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中文摘要：
为探索小菜蛾的药剂减量化防治技术，采用田间试验研究了 Silwet 408有机硅助剂与阿维菌素和氯虫苯甲酰胺桶混施用的防治效果。结果表明，在1．8％阿维菌素乳油2000倍液和20％氯虫苯甲酰胺悬浮剂5000倍液中桶混添加Silwet 408有机硅助剂3000～5000倍液均可显著提高药剂对小菜蛾的防治效果；而2种药剂中桶混Silwet 408有机硅助剂5000倍液，在喷液量减少10％～20％的情况下，仍可取得与相应药剂正常使用量相当的防治效果。综合分析，在采用阿维菌素和氯虫苯甲酰胺防治小菜蛾时，Silwet 408有机硅助剂的添加量以稀释5000倍为宜，可减少农药喷液量20％。
英文摘要：
In order to explore the pesticide dose-reduced control technique of diamondback moth, Plutella xylostella （L.）,experiments were conducted to examine the tank-mixing effects of insecticides,such as 1.8% abamectin EC and 20% chloantraniliprole SC,with organic silicon surfactants Silwet 408 under field conditions.The results indicated that the controlling efficacy of abamectin and chloantraniliprole against P.xylostella significantly increased when Silwet 408 was added with 3 000-5 000 fold dilution into 1.8% abamectin EC diluted to 2 000 times with water and 20% chloantraniliprole SC diluted to 5 000 times with water,compared to that with the insecticides applied alone.Adding of Silwet 408 with 5 000 fold dilution could reduce application of 10%-20% insecticides,which resulted in similar control effects to their general dose.Therefore, the suitable dose of Silwet 408 added into insecticide solution by tank-mixing was 0.02% and the dose of insecticides sprayed for controlling the pest can be reduced by 20%.
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