bassiana

Beauveria bassiana is a fungus in the genus Beauveria, an entomopathogenic ascomycete widely used as a biological control agent against pest insects. It occurs in soil, on decaying vegetation, and on insects worldwide.

Life cycle and infection: Its spores (conidia) attach to the insect cuticle, germinate, and penetrate through enzymatic degradation and mechanical pressure. The fungus colonizes the hemolymph, kills the host, and produces new conidia on the cadaver, which disseminate to infect additional hosts.

Host range and ecology: It has a broad host range among arthropods, including many pest Lepidoptera, Coleoptera, and some Diptera and mites. Efficacy depends on humidity, temperature, UV exposure, and host species. It is generally nonpathogenic to most plants and mammals, and environmental persistence varies.

Applications: Commercially produced as biopesticides for greenhouse and field use, in formulations such as wettable powders, granules, and oil suspensions. Widely marketed under trade names such as BotaniGard, Mycotrol, and Naturalis, among others. It is integrated into integrated pest management programs and compatible with certain other control methods.

Safety and regulation: Beauveria bassiana is considered safe for humans and most non-target organisms when used as directed, though it can cause opportunistic infections in severely immunocompromised individuals. Proper handling and adherence to label instructions are advised. Regulatory status varies by country.