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Enhancement of the biological activity of nucleopolyhedrovirus through disruption of the peritrophic matrix of insect larvae by chlorfluazuron

文献类型： 外文期刊

作者： Guo, Hui-Fang 1 ; Fang, Ji-Chao 1 ; Liu, Bao-Sheng 1 ; Wang, Jie-Ping 1 ; Zhong, Wan-Fang 1 ; Wan, Fang-Hao 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China; Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100094, Peoples R China

关键词： nucleopolyhedrovirus;chlorfluazuron;Spodoptera litura;Spodoptera exigua;environmental scanning electron microscopy;peritrophic matrix

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

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收录情况： SCI

摘要： The enhancement of Spodoptera litura (F.) nucleopolyhedrovirus (S1NPV) activity using the chitin synthesis inhibitor chlorfluazuron was investigated.When tested against fifth-instar S.litura larvae,chlorfluazuron produced synergistic effects at doses of 0.05 and 0.025 mu g per insect,and additive effects at doses of 0.1 and 0.2 mu g.Furthermore,the time required for SINPV to kill larvae was significantly reduced by chlorfluazuron at all doses tested.The activity and killing speed of Autographa californica (Spey) nucleopolyhedrovirus (AcMNPV) against third-instar Spodoptera exigua (Hubner) larvae were similarly improved by chlorfluazuron at a dose of 0.05 ng per larva.Furthermore,the growth of 5.exigua was significantly retarded by chlorfluazuron.Environmental scanning electron microscopy (ESEM) showed that the peritrophic matrices (PMs) of S.litura exposed to chlorfluazuron alone,or the combination treatment,were markedly disrupted.Obvious ruptures on the outer surfaces of the PM were observed,which potentially facilitated the passage of virions through the matrix.

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