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大豆根绒粉蚧(Eriococcus sp.)属同翅目,蚧总科,绒粉蚧属,是近年来发现危害大豆的一种新的根部害虫。此虫在我县危害日趋严重,轻者减产30%,重则减产70%以上。1986年全县受害面积约2400亩,李楼乡徐寨行政村有170余亩基本绝收,对大豆产量造成严重影响。作者于1985～1987年对此虫进行了调查研究。一、危害与寄主大豆根绒粉蚧寄生大豆根部,刺吸根部营养,使侧根减少,植株瘦弱,叶片自下而上变黄,以后叶片逐渐失水干枯,荚果卷曲
Eriococcus sp. Is a new root pest that has been found to be harmful to soybean in recent years. This insect is more and more harmful in our county, with the light output reduced by 30% and the output reduced by more than 70%. In 1986, the affected area of the whole county was about 2,400 mu, and the Xuzhai Administrative Village of Li Louxiang basically took in more than 170 mu, which seriously affected the output of soybean. The author conducted a survey of this worm from 1985 to 1987. First, the hazards and host Soybean root velvet mealybugs parasitic Soybean root, thorn sucking root nutrition, so that lateral roots reduce plant thin, yellow leaves from bottom to top, after the leaves gradually dehydration, pod curl