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. 2015 Nov 6:4:681.
doi: 10.1186/s40064-015-1437-1. eCollection 2015.

Efficacy of sub lethal concentration of entomopathogenic fungi on the feeding and reproduction of Spodoptera litura

P Vinayaga Moorthi  1 , C Balasubramanian  1 , S Selvarani  1 , A Radha  2
Affiliations

Efficacy of sub lethal concentration of entomopathogenic fungi on the feeding and reproduction of Spodoptera litura

P Vinayaga Moorthi et al. Springerplus. .

Abstract

In the present investigation, impact of sub lethal concentrations of entomopathogenic fungi, namely Isaria fumosorosea, Beauveria bassiana and Paecilomyces variotii, secondary metabolite on feeding, growth, fecundity and hatchability of Spodoptera litura was performed. The S. litura treated with I. fumosorosea and B. bassiana metabolites exhibited renounced food consumption. The growth rate of treated S. litura with metabolite of I. fumosorosea had drastic reduction. In the case of approximate digestibility (AD), maximum impact was established by the I. fumosorosea isolate, which significantly reduced the approximate digestibility of the IV and V instar larvae. The III instar larvae of S. litura treated with I. fumosorosea metabolite showed significantly lower efficiency of conversion of digested food (ECD) and efficiency of conversion of ingested food (ECI) values than IV and V instars. However the performance of metabolites on fecundity and hatchability of S. litura was immense. Therefore, metabolites of I. fumosorosea could be reliable biocontrol agent, which has been highly recommended for S. litura management in commercial crops.

Keywords: Beauveria bassiana; Growth rate; Isaria fumosorosea; Paecilomyces variotii; Secondary metabolite; Spodoptera litura.

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Figures

Fig. 1
Fig. 1
Impact sub lethal dose of secondary metabolite of Isaria fumosorosea on larvae and pupa and egg of Spodoptera litura. a, b Infected larvae and its enlarged image; c dead larvae; d unhatched eggs and hatched larvae; e pupa (control); f, g, h different type of infected pupa
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