牛蒡长管蚜防治药剂筛选试验

[目的]筛选防治牛蒡长管蚜的适用药剂。[方法]通过田间试验，调查施药前后牛蒡叶片上存活的牛蒡长管蚜虫，计算不同药剂处理在施药后1d,2d,7d对牛蒡长管蚜的减退率及校正防效，比较各药剂间差异。[结果]结果表明，在供试药剂中，1．8％阿维菌素EC在施药后1d、2d、7d防效分别为97．0％、99．4％、96．8％，对牛蒡长管蚜的防效最高，且持效性最好，对牛蒡生长无不良影响和药害；其次为10％吡虫啉WP，可与1．8％阿维菌素EC轮换使用。[结论]1．8％阿维菌素EC是防治牛蒡长管蚜的首选药剂，可在牛蒡种植上大面积推广使用。

Screening Experiment on Pesticides Controlling of Uroleucon gobonis

[Objective] The aim was to screen applicable pesticides controlling of Uroleucon gobonis.[Method] The number of survived Uroleucon gobonis on burdock leaves before and after spraying was investigated by field experiments,Uroleucon gobonis decrease rate and correction control effect after 1 d,2 d and 7 d by different pesticides treatments were calculated and disparities in different pesticides were compared.[Result] The results indicated that among tested pesticides,control effect of 1.8% Avermectin EC were ...