蜡蚧轮枝菌VL17菌株代谢产物对桃蚜若蚜的室内毒力  

Laboratory toxicity of metabolic products from Verticillium lecanii VL17 strain to nymphs of Myzus persicae

作　　者：纪明山[1] 王瑞雪[1] 谷祖敏[1] 辛鑫[1] 

机构地区：[1]沈阳农业大学植物保护学院,沈阳110161

出　　处：《植物保护》2010年第2期139-140,172,共3页Plant Protection

基　　金：国家科技支撑计划项目(2006BAD07B02)

摘　　要：蜡蚧轮枝菌(Verticillium lecanii)VL17菌株液体发酵滤液,经乙酸乙酯萃取并旋转蒸发后,获得粗毒素。采用浸渍法测定粗毒素对桃蚜(Myzus persicae)的毒力。结果表明:0.375mg/mL粗毒素对桃蚜若蚜的LT50为8.3821d,随浓度增加其杀虫速度加快;处理试虫第3天,粗毒素对桃蚜若蚜的LC50为3.9661mg/mL,随处理时间延长其毒力增强。Crude toxic was obtained from culture filtrate of Verticillium lecanii VL17 strain by extracted with ethyl acetate and evaporation. Activity of the crude toxic to nymphs of Myzus persicae was tested with dipping method. The results indicated that the LTs0 reached to 8. 382 1 d when the concentration of crude toxic was 0. 375 mg/ mL, and the LT50 value was declined with increasing crude toxic concentrations. Three days after treated by the crude toxic, the LT50 was 3. 966 1 mg/mL, and the toxicity of the crude toxic increased with extending treatment time.

关 键 词：蜡蚧轮枝菌 桃蚜 代谢产物 毒力 

分 类 号：S476.12[农业科学—农业昆虫与害虫防治]