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根据冬前越冬基数调查,结合气象资料及上海市的耕作制度综合分析,预计2005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、油菜菌核病中等发生;稻象甲、稻瘟病、小麦白粉病中等偏轻发生;三化螟轻发。
According to the investigation of winter wintering base, combined with the meteorological data and the comprehensive analysis of farming system in Shanghai, it is estimated that the overall occurrence trend of grain and oil crop diseases and pests in Shanghai in 2005 will be biased. 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, rape sclerotiorum occur moderately; rice mech, rice blast, wheat powdery mildew moderately light; light yellow rice borer.