一、免耕麦田杂草发生和危害情况三麦免耕栽培技术,是江苏省三麦生产上的一项重大改革,近几年来发展较快。1984年全省200多万亩,1985年950多万亩,1986年发展到1618万亩(包括免、少耕)。但免耕麦田的草害发生普遍,特别是连续免耕麦田危害严重。据调查,危害麦田的杂草有72科390多种,其中 First, the tillage and tillage in tillage wheat weeds Tammy Tillage cultivation techniques, is the production of three wheat in Jiangsu Province, a major reform, rapid development in recent years. In 1984 more than 200 million mu of the province, more than 9.5 million mu in 1985, developed to 16.18 million mu in 1986 (including free, less tillage). However, the incidence of grass-roots damage in tillage wheat fields is widespread, especially in continuous tillage wheat fields. According to the survey, there are 72 families and 390 species of weeds harming wheat fields