通过5次田间试验和大面积示范,测定了速灭杀丁等6种药剂不同用量、剂型对豆田主要害虫及天敌种群数量的影响作用。经新复极差测验等分析结果表明:苗期应用氧化乐果(微粒剂,有效成份)20g/亩、速灭杀丁3g/亩;花荚期应用灭幼脲三号胶悬剂20g/亩,可基本控制豆田主要害虫并保护主要天敌,是当前协调豆田化防与生防矛盾的一条有效措施。 Five field trials and a large area demonstration were carried out to determine the effects of different dosages and formulations of six kinds of pesticides such as trimethoprim on the population of major pests and natural enemies in soybean fields. The results of the new complex test showed that: the application of omethoate (granules, active ingredients) 20g / acre, the speed of killing Ding 3g / acre; flower pod stage application of diflubenzuron three suspension 20g / Mu, can basically control the main pests in soybean fields and protect the main natural enemies, is an effective measure to co-ordinate the conflicts between the prevention and the biological control of soybean.