The tea geometridEctropis obliquais one of the most serious leaf-feeding insect pests in tea （Camelia sinensis） in East Asia. Although several volatile chemicals emitted from tea plants have been reported to be attr...The tea geometridEctropis obliquais one of the most serious leaf-feeding insect pests in tea （Camelia sinensis） in East Asia. Although several volatile chemicals emitted from tea plants have been reported to be attractive toE. obliqua moths, no synthetic attractants for E. obliqua moths have been developed. By measuring the behavioral responses of the moth to a series of chemicals in the lab, we found that a blend containing a ternary mixture containing （Z）-3-hexenal, （Z）-3-hexenyl hexanoate and benzyl alcohol clearly attracted toE. obliqua moths of both sex and that （Z）-3-hexenyl acetate could enhance the attractiveness of the ternary blend. Moreover, we found that the volatiles emitted from the plant-E. obliqua larva com-plex have the same attractiveness as： 1） the blend of volatiles containing the ternary mixture and 2） the blend containing （Z）-3-hexenyl acetate plus the ternary mixture to both male and female moths. In a ifeld bioassay, more male moths were observed on traps that were baited with the blend containing （Z）-3-hexenyl acetate plus the ternary mixture than on control traps. Our study raises the tantalizing possibility that synthetic blends could be deployed as attractants for pests in the ifeld.展开更多
基金sponsored by the Special Fund for Agro-scientific Research in the Public Interest, China (201403030)the National Basic Research Program of China (2012CB114104)+1 种基金the National Natural Science Foundation of China (31272053)the Division of Science and Technology of Zhejiang Province, China (2015C32081)
文摘The tea geometridEctropis obliquais one of the most serious leaf-feeding insect pests in tea （Camelia sinensis） in East Asia. Although several volatile chemicals emitted from tea plants have been reported to be attractive toE. obliqua moths, no synthetic attractants for E. obliqua moths have been developed. By measuring the behavioral responses of the moth to a series of chemicals in the lab, we found that a blend containing a ternary mixture containing （Z）-3-hexenal, （Z）-3-hexenyl hexanoate and benzyl alcohol clearly attracted toE. obliqua moths of both sex and that （Z）-3-hexenyl acetate could enhance the attractiveness of the ternary blend. Moreover, we found that the volatiles emitted from the plant-E. obliqua larva com-plex have the same attractiveness as： 1） the blend of volatiles containing the ternary mixture and 2） the blend containing （Z）-3-hexenyl acetate plus the ternary mixture to both male and female moths. In a ifeld bioassay, more male moths were observed on traps that were baited with the blend containing （Z）-3-hexenyl acetate plus the ternary mixture than on control traps. Our study raises the tantalizing possibility that synthetic blends could be deployed as attractants for pests in the ifeld.
文摘从浙江省余杭县茶试场、余杭区茶场、杭州市茶试场等地的茶尺蠖幼虫罹病虫体上分离到镰孢属真菌91个分离物,经鉴定属于2个种和1个变种,即串珠镰孢(Fusarium moniliformeSheldon),串珠镰孢胶孢变种(F.moniliforme var.subglutinans Wollenw.et Reink.)和半裸镰孢(F.semitectum Berk et Rav)。前一种分离频率高,是余杭茶尺蠖幼虫真菌流行病的病原优势种。接种试验证明,3种镰刀菌对茶尺蠖幼虫皆有致病性,其中以串珠镰孢致病力最强,串珠镰孢胶孢变种次之,半裸镰孢较弱。主要致病菌——串珠镰孢的杀虫谱测定结果表明,该菌对茶尺蠖、菜青虫、萝卜蚜、桃蚜、红蜡蚧和日本龟蜡蚧均有一定的致病力,但接种家蚕未获得成功。文中还对镰孢属李瑟组的分类进行了讨论。
