| 摘要: |
| 陕西棉铃虫对供试的几种常用有机磷杀虫剂未产生明显抗药性。对久效磷而言，杨陵种群表现为低抗，三原种群仍处在耐药性阶段，大荔、渭南种群则处于敏感状态。渭南种群对甲基对硫磷产生了２．８７６６倍的抗药性，而对甲胺磷的抗性倍数仅为０．６４８８倍。马拉硫磷对杨陵、三原、渭南的棉铃虫的ＬＤ50分别为０．２７６９，０．１０６３．０．１２７３μｇ／头。 |
| 关键词: 棉铃虫，有机磷杀虫剂，抗药性 |
| DOI： |
| 分类号:S482.33 |
| 基金项目:陕西省自然科学基金资助项目 |
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| Insecticide Resistance to Several OPs of Cotton Bollworm in Shaanxi Province |
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Yang Chongzhen Zhang Xing Wang Xinglin
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| Abstract: |
| The resistance level of cotton bollworm (Heliothis armigera)from Shaanxi Province to several OP-insecticides was determined.The results sbowed that,to monocrotophos,strains from Yangling , Sanyuan,Dali and Weinan were lowly resistant,tolerate and susceptible, respectively.For malathion ,the LD50 of strains from Yangling,Weinan and Sanyuan were 0.2769,0. 1273 and 0.1063 ug per worm. Strains from Weinan were still susceptible to parathion-methyl with a resistance index of 2.8766 and to methamidophos with a resistance index of only 0.6488. |
| Key words: OP-insecticides,cotton bollworm（Heliothis armigera),insecticide resistance |
