我县推广化除始于1982年，引进推广二甲四氯。由于工作刚刚起步，农民的观念没有改变，农村剩余劳力多以及技术、防效等许多因素的制约，进展缓慢。1985年大量引进推广使用丁草胺，由于在水稻田使用防效差，特别对阔叶类杂草防效差，也难以被农户接受。1989年引进了西颗粒刘进? My county to promote the addition except since 1982, the introduction of promotion of dimethyl tetrachloro. Due to the fact that the work has just started, the concept of the peasants has not changed, the surplus rural labors and many other factors such as technology and prevention and control have been slow to progress. The introduction of a large number of popularization and use of butachlor in 1985, due to the poor control effect in the paddy fields, especially the broad-leaved weeds poor control, it is difficult to be accepted by farmers. In 1989 the introduction of the West particles Liu Jin?