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70年代以来,苏南稻麦连作地区麦田看麦娘已成为夏熟作物增产的主要障碍。据句容县调查,一般看麦娘数量每平方米达1.5—2千株,多的田块达4—5千株,个别田块高达1—2万株。由于该地区稻、麦、稻、油菜轮作,油菜田看麦娘发生也很严重。 1985、1986年作者在江宁县其林乡进行夏熟作物田防除看麦娘的研究过程中,发现
Since the 1970s, looking at Aman in the wheat field in the area where wheat and wheat are continuous in southern Jiangsu has become a major obstacle to the increase of summer crops. According to the survey conducted by Jurong County, the average number of Anemarrhena asphodelus reaches 1.5-2 thousand plants per square meter, more than 4-5 thousand plots and up to 1-2 thousand individual plots. Due to the region of rice, wheat, rice, rapeseed rotation, rape fields look Aman is also very serious. In 1985, 1986, the author found that in summer, when he studied summer wheat field in its forest township, Jiangning County, he found that