近几年，黑龙江省大部分县市南瓜种植田从每年的７月份开始出现大面积烂秧烂瓜，仅桦南一个县每年就有大约５０％的面积因该病而毫无收成，经济损失达２０００万元，严重威胁南瓜生产，影响白瓜籽公司的效益。经调查研究，南瓜的死秧烂瓜是由疫霉菌侵染引起的，而且该菌还... In recent years, most counties and cities in Heilongjiang Province, pumpkin fields began from July each year, large areas of rotten seedlings rotten, only a single county in Huanan each year about 50% of the area because of the disease and no harvest, economic losses Reaching 20 million yuan, a serious threat to pumpkin production, affecting the benefits of white melon seed companies. After investigation, the dead pumpkin seedlings are caused by Phytophthora infantile infection, but the bacteria also ...