Metarhizium anisopliae spores are microscopic, infectious spores of a fungus that can be used as a biological insecticide to control a variety of pests:
How they work
The spores attach to the cuticle of an insect host, and enzymes produced by the fungus break down the cuticle and allow the fungus to grow inside the insect. The fungus then produces toxins that kill the insect.
How they are used
Metarhizium anisopliae spores are typically sprayed on affected areas. They can be used to control pests such as whiteflies, mites, weevils, thrips, and termites.
How to apply
Metarhizium anisopliae spores can be applied as a foliar spray or mixed into soil. For foliar spraying, mix 1 kg of spores with 150–200 liters of water and spray on both sides of the leaves in the evening. For soil application, mix 2 kg of spores with 150–200 kg of FYM, add some water for moisture, cover with a polythene sheet, remix after 4 days, and cover again.
Other considerations
Metarhizium anisopliae does not appear to infect humans, but it can be a significant pathogen of reptiles. The speed at which the fungus kills an insect depends on the number of spores that come into contact with the insect, the insect’s age, susceptibility, and environmental conditions
