The inhibitory mechanism of Paecilomyces lilacinus on root-knot nematodes is that after Paecilomyces lilacinus contacts with nematocyst oocysts, in the viscous matrix, the hyphae of the biocontrol bacteria surround the whole egg, and the ends of the hyphae become thicker.
Metabolites and the activity of fungal chitinases rupture the eggshell surface, which is subsequently invaded by fungi and replaced. It can also secrete toxins to kill nematodes.
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