几种杀虫剂与印楝素对四种作物蚜虫的相对毒性研究

M. Khalequzzaman, J. Nahar
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引用次数: 15

摘要

采用间接施用法测定5种杀虫剂的毒性;分别对大豆、茄子、土豆和菜花上饲养的4种主要作物害虫蚜虫,即马拉硫磷、克硫丹、cymbush、吡虫啉和印楝素进行了抑虫试验。采用残膜技术,将经检测蚜虫的蔬菜叶片带入实验室。马拉硫磷对松果蚜、棉蚜、桃蚜和桃蚜的lc50分别为327.97、333.92、305.26和313.77 μ g cm -2,毒性最小。氯氰菊酯对上述蚜虫的lc50分别为12.55、12.29、12.55和12.10 μ g cm -2,毒性最强。氯磺胺和吡虫啉毒性中等。印楝素是一种天然植物源杀虫剂,其毒性最强,对裂花姬螨的lc50为0.41 μ g cm -2,对棉姬螨的lc50为0.34 μ g cm -2,对桃蚜和erysimi的lc50均为0.44 μ g cm -2。关键词:杀虫剂,毒性,印楝素,紫蚜,棉蚜,桃蚜,紫唇蚜Â doi:10.3329/ujzru.v27i0.1950Rajshahi university . Vol. 27, 2008 pp. 31-34
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Relative toxicity of some insecticides and azadirachtin against four crop infesting aphid species
Indirect application was used to assay the toxicity of five insecticides; viz. malathion, carbosulfan, cymbush, imidacloprid and azadirachtin against four important crop infesting aphid species, Aphis craccivora Koch , Aphis gossypii Glover , Myzus persicae (Sulzer) and Lipaphis erysimi (Kaltenbach), reared on bean, brinjal, potato and cauliflower plants respectively. Residual film technique was applied by bringing leaves with tested aphids of the vegetable plants in the laboratory. Malathion was the least toxic to all aphids having LC 50 as 327.97, 333.92, 305.26 and 313.77 I¼g cm -2 for A. craccivora, A. gossypii, M. persicae and M. persicae respectively. Cypermethrin was the most toxic showing LC 50 as 12.55, 12.29, 12.55 and 12.10 I¼g cm -2 in the above mentioned species of aphid respectively. Carbosulfan and imidacloprid showed moderate toxicity. Azadirachtin as a natural plant origin insecticide proved to be the most toxic having LC 50 as 0.41 I¼g cm -2 for A. craccivora , 0.34 I¼g cm -2 for A. gossypii and 0.44 I¼g cm -2 for both M. persicae and L. erysimi. Key words: Insecticide, toxicity, azadirachtin, Aphis craccivora, Aphis gossypii, Myzus persicae, Lipaphis erysimi   doi:10.3329/ujzru.v27i0.1950 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 31-34
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