兴安盟为北方大豆产区。近年来随着大豆播种面积扩大，大豆重迎茬面积及年限也随之增加，导致大豆孢囊线虫病、根腐病和根潜蝇（下称“两病一虫”）逐年加重发生。１９９６～１９９８年发生面积达８．７８万ｈｍ２，损失大豆３２９０．１万ｋｇ。已上升为该盟大豆主要病虫... Xing’an League for the northern soybean producing areas. In recent years, with the sown area of ​​soybean expanded, the area and years of soybean stubble continued to increase, leading to the year-by-year aggravation of soybean cyst nematode disease, root rot disease and root snail flies (hereinafter referred to as “two diseases and one worm”). From 1996 to 1998, an area of ​​87,800 hm2 occurred, with a loss of 32,901,000 kg of soybean. Has risen to the League soybean major pests ...