Effect of Entomopathogenic Fungi on the Survival of the Lepidopteran Helicoverpa Armigera

Abstract

Entomopathogenic fungi infect insects in a way that includes a series of events and depends on various factors. After the infection, the fungus initiates a variety of procedures in order to grow, resulting in a disturbation of the regular functions of the host until its death. This study focuses on the effect of three fungal species on the survival of Lepidoptera Helicoverpa armigera in vitro. Our results clearly depict a dose-dependent mortality rate against the lepidopteran larvae.

Effect of Media on Virulence and Enzyme Activity of Pandora neoaphidis Isolate Pd105 from Thailand to Lipaphis erysimi and Myzus persicae

“…Spore suspension of the fungus was prepared from each 20 days old cultured by scraping the fungal materials (spore and hypha) from the surface of the agar and suspended in 10 ml sterile distilled water containing nonionic surfactant, 0.02% Tween 80. Spores were counted using hemocytometer and concentration of the spores was adjusted to 10 10 spores/ml according to [32]- [34] using sterile distilled water containing nonionic surfactant, 0.1% solvent Tween 80 concentration [35]- [36].…”