5种常用除草剂对绿豆杂草的田间防除效果

为了筛选适宜绿豆田杂草防除的除草剂,以市场销售量大、易购买为前提,选择5种常用除草剂,采用大区对比试验设计,以人工锄草和不锄草处理为对照,设75%噻吩磺隆90 g/hm2+960 g/L精异丙甲草胺1 872 m L/hm2、乙草胺2 250 m L/hm2播后苗前土表喷施处理,15%乙羧氟草醚乳油900 m L/hm2、15%乙羧氟草醚乳油900 m L/hm2+15%精稳杀得乳油1 050 m L/hm2、15%精稳杀得乳油1 050 m L/hm2苗后茎叶喷施处理,进行了不同除草剂及配比对绿豆(冀绿10号)田杂草防除效果的研究。结果表明:参试除草剂均对绿豆安全,其中,75%噻吩磺隆90 g/hm2与960 g/L精异丙甲草胺1 872 m L/hm2复配在绿豆播后苗前进行土表喷施对杂草防效显著;15%乙羧氟草醚乳油与15%精稳杀得乳油复配在绿豆出苗后定向喷施对绿豆田杂草防除效果最好,施药后30 d对绿豆田主要阔叶草杂草马齿苋、反枝苋及禾本科杂草牛筋草的鲜重防效分别为100%、100%和95.62%,绿豆产量为2 799.14 kg/hm2,较人工锄草处理增产2.57%。在绿豆播后苗前用75%噻吩磺隆90 g/hm2与960 g/L精异丙甲草胺1 872 m L/hm2复配剂进行土表喷施、绿豆出苗后用15%乙羧氟草醚乳油与15%精稳杀得乳油复配剂进行茎叶喷施对绿豆田杂草防除效果较好,可以用于绿豆田间杂草防除。

Effect of Weeds Control of Five Kinds of Herbicides in Mungbean Field

In order to select the suitable herbicides for weeds control in mungbean field. The effects of her-bicides on weeds control in mungbean field were studied by choosing five kinds of herbicides with a large area contrast design. Two kinds of soil treatments before mungbean emergance were 75% thifensulfuron methyl 90 g/hm2+960 g/L s-metolachlor 1 872 mL/hm2 and acetochlor 2 250 mL/hm2. Three kinds of directional spraying treatments after mungbean seedling were 15% fluoroglycofen EC 900 mL/hm2,15% fluoroglycofen EC 900 mL/hm2 + 15% fluazifop-p-butyl EC 1 050 mL/hm2,15% fluazifop-p-butyl EC 1 050 mL/hm2. The results showed that all treatments were safe to the mungbean. The effect of 75% thifensulfuron methyl 90 g/hm2 plus 960 g/L s-metolachlor 1 872 mL/hm2 before seedling for weeds control was significant. The best treatment for weeds control after seedling was 15% fluoroglycofen EC+15% fluazifop-p-butyl EC. Its control effects of fresh weight to purslane,amaranthus retroflexus and goosegrass were 100%,100% and 95.62%,respectively,after 30 d of treatment. The mungbean yield of this treatment was 2 799.14 kg/hm2 with increase by 2.57% than the control. The treatments of 75% thifensulfuron methyl 90 g/hm2 plus 960 g/L s-metolachlor 1 872 mL/hm2 before seedling and 15% fluoroglycofen EC 900 mL/hm2 plus 15% fluazifop-p-butyl EC 1 050 mL/hm2 after seedling were the best for weeds control.