增效乐果药效试验研究

1987—1989年应用10％、25％增效乐果乳油防治大豆蚜虫。结果表明,增效乐果有效成分用量(以下同)75—180g/ha,施药后24小时对大豆蚜的效果在90％以上,与常用防蚜虫药剂乐果400—600g/ha药效相同,略高于杀灭菊酯60g/ha的效果。增效乐果对桃蚜、大豆红蜘蛛,小麦粘虫均有很好的防效。

STUDIES ON EFFECTS OF SYNERGETIC ROGOR AGAINST INSECT PESTS

Soybean aphid (Aphis glycines Matsumura), a main insect pest, occured widespreadly in soybean in Jilin province, China. From 1987 to 1989 the synergetic Rogor was tested against soybean aphid. The results indicated that the mortality was above 95％ using synergetic Rogor at 75-180g (ai)/ha.on soybean aphid 2 days after the application. The effects were equal to Rogor applied at 400-600g(ai )/ha. and better than Sumicidin(fenwalerate) treated with 60g(ai)/ha. The synergetic Rogor also had high biological effects on green peach aphid(Myzus persicae Sulzer), armyworm (Mythimna separata Walker) and twospotted spide mite (Tetranychus urticae Koch).