Metarhizium is a fungal insecticide, and the active ingredient of Metarhizium is conidia. After the conidia contact and attach to the insect body, the spores first germinate and penetrate the insect body wall.
Then they invade the body, grow and reproduce rapidly in the blood wave of the insect body, seize the nutrients and tissues in the insect body, weaken it, and stop feeding.
In the later stage, the fungus will also secrete toxins, affect the central nervous system of the pest, destroy various organs, dehydrate the tissues, and cause death.
The hyphae of Metarhizium in the dead insect can extend out of the body through the intersegmental membrane and produce conidia. The conidia can continue to infect other pest individuals through contact transmission or wind spread, forming repeated infection in the pest population.
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