Lime as a pest control strategy is among the most used organic pest management methods that gained popularity at the start of the 20th century along with other organic products like mercury salts, sulfur and copper. Lime is widely used as an organic pesticide for the control of agricultural pests.
Lime is a mineral obtained from grinding magnesium or calcium into a fine powder. The main source of the magnesium and calcium is limestone rock. Lime may also be obtained from oyster shells, marls and industrial byproducts. The product is commonly added to soil to increase the pH levels or alkalinity.
Dusting plants with lime controls a wide range of pests. Mixing lime and sulfur produces lime sulfur that is widely used as a dormant spray for control of pests like eriophyid mites, scale and thrips.
Lime sulfur comes in a liquid form and is used to spray trees and plants. The mixture also has fungicidal properties and effectively kills newly germinated fungal spores, helping to control a number of fungal diseases including anthracnose and mildew. You can use powder lime to dust your plants as frequently as required using a window screen or strainer.