mites is a garlic and detergent solution that's applied to the soil during irrigation. Grind four large cloves of garlic and mix with water in a plastic gallon jug. Leave the jug in the sun for five days. Then strain the liquid and add six drops of liquid detergent. Mix 1/4 cup of this solution per gallon of water and water the affected soil.