Capsaicin is the main chemical that makes chili peppers hot. Capsaicin is an animal repellent that is also used against insects and mites. Capsaicin was first registered for use in the United States in 1962. The U.S. Environmental Protection Agency (U.S. EPA) considers it to be a biochemical pesticide because it is a naturally occurring substance.
Mode of Action：
Capsaicin is very irritating to the skin and eyes, and it causes swelling in lung tissue. It can also irritate the mucous membranes in the mouth. In insects and mites, it appears to damage membranes in cells and disrupt the nervous system.
Application as bio-insecticide:
In pesticides, it is used as a green insecticide for aphids, cabbage worms, diamondback moths, armyworms, leafhoppers, thrips, whiteflies, nematodes, etc.
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