ABSTRACT
Biological control using microbial pesticides has become important in recent years. Introduced microbial biocontrol agents (as opposed to a natural population of microbes) are called “microbial pesticides” according to the Environmental Protection Agency (EPA) (Harman, 2000). Several microbial pesticides are now commercially available. Fungal, bacterial, and viral biocontrol agents are available. They effectively control fungal, bacterial, and viral diseases. Modes of action of these biocontrol agents are described. Conditions favorable for effective action of them in controlling diseases are also discussed.
