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皖东丘陵地区,位于江淮之间,常年种植小麦320万亩左右,总产8亿公斤。近年来,麦田杂草危害日趋加重。据统计,1980年麦田草害面积98万亩,1986年达到150.5万亩,草害面积增加53.6％,平均每年增加8.7％。杂草发生密度每平方尺30～200株,多的达300株以上。因草害减产,一般为10～20％,严重的达50％以上。如不进行有效防除,全区年损失小麦可达4500万公斤左右。可见,麦田草害已成为小麦生产再上新台阶的重大障碍。
Hilly areas in eastern Anhui Province, located between Jianghuai, perennial planting of about 320 acres of wheat, with a total output of 800000000 kilograms. In recent years, the harm of weeds in wheat fields is getting worse. According to statistics, in 1980, the grassland area of wheat fields was 980,000 mu, reaching 1.5,050,000 mu in 1986, and the area of grass damage increased by 53.6%, with an average annual increase of 8.7%. Weeds occurrence density of 30 to 200 lines per square foot, more than 300 or more. Due to grass cut production, generally 10 to 20%, a serious up to 50%. Without effective prevention and control, the region will lose about 45 million kilograms of wheat annually. It can be seen that wheat field has become a major obstacle to the development of wheat production to a new level.