Jas Bessi, botanical name Beauveria bassiana is a naturally occurring entomopathogenic fungus in most part of the world. The spore of this fungus when comes in contact with the cuticle (skin) of the target insect pest they germinate and grow directly through the cuticle to the inner body of the host. The fungus draining the nutrients from insect body, eventually killing it in about 48-72 hours after spray.