自70年代后期以来,稻田化学除草使用的除草剂主要是除草醚,除草醚虽有较好的除草效果,但对水稻上层杂草的控制作用较差。随着除草醚的长期单一使用,我县稻田草相发生了变化,水稻中后期草害明显加重。1984～1986年,我们研究了稻田杂草的发生规律,在此基础上,进行了不同除草剂除草效果对比试验,筛选出了替代除草醚的药种。 Since the late 1970s, herbicides used in chemical weed control in paddy fields have been mainly used as weed herbicides. Although herbicides have a good herbicidal effect, their weeding control effect on the upper weeds in rice is poor. With the long-term single use of weeding ether, rice grassland facies in our county has changed, and the late-stage rice aggravate obviously. From 1984 to 1986, we studied the law of the occurrence of weeds in paddy fields. On this basis, we conducted comparative experiments on weeding effects of different herbicides and screened out alternatives to weed herb.