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期 刊 ：植物保护学报 2011年

关键词：高效氯氟氰菊酯；油酸甲酯；物理性状；药效；

Keywords:lambda-cyhalothrin, methyl oleate, physical characteristics, bioactivity,

摘 要 ：采用浸渍法、表面张力仪测定法和液滴干燥法分别测定了不同油酸甲酯含量的药液在3种作物叶片上的最大稳定持留量、表面张力及干燥时间,以浸叶法与浸虫法测定了不同油酸甲酯用量下高效氯氟氰菊酯对菜青虫及小地老虎的室内毒力,并进行了田间药效试验。结果表明,在2.5%高效氯氟氰菊酯水乳剂中油酸甲酯用量从5%提高至35%,稀释药液最大稳定持留量提高21.08%~125.14%,表面张力降低6~12 mN/m,干燥时间延长6~20 min,且高效氯氟氰菊酯对菜青虫和小地老虎的毒力明显增强;田间增加油酸甲酯用量可明显提高高效氯氟氰菊酯对菜青虫的防治效果,3 000倍液药后7天防效从79.22%增至96.54%。

Abstract:In this study, the maximum retention ability (R_m) on three crop leaves, surface tensions and dry durations of spray liquid of methyl oleate were tested using immersion method, surface tension instrument mensuration and drying drop method. The toxicity of lambda-cyhalothrin against Pieris rapae and Agrotis ypsilon were measured using larvae dipping method and leaf dipping method. The control efficacy of lambda-cyhalothrin was also tested in the field. Results demonstrated that with the methyl oleate content in the lambda-cyhalothrin emulsion in water increased from 5% to 35%, the maximum retention ability increased by 21.08%-125.14%, surface tensions decreased by 6-12 mN/m, dry duration increased by 6-20 min, the toxicity of lambda-cyhalothrin to P.rapae and A.ypsilon enhanced significantly, meanwhile, the control efficacy of 7days increased from 79.22% to 96.54% when applied with 3 000 times diluents.

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