There are many entomopathogenic fungi available like Metarhizium, Beauveria , Verticillium which are used for control of several insects. It is apparent that these fungi do not establish well in the crop ecosystem, thus giving low level control of insects. Is there any way to keep these fungi thrive in the crop ecosystem. And what are the factors that affect the survival of these fungi in crop ecosystem. Sustained multiplication of these pathogens in crop ecosystem till the end of crop life cycle is very crucial. How do we ensure this?