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稻飞虱是间歇性大发生的害虫,上海郊区普遍发生的飞虱以灰飞虱、白背飞虱、褐飞虱为主。稻飞虱以刺吸式口器吸食水稻汁液,使叶鞘基部出现许多长形褐色斑点,严重时可造成水稻烂秆倒伏,抽穗困难,谷粒不饱满而减产;并能引起水稻纹枯病、小球菌核病的大发生。此外,灰飞虱还能传播稻、麦、玉米黑条矮缩病和条纹叶枯病。今年是稻飞虱大发生年分。从虫源基数、
Planthopper is a pest that occurs intermittently. Common occurrences of planthoppers in Shanghai suburbs are Laodelphax striatellus, Sogatella furcifera and Nilaparvata lugens. Rice planthopper to suck suction type mouthparts rice juice, so that the base of the leaf sheath many long brown spots, can cause serious lodging of rice lodging, heading difficulties, grain yield is not full, and can cause rice sheath blight, Occurrence of small sclerotinia. In addition, SBPH can also transmit rice, wheat, corn black streaks and stripe virus. This year is the year of planthopper big year. From the insect base,