Relative toxicity of insecticides to Laodelphax striatellus (Fallén) (Homoptera: Delphacidae) and the resistance of field populations from different areas of East China.
Relative toxicity of insecticides to Laodelphax striatellus (Fallén) (Homoptera: Delphacidae) and the resistance of field populations from different areas of East China.
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发表时间：
2008
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通讯作者：
W. Lihua;Fang Jichao;Liu Baosheng
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作者：
W. Lihua;Fang Jichao;Liu Baosheng
用浸秧法测定了中国东部7个典型生态点的6类11种杀虫剂对3龄若虫的相对毒力指数及若虫对10种杀虫剂的抗药性。结果表明，以乙酰甲胺磷为参照标准，11种杀虫剂中乙酰甲胺磷的毒力最低，其他10种杀虫剂对3龄若虫的相对毒性由大到小依次为氟虫腈、扑灭净、阿维菌素、甲氰菊酯、氯氰菊酯、敌敌畏、新亚硝胺类化合物IPP2007年江苏句容、通州、滁州、大丰、南京、苏州和安徽庐江等地的7个田间种群对扑克津表现出极高的抗性，抗性倍数在200倍以上，对高效氯氰菊酯表现出中、高度抗性，抗性倍数为7.8~108.8倍。与2001年在云南楚雄采集的敏感种群相比，2007年江苏句容(JR)、通州(TZ)、滁州(DF)、南京(NJ)、苏州(SZ)和安徽庐江(LJ)的7个田间种群对三唑磷和毒死蜱分别表现出7.7%和12.0倍的抗性CZ、NJ、DF和JR种群对敌敌畏、锐劲特、阿维菌素、吡虫啉、甲硫氧磷和异丙基苯丙胺都表现出5.7~12.6倍的抗性。
Relative toxicity index of 11 insecticides belonging to six different categories against the 3rd-instar nymphs of Laodelphax striatellus(Fallen)and the resistance of the nymphs from 7 typically ecological sites in East China to 10 of these insecticides were surveyed with rice seedlings-dipped method.The results indicated that the toxicity of acephate was the lowest among the 11 insecticides,which was used as reference standard herein.The relative toxicity of the other 10 insecticides to the nymphs in a descending turn was fipronil,buprofezin,abamectin,thiamethoxam,alpha-cypermethrin,IPP(a new nitromethylene-compound),chlorpyrifos,dichlorvos,triazophos and imidacloprid.Compared with Yunnan(YN)susceptible population collected from fields of Chuxiong,Yunnan province in 2001,the 7 field populations respectively from Jurong(JR),Tongzhou(TZ),Chuzhou(CZ),Dafeng(DF),Nanjing(NJ)and Suzhou(SZ)of Jiangsu province and Lujiang(LJ)of Anhui province in 2007 showed very high resistance to buprofezin with the resistance ratio over 200-fold,and medium or high resistance to alpha-cypermethrin with the resistance ratio of 7.8-108.8 fold.The LJ population showed 7.7-and 12.0-fold resistance to triazophos and chlorpyrifos,respectively,and the CZ,NJ,DF and JR populations showed 5.7-12.6-fold resistance to chlorpyrifos.All the 7 field populations of L.striatellus were sensitive to dichlorvos,fipronil,avermectins,imidacloprid,thiamethoxam and IPP.