Selection of Metarhizium anisopliae (Metsch.) Sorok. isolates for virulence toward four insect pests

Abstract

The virulence of 14 isolates of Metarhizium anisopliae (Metsch.) Sorok. from soil and diseased insect hosts was determined against 4 representative insect pest species in the laboratory. Only one isolate from soil was highly virulent to Ostrinia furnacalis (Guenee) larvae. Several isolates, originally from lepidopteran, homopteran and coleopteran hosts were highly infective to Dysdercus cingulatus (Fabr.) nymphs indicating their ability to cross-infect species of other insect orders. The isolates from soil were as virulent to D. cingulatus nymphs as those from insects. All isolates were avirulent to Spodoptera litura (Fabr.) larvae and Epilachna vigintioctopunctata (Fabr.) grubs, suggesting the innate resistance of these insects to the fungus.

Source or Periodical Title

Philippine Agricultural Scientist

ISSN

317454

Page

59-66

Document Type

Article

Subject

Biological control, Cross-infectivity, Dysdercus cingulatus, Epilachna vigintioctopunctata, Isolate selection, Metarhizium anisopliae, Ostrinia furnacalis, Spodoptera litura

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