Utilization of the green muscardine fungus, Metarhizium anisopliae (Metsch) Sorokin, as biological control agent against the brown planthopper, Nilaparvata lugens Stal (Homoptera: Delphacidae)

Issue Date

10-2012

Abstract

Bioassay tests revealed that green muscardine fungus isolate Ma. SPW was pathogenic to the brown planthopper (BPH) Nilaparvata lugens causing 60-67% mortality in 7 days both under laboratory and screenhouse conditions. The insects started to succumb to infection of the fungal pathogen at 3-4 days post treatment and increased with time. The conidia applied on the rice seedlings were observed to infect the brown planthoppers infesting the host plants. Morality was highest (92%) when the fungal suspension was sprayed at the base of the rice seedlings; followed by the mixing of the fungal suspension with the irrigation water (88%) and, the spraying of fungal suspension on the canopy of the rice seedlings (74%) in the first trial. However, in the second trial, incorporation of the fungal suspension on the irrigation water gave 94% mortality. In both trials, rice seedlings sprayed with insecticide resulted in 46% mortality of the test insects.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

26

Issue

2

Page

193

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

METARHIZIUM ANISOPLIAE; NILAPARVATA LUGENS; PLANT PESTS; CONIDIA; BIOLOGICAL CONTROL AGENTS; MORTALITY

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