刘慧平, 韩巨才, 徐琴, 刘慧芹. 杀虫剂对甘蓝蚜与七星瓢虫的毒力及选择性研究[J]. 中国生态农业学报(中英文), 2006, 14(3): 160-162.
引用本文: 刘慧平, 韩巨才, 徐琴, 刘慧芹. 杀虫剂对甘蓝蚜与七星瓢虫的毒力及选择性研究[J]. 中国生态农业学报(中英文), 2006, 14(3): 160-162.
LIU Hui-Ping, HAN Ju-Cai, XU Qin, LIU Hui-Qin. Toxicity and selection of insectivides to Coccinella septempunctata(L.)and Brevicoryne brassicae(L.)[J]. Chinese Journal of Eco-Agriculture, 2006, 14(3): 160-162.
Citation: LIU Hui-Ping, HAN Ju-Cai, XU Qin, LIU Hui-Qin. Toxicity and selection of insectivides to Coccinella septempunctata(L.)and Brevicoryne brassicae(L.)[J]. Chinese Journal of Eco-Agriculture, 2006, 14(3): 160-162.

杀虫剂对甘蓝蚜与七星瓢虫的毒力及选择性研究

Toxicity and selection of insectivides to Coccinella septempunctata(L.)and Brevicoryne brassicae(L.)

  • 摘要: 试验研究杀虫剂对甘蓝蚜及其天敌七星瓢虫幼虫的毒力及选择性结果表明,15种供试杀虫剂中以吡虫啉对七星瓢虫幼虫和甘蓝蚜的选择性最高,其选择性毒力比值(瓢虫LD50/甘蓝蚜LD50)为174.29。5种有机磷 类杀虫剂中以马拉硫磷的选择性最高,其次为敌敌畏,其选择性毒力比值分别为35.73和25.32;7种菊酯类杀虫剂中以氟氯氰菊酯和氯氰菊酯的选择性最高,其选择性毒力比值分别为55.16和30.00。故吡虫啉、氟氯氰菊酯和马拉硫磷等选择性较高的杀虫剂对甘蓝蚜相对毒力高,而对其天敌瓢虫相对安全,为防治菜田甘蓝蚜的理想品种。

     

    Abstract: The toxicity and selection of insecticides to Coccinella septempunctata(L.)and Brevicoryne brassicae(L.)are studied.The results show that the selective toxicity of imidacloprid is the highest among 15 insecticides tested,and the selective toxicity ratio (STR,ladybird LD50/aphid LD50)reaches 174.29.Among 5 organophosphorus insecticides,malathion shows the highest selec tivity,and the second is dichlorvos,their STRs are 35.73 and 25.32,respectively.Cyfluthrin and cypermethrin among 7 pyrethroid insecticides possess the highest selective toxicity for the aphid to the ladybird, the STRs are 55.16 and 30.00,respectively.Therefore the high selective insecticides, such as imidacloprid,cyfluthrin and malathion,not only possess the high toxicity to aphid,but also are safe for the natural enemy,ladybird,and are relatively ideal insecticides for controlling aphids in the field.

     

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