纳米18%阿维·烟碱AS对菜粉蝶效力测定的研究

Control effect determination research of nanometer 18% avermectin·H_2SO_4-nicotine AS to Pieris rapae Linnaeus

纳米18％阿维·烟碱AS对菜粉蝶幼虫毒力测定结果：比单剂1．8％阿维菌素EC和40％硫酸烟碱EC的毒力都高，得出了毒力回归方程式，共毒系数值大干常数值100，表明纳米18％阿维·烟碱AS具有较强的增效作用；配伍纳米18％阿维．烟碱AS在室内测出了对菜粉蝶效力最强的最佳使用剂量梯度（每公顷用药量），研究表明：用375～750mL／hm^2，有效成份a．i．g／hm^2（67.5～135g）对水750L，对菜粉蝶的防效高、速效性和持效性强。

The results of Pieris rapae L. toxicity determination showed：Nano-18 % Avermectin ·H2SO4 -nicotine AS is higher than both 1.8 % Avermectin EC and 40 % H2SO4 -nicotine EC. The syntoxicity coefficient of nano-18% Avermectin·H2SO4 -nicotine AS in higher than 100 ,which indicated high joint action. By toxicity determination in room,we know that nano-18 % Avermectin · H2SO4-nicotine AS has excellent and quick control effect,long persevered duration on preventing Pieris rapae L. , the best use dose is （doses of hectare） ：375 -750 mL/ hm^2 ,a. i. g/hm^2 is 67.5 - 135 g and 750 L water.