我县优质粳稻区麦田化学防除杂草，多年来一直沿用苯氧羧酯类的２甲４氯和２·４—Ｄ丁酯，杂草群落已开始发生变化，由阔叶性杂草转变为以看麦娘、水燕麦为主的禾本科杂草群落。由于稻茬麦田中耕困难，除草费工费时，加上杂草繁殖能力强，一般每平方米２０～３０株，严重... Weeds in the high-quality japonica rice fields in our county have chemical weed control. For many years, we have been using 2-MCPD and 2,4-D butyl esters. The weed community has started to change from broad-leaved weeds to To see Ophiopogon, water oat-based grass weeds community. Due to the difficulty of cultivating rice crop in wheat field, the cost of weeding fee and the weed breeding ability are strong, generally 20 ~ 30 per square meter, serious ...