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大洼县是辽宁省主要高产稻区之一。种植面积65万多亩,平均单产550多公斤,但近年来,每年都受到了不同程度的病虫危害,产量受损失,品质下降。九○年是大洼县病虫危害较严重的一年。一、病虫害发生的基本情况 (一)病虫害的种类多、发生面积大、危害加重。据县植保站调查,近年来给水稻生产造成危害的病虫害主要有穗颈
Dawa County is one of the major high-yielding rice areas in Liaoning Province. Planting an area of more than 650,000 mu, with an average yield of more than 550 kilograms, but in recent years, pests and diseases have been affected to varying degrees every year, the yield is lost and the quality declines. Ninety years is a more serious pest and disease hazard in Dawa County. First, the basic situation of pests and diseases (a) pests and diseases of many types, the occurrence of large area, increasing the risk. According to the survey conducted by the Plant Protection Station of the county, pests and diseases that cause harm to rice production in recent years are mainly panicle neck