Vinayaga Moorthi P, Balasubramanian C, Selvarani S, Radha A
PG and Research Department of Zoology, Thiagarajar College (Autonomous), Madurai, 625 009 Tamil Nadu India.
Kunthavai Nacchiyar Government Arts College for Women (Autonomous), Thanjavur, India.
Springerplus. 2015 Nov 6;4:681. doi: 10.1186/s40064-015-1437-1. eCollection 2015.
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.
在本研究中，对昆虫病原真菌玫烟色棒束孢、球孢白僵菌和拟青霉的亚致死浓度次生代谢产物对斜纹夜蛾取食、生长、繁殖力和孵化率的影响进行了研究。用玫烟色棒束孢和球孢白僵菌代谢产物处理的斜纹夜蛾表现出取食量减少。用玫烟色棒束孢代谢产物处理的斜纹夜蛾生长速率急剧下降。就近似消化率（AD）而言，玫烟色棒束孢分离株的影响最大，它显著降低了四龄和五龄幼虫的近似消化率。用玫烟色棒束孢代谢产物处理的斜纹夜蛾三龄幼虫的消化食物转化率（ECD）和摄入食物转化率（ECI）值显著低于四龄和五龄幼虫。然而，代谢产物对斜纹夜蛾繁殖力和孵化率的影响很大。因此，玫烟色棒束孢的代谢产物可能是可靠的生物防治剂，强烈推荐用于经济作物中斜纹夜蛾的防治。
