西藏青稞田阔叶杂草防治药效初步对比试验

Preliminary Comparative Experiment on Control Efficacy of Broad-leaved Weeds in Tibetan Barley Fields

为了筛选出新型、高效、低残留的青稞田阔叶杂草除草剂,本文通过西藏青稞田阔叶杂草除草剂防效对比试验,评估了75%苯磺隆水分散粒剂、千里寻(2甲·氯·双氟)、10%唑草酮可湿性粉剂和双氟磺草胺悬浮剂等不同除草剂防除效果及对青稞的安全性。结果表明,10%唑草酮可湿性粉剂22 g/667m2,施药后15 d平均防效达到95.24%,除草效果较好、持效期较长;75%苯磺隆水分散粒剂1.2 g/667m^2和千里寻(2甲·氯·双氟),50 mm/667m^2,施药后15 d平均防效分别达到70.86%和82.48%,除草效一般;双氟磺草胺悬浮剂5 mm/667m^2,施药后15 d平均防效达到61.39%,除草效果较差。

In order to screen out new,high-efficiency and low-residue broad-leaved weed herbicides in highland barley fields,the present article evaluated 75%tribenuron-methyl water-dispersible granules,the control effect of different herbicides such as Qianlixun(2M·Chlorine·Difluoro),10%carfentrazone WP and diflufenazone suspension agent and their safety to highland barley.The results showed that 10%carfentrazone WP 22 g/667m^2,15 days after application,the average control effect reached 95.24%,the weeding effect was better,and the lasting effect was longer;75%tribenuron-methyl water dispersible granules 1.2 g/667m^2 He Qianlixun(2M·Chlor·Difluoro),50mL/667m^2,the average control effect reached 70.86%and 82.48%after 15 days of application,respectively,and the herbicidal effect was average;the sulfentrazone suspension was 5 mL/667m2,applied.The average control effect reached 61.39%15 days after the medicine and the herbicidal effect was poor.