First, After physical contact between a fungal spore and the insect cuticle.
Second, Recognition of the host by the fungus leads to spore germination and production of a penetration structure, the appressorium
Third, which grow a penetration peg and a series of hyphal bodies to cross the cuticle and epidermis.
Fourth, Ones inside the insect, the fungus produces blastospores that bud and spread though the hemolymph.