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明确6种大豆田除草剂对反枝苋的防除效果。选用6种大豆田茎叶除草剂,灭草松、乙氧氟草醚、氟磺胺草醚、氯酯磺草胺、异噁草松、三氟羧草醚在反枝苋真叶期-1片互生叶期时进行茎叶喷雾处理,施药后30 d,调查反枝苋的株高抑制率、株防效、鲜重防效。结果表明,21.4%三氟羧草醚水剂对反枝苋的防效最好,基本达到100%;48%灭草松水剂和24%乙氧氟草醚乳油对反枝苋的防效较好,鲜重防效达到82.13%和72.43%;25%氟磺胺草醚水剂和48%异噁草松乳油对反枝苋的防效一般,鲜重防效达到55.27%和47.34%;84%氯酯磺草胺水分散粒剂对反枝苋的防效较差,鲜重防效最高为35.50%。
The effects of six kinds of soybean field herbicides on the control of Amaranthus retroflexus were clarified. Six kinds of soybean field stem and leaf herbicides, imazapyr, oxyfluorfen, fomesafen, mesotrione, clomazone, acifluorfen were used in the true leaf stage -1 Stems and leaves were sprayed at the same leaf-growing stage. After 30 days of application, the plant height inhibition rate, plant control effect and fresh weight were tested. The results showed that 21.4% acifluorfen aqueous solution had the best control effect on Remy, basically reached 100%. The control effect of 48% Mefenonide and 24% oxyfluorfen EC on Remy The fresh weight control efficiency reached 82.13% and 72.43%, respectively. The control effect of 25% fomesafen and 48% clomazone on the population of Amaranthus retroflexus was 55.27% and 47.34%, respectively. The control effect of 84% chlorosulfonamide water dispersible granule on Amaranthus retroflexus was poor, the fresh weight control effect was up to 35.50%.