What is the name of the fungus that acts as a significant natural biological control agent against the caterpillars?

Answer

Entomophaga maimaiga

The fungus Entomophaga maimaiga is a natural enemy capable of causing widespread caterpillar death, especially when environmental conditions are damp.

What is the name of the fungus that acts as a significant natural biological control agent against the caterpillars?
insectmothpestDefoliator