Toxicity tests of Azadirachtin and Verticillium lecanii to Amblyseius cucumeris Oudemans
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摘要: 分别测定定了0.3%印楝素乳油、蜡蚧轮枝菌对天敌胡瓜钝绥螨的毒性.施药后10d 的观察结果,0.3%印楝素乳油直接喷于胡瓜钝绥螨虫体时毒性很小,药后10d的 LC50为5.01mg·L-1,回归线性方程 y=1.2294x+0.5260;胡瓜钝绥螨取食用0.3%印楝素乳油处理过的柑桔全爪螨则无中毒表现,即无毒性;蜡蚧轮枝菌对胡瓜钝绥螨寄生率为0,基本无毒性,故释放胡瓜钝绥螨生防园可采用0.3%印楝素乳油和蜡蚧轮枝菌防治茶小绿叶蝉、柑桔害螨、柑桔粉虱、蚧壳虫、蚜虫等害虫,既能有很好的防效又能保护天敌胡瓜钝绥螨。Abstract: The toxicity of 0.3% Azadirachtin emulsion comentration and Verticillium lecanii to Amblyseius cucumeris Oudemans were tested.The results showed that 0.3% Azadirachtin emulsion comentration had some toxicity to Amblsyseius cucumeris Oudemans.The LC50 to Amblyseius cucumeris Oudemans was 5.01 mg·L-1 regression linear equation was y=1.2294x+0.526.But it showed no toxicity to Amblyseius cucumeris Oudemans after Amblyseius cucumeris Oudemans eat the citrus spider mite that were treated by 0.3% Azadiraehtin.And Verticillium lecanii also had no toxicity to Amblyseius cucumeris Oudemans.So adopting 0.3% Azadirachtin and Verticillium lecanii to control green leaf hopper,citrus pest mite,citrus white fly.citrus scale,aphid and other pests.not only acquirc better control effects but also protect the natural enemies—Amblyseius cucmeris Oudemans.
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Key words:
- Azadirachtin /
- Vertictllum lecanii /
- Amblysetus cucumeris Oudemans /
- Toxicity determimng
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[1] 钟平.印楝杀虫剂的杀虫作用和机理[J].植物保护,1995,21(5):30-32. [2] 李国霞,严毓骅,王丽英.蜡蚧轮枝菌11个单孢菌株的生物学及其对温室白粉虱致病性的比较和筛选[J].中国农业大学学报,1996,1(1):83-88.
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