Attachment – Spores of B. bassiana attach to the insect body and germinate.
Penetration – Fungal hyphae through enzymatic action break the insect cuticle and penetrate the insect body.
Multiplication – The fungus obtains nutrients from the insect and multiplies inside the insect, destroying internal tissues.
Death – The insect reduces its feeding and mobility and eventually dies after 3-5 days, depending on insect species, age, and conidial dose.
Spore emergence – After insect death, spores emerge through the cuticle forming a white covering around the insect cadaver.
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