As the germ tube penetrates the epicuticle layer of insect’s integument, it starts forming a plate-like structure called penetration plate.
The penetration plate further produces secondary hyphae, which cross the epidermal layer and reach into the haemocoel of insect’s body.
From these hyphae, protoplast bodies bud off and start circulating into the insect’s haemocoel. Fungus now starts growing into a filamentous mode invading internal organs and tissues of the host.