Attempts at controlling Teak Defoliator (Hyblaea puera Cramer, Lepidoptera, Hyblaeidae) with the entomopathogenic fungus, Metarhizium anisopliae (Metsch.): laboratory, nursery and field trials

Remadevi , OK and Sapna Bai, N and Sasidharan, TO and Balachander, M and Dharma Rajan, Priyadarsanan (2013) Attempts at controlling Teak Defoliator (Hyblaea puera Cramer, Lepidoptera, Hyblaeidae) with the entomopathogenic fungus, Metarhizium anisopliae (Metsch.): laboratory, nursery and field trials. International Journal of Pest Management, 59 (3). pp. 236-242. ISSN 0967-0874

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Abstract

Defoliator pests often cause severe damage to commercially valuable timber trees, such as teak, grown in plantations, affecting the quality and quantity of the wood produced. Twenty-five isolates of an entomopathogenic fungus, Metarhizium anisopliae (Metsch.), derived from different forest habitats were tested for their efficacy against the Teak Defoliator, Hyblaea puera Cram. The median lethal concentration (LC50) for the isolates ranged from 0.65 to 947.41 × 105 conidia mL−1. Four isolates, viz. MIS2, MIS19, MIS7 and MIS1, were promising, having low LC50 values. A median lethal time (LT50) of 3.8 d was recorded for the isolates MIS2 and MIS7 when the moth larvae were exposed to a spore load of 107 conidia mL−1. Formulations composed of “MIS2 + MIS7 + 0.5% Pongamia pinnata seed oil” and “MIS2 + MIS7” proved to be superior against the Teak Defoliator, causing 94.73% and 93.93% mortality, respectively. Application of the formulation “MIS2 + MIS7 + 0.5% P. pinnata oil” resulted in 63.6% and 56.2% reduction in infestation in nurseries and plantations, respectively, while the formulation “MIS2 + MIS7” recorded 56.18% and 51.60% reduction. Our results indicate that M. anisopliae formulations could be an effective means of managing Teak Defoliator in plantations, particularly when combined with P. pinnata oil.

Item Type: Article
Additional Information: Copyright of this article belongs to Taylor & Francis
Uncontrolled Keywords: biocontrol; entomopathogens; Hyblaea puera; Metarhizium anisopliae; teak
Subjects: C Publications by ATREEians > G Journal Papers
Divisions: Publications by ATREEians > Journal Papers
Depositing User: Users 103 not found.
Date Deposited: 05 Dec 2016 06:19
Last Modified: 05 Dec 2016 06:19
URI: http://eprints.atree.org/id/eprint/327

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