根据有关部门对冬前越冬基数调查,结合气象资料及上海市的耕作制度综合分析,预计今年上海市粮油作物病虫害总体发生趋势为偏重程度。其中水稻纵卷叶螟大发生;白背飞虱、纹枯病中等偏重发生;二化螟、大螟、恶苗病、麦类赤霉病中等发生,局部偏重;褐飞虱、稻曲病、条纹叶枯病、油 According to the relevant departments on winter overwintering base survey, combined with meteorological data and comprehensive analysis of the farming system in Shanghai, it is estimated that the overall occurrence of pests and diseases in grain and oil crops in Shanghai this year will tend to be heavier. Among them, the rice leafroller occurred in large scale; the whitebacked planthopper and the sheath blight occurred moderately; the Stem Borer, Sesamia inferens, the Fusarium venenatum and Fusarium graminearum occurred moderately and locally; the brown planthopper, Leaf blight, oil