Prospects of using Metarhizium anisopliae to check the breeding of inspect pest,Oryctes rhinoceros L. in coconut leaf vermicomposting sites
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Date
2005-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
During vermicomposting of coconut leaves by the earthworm Eudrilus sp., Oryctes rhinoceros L. (rhinoceros beetle), an insect pest of palms, was found to breed in the decomposing organic material. Metarhizium anisopliae var. major was tried as a biocontrol agent for management of this pest. The effect of pathogen at spore loads of 103, 104 and 105 per 10 g of substrate was tested in laboratory on Eudrilus sp. kept with O. rhinoceros grubs and on Eudrilus sp. alone for the pathogenic capability of the fungus on the pest and its possible toxicity towards the vermin. The efficacy of the entomopathogen was also tested in the field in vermicomposting tanks. In laboratory bio-assay, 100% mycosis of O. rhinoceros grubs could be obtained while the entomopathogen had no toxic effect on the earthworms. There was a positive change in the number and weight of the earthworms on treatment with M. anisopliae. In the field, application of M. anisopliae reduced O. rhinoceros grubs in the vermicomposting tanks upto an extent of 72%. In conclusion, M. anisopliae could effectively control O. rhinoceros in vermicomposting sites and was non-hazardous to the vermicomposting process as well as the Eudrilus sp.
Description
Keywords
Coconut palm, Earthworms, Eudrilus sp., Metarhizium anisopliae, Oryctes rhinoceros, Vermicomposting
Citation
Bioresource Technology 97 (2006) Pages 1801-1806