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为了探讨上海市郊区农田杂草防除策略,1980～1983年制订了草害程度分级和分级标准,并开展了大面积草害调查,基本摸清了上海郊区农作物草害的面积、损失和主要种类。并根据资料分析,提出几点有关防除策略的意见,供有关部门参考。从4000多块田的调查结果,上海郊区早稻田内草害面积占78.8％,其中中度以上草害面积占42.4％,麦田草害面积达68.33％,中度以上草害面积占34.03％,棉田在吐絮期草害面积达72.0％,中度以上草害面积达
In order to explore the control strategy of farmland weeds in suburban area of Shanghai, 1980-2003, we formulated the grading and grading standards of grassland damage degree and carried out a large area grassland survey to basically ascertain the area, loss and main types of crop damage in the suburbs of Shanghai. . And according to the data analysis, put forward some opinions on the strategy of prevention and control for the reference of relevant departments. According to the survey of more than 4,000 plots, the area of grassland damage in early paddy fields in Shanghai suburbs accounted for 78.8% of the total area, of which, 42.4% of grassland was moderately affected, 68.33% of grassland was affected by wheat fields, 34.03% of grassland was moderately affected, Grass boll weeping area reached 72.0%, medium and above grass damage area of up to