【摘要】 为了筛选对恶性杂草苣荬菜防除效果好的除草剂,采用田间小区试验的方法对14种茎叶处理除草剂对苣荬菜的防效进行了比较。结果表明,施药后30d,辛酰溴苯腈25%乳油株数防效最高为90.0%;其次为2,4-滴丁酯72%乳油和二氯吡啶酸30%水剂,株数防效分别为86.7%和84.4%,鲜重防效分别为94.1%的93.4%;氯酯磺草胺84%水分散粒剂和苯唑草酮30%悬浮剂的鲜重防效也良好,分别为92.4%和91.7%。结论显示,辛酰溴苯腈25%乳油、二氯吡啶酸30%水剂、2,4-滴丁酯72%乳油、氯酯磺草胺84%水分散粒剂、苯唑草酮30%悬浮剂对苣荬菜有良好的防控效果。更多还原

【Abstract】 In order to screen the suitable herbicides for the control of Sonchus brachyotus, field efficacy trials were conducted to deter mine the control effects of 14 post-emergence herbicides against Sonchus brachyotus. The results showed that bromoxynil octanoate 25% EC provided the highest weed plantcontrol effect 90.0% 30 days after treatment, followedby 2,4-D butylate 72%EC 86.7% and clopyralid 30% AS 84.4%, and the control effects of fresh weight were 94.1%and 93.4%, respectively, followed by cloransulam-methyl 84% WG 92.4% and topramezone30% SC 91.7%. In conclusion, bromoxynil octanoate 25% EC, 2,4-D butylate 72% EC,clopyralid 30% AS, cloransulam-methyl 84% WG and topramezone 30% SC showed good control effects on Sonchus brachyotus.更多还原