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自七十年代中期以来,太湖地区麦田草害逐年严重.据郑晓明等调查,本区麦田杂草有21科53种.其发生量以看麦娘和日本看麦娘最多,占70%,其次是繁缕,占15%,蓼草占5%,其他杂草占10%.据三麦苗期调查,一些高产社队麦田,每平方公尺有看麦娘100株左右,折合每亩60万株.杂草严重麦田每平方尺高达300株以上,折合每亩180万株,相当于三麦基本苗的3～6倍.抽穗期调查,一般麦田每亩杂草鲜重850～1100斤,严重田块高达2000斤以上,相当于一季生长较差的绿肥鲜草量.杂草与三麦争水、争肥、争光,助长病虫为害,致使一般草害田麦子每亩减产40～50斤,严重田每亩少收80～200斤.全区近650万亩三麦,发生草害麦田约100万亩,估计由于杂草为害,每年减收三麦达3亿斤左右.麦田草害已成为影响本区三麦生产的严重问题.
Since the mid-1970s, the crop of wheat in the Taihu Lake area has been gravely deteriorated year by year. According to surveys by Zheng Xiaoming, there are 53 families of 21 families of weeds in the field, accounting for 70% of the total. Is the prevalence of 15%, 5% of the grass, 5% of other weeds, 10% of other weeds.According to the three wheat seedling survey, some high-yielding commune wheat fields, there are about 100 plants per square meter Aman, equivalent to 600,000 per mu Strains of weeds seriously per square foot of wheat fields up to 300 or more, equivalent to 1.8 million per acre, equivalent to three wheat seedlings 3 to 6 times.Heading period survey, the general wheat per mu fresh weight 850 ~ 1100 pounds, Serious plots of up to 2,000 pounds, equivalent to a quarter of poor growth of fresh green manure. Weeds and three wheat water, fight fat, win glory, contributing to pests and diseases, resulting in the general grassland wheat yield per acre 40 to 50 Kg, serious field per acre less 80 ~ 200 catties.Area of nearly 6500000 acres of wheat, grassland occurred about 1000000 acres of wheat, it is estimated that due to the weeds damage, an annual reduction of about 300000000 kilograms of wheat field Harm has become a serious problem that affects the production of Sanmai in this area.