发生为害情况大豆胞囊线虫(又称根线虫)病,近几年来在我市蔓延较快,严重地威胁着大豆的生产。据1984年调查,全市有七个县(区)发病面积188,769亩,占大豆种植面积的39.8%,病株率一般10—15%,严重的在50%以上。以昌邑、高密和安邱三县发病较重。大豆胞囊线虫病由胞囊属线虫引起,经初步观察,该线虫一年发生4代,一代出现在6月下旬至7月中旬,二代从7月中旬至下旬;三代 Soybean cyst nematode (also known as rootworm) disease occurs in recent years, the rapid spread in our city, a serious threat to the production of soybeans. According to the 1984 survey, the disease area of ​​seven counties (districts) in the city was 188,769 mu, accounting for 39.8% of the soybean acreage. The diseased plant rate was generally 10-15% and seriously above 50%. To Changyi, Gaomi and Anqiu Quxian incidence of heavier. Soybean cyst nematode caused by the cyst nematode, after preliminary observation, the nematode occurred four generations a year, a generation appeared in late June to mid July, the second generation from mid-July to late; three generations