【摘要】 为筛选韭菜苗期化学除草剂,选用33%二甲戊灵乳油、96%精异丙甲草胺乳油、80%唑嘧磺草胺水分散粒剂和90%乙草胺乳油4种药剂,共设置了6种药剂组合,分别在不覆膜和覆膜2种情况下,且在韭菜播种后地面封闭施药。结果表明:药后第30天,覆膜组株密度防效维持在89.07%～99.89%,不覆膜组株密度防效维持在95.26%～99.14%;药后第45天,覆膜组株密度防效维持在88.90%～97.81%,不覆膜组株密度防效维持在94.53%～97.35%,所有供试药剂的鲜质量防效均在98%以上。各供试药剂组合的株密度防效和鲜质量防效均比较理想,持效期较长,且对后茬作物安全。综合以上来看,防效较佳的组合为:覆膜组的96%精异丙甲草胺乳油+80%唑嘧磺草胺水分散粒剂,株密度防效与鲜质量防效分别为97.81%和99.92%,且单位面积韭菜株数最高;不覆膜组的33%二甲戊灵乳油+80%唑嘧磺草胺水分散粒剂,株密度防效与鲜质量防效分别为97.35%和99.94%。更多还原

【Abstract】 In order to screen chemical herbicides for leek seedling weeding, 33% pendimethalin EC(Emulsifiable Concentrates), 96% s-metolachlor EC 80% flumetsulam water dispersible granules and 90% acetochlor EC were sprayed and six combinations of herbicides were set up. Under the conditions of no film mulching and film mulching, the herbicides were sprayed on the ground after leek sowed. The results showed that on the 30 th day after treatment, the control effect of plant density was 89.07%～99.89% in film mulching group, and that was 95.26%～99.14% in no film mulching group. On the 45 th day after treatment, the control effect of plant density was 88.90%～97.81% in film mulching group, that was 94.53%～97.35% in no film mulching group. The plant density control effect and fresh weight control effect of the tested combinations were ideal with a long duration, which was safe for subsequent crops. In conclusion, 96% s-metolachlor EC blended by 80% flumetsulam water dispersible granules in film mulching group had better control effect. The plant density control effect and fresh weight control effect were 97.81% and 99.92% respectively, and the number of leek plants per unit area was the highest. The plant density control effect and fresh weight control effect of 33% pendimethalin EC blended by 80% flumetsulam water dispersible in no film mulching group were 97.35% and 99.94%, respectively.更多还原