【摘要】 比较了氟乐灵、精异丙甲草胺、甲草胺和乙草胺4种芽前除草剂在不同施用时间、不同施用浓度对堤防草坪冬春性杂草株防效的影响。结果表明,精异丙甲草胺株防效最好,氟乐灵和乙草胺次之,甲草胺最差;施药浓度越大株防效越好;施药时期以9月20日株防效最好,9月10日次之,9月30日最差;最佳方案为选择0.25 mL/m2的精异丙甲草胺于9月10~20日或0.42 mL/m2的氟乐灵于9月20日施药。更多还原

【Abstract】 Effects of four kinds of preemergence herbicides including trifluralin, dual gold, alachlor and acetochlor on controlling winter-spring herbs when applied in various concentration and timing were studied. The results showed that the control effectiveness of dual gold was the best, trifluralin and acetochlor were the second, and alachlor was the worst. The greater the concentration of herbicide was, the better the results were. The best timing of an application was on 20th Sept., with the next on 10th Sept., and the worst on 30th Sept.. The optimal scheme was high concentration of dual gold applied on 10th to 20th Sept., or high concentration of trifluralin on 20th Sept..更多还原