不同防治方式下靶标农药沉积量比较

[目的]明确热雾机热雾滴的有效沉积量,分析热雾滴在作物上的有效附着量。[方法]研究了3种施药机具(喷雾器、热雾机和弥雾机)的雾滴田间分布效果,并测定了3种施药方式下油菜叶片上的多菌灵含量。[结果]热雾机的雾滴在载玻片上分布比喷雾器和弥雾机均匀,热雾机防治有效距离为25 m以上,正、背面热雾粒数量分别在204～263和83～93滴/cm2。热雾机施药叶片上多菌灵含量介于喷雾器和弥雾机,下部叶片多菌灵含量达28.569 6 mg/L,高于喷雾器和弥雾机;热雾机施药土壤中多菌灵沉积量为39 176.36mg/hm2,低于喷雾器和弥雾机。[结论]热雾机作为高效、清洁的植保施药器械有广阔的利用前景。

Comparative Study on Deposition Amount of Target Pesticide under Different Control Methods

[Objective] The aim was to understand the effective deposition amount of thermal droplet of thermal-droplet machine and analyze the effective attachment amount of thermal droplet in crops.[Method] The field-distribution effects of droplet of sprayer,thermal-droplet machine and mist sprayer were studied,furthermore the content of carbendazim in rape leaves under the three control methods were determined.[Result] The distribution of droplet of thermal-droplet machine in glass slide was more uniform than that of sprayer and mist sprayer.The effective distance of thermal-droplet machine was more than 25 m,and the amounts of thermal droplet in?the front and back of glass slide were 204-263 and 83-93 per cm2,respectively.The content of carbendazim applying by thermal-droplet machine in rape leaves was between sprayer and mist sprayer.The content of carbendazim applying by thermal-droplet machine in lower rape leaves was 28.569 6 mg/L,which was higher than that of sprayer and mist sprayer.The deposition amount of carbendazim applying by thermal-droplet machine in soil was 39 176.36 mg/hm2,which was lower than that of sprayer and mist sprayer.[Conclusion] Thermal-droplet machine could be used widely as an effective and clean plant-protection pesticide-application instrument.