随着我国社会主义建设的发展,对大力增加大豆和甜菜的生产有着迫切的需要,而近年来仅就这两种作物的苗期害虫几次大发生的材料,足够说明这些害虫的为害,已经成为一个阻碍着大豆和甜菜增产的重要原因。单从大豆蚜的为害,根据吉林省1955年的不完全统计,就有45万公顷受害,重者减产50％以上。其他如黑绒金龟子等苗期害虫,每年亦在不同地区因为 With the development of socialist construction in our country, there is an urgent need to vigorously increase the production of soybean and sugar beet. In recent years, the material that has occurred only on several occasions for seedling pests of these two crops is enough to explain the damage caused by these pests. Become a hinder the soybean and beet production increase important reason. According to the incomplete statistics of Jilin Province in 1955, 450,000 hectares were harmed by the damage from the soybean aphid alone, with the severe case being cut by more than 50%. Others such as black velvet beetles and other seedling pests, also in different regions because each year