播后芽前和苗期施用不同除草剂对花生田杂草的防效及其对花生安全性评价

Efficacy of Different Herbicides on Weeds at Pre-Emergence After Sowing Stage and Seedling Stage in the Peanut Field and Its Selectivitity Evaluation

为评价不同除草剂种类及组合在花生播后芽前、苗期以及播后芽前+苗期对田间杂草的防除效果及对花生安全性,采用不同用量的96%异丙甲草胺乳油、不同类型除草剂在花生苗期及播后芽前+苗期进行田间试验。结果表明:播后芽前施用不同用量的96%异丙甲草胺乳油对花生田杂草的防效差异显著;苗期防除花生田杂草首选双轻组合22.5组/hm^(2)、响锄组合22.5组/hm^(2),对花生田阔叶草、自生麦苗、牛筋草都有很好的防除效果,两者产量差异不显著;播后芽前+苗期中96%异丙甲草胺乳油1050 mL/hm^(2)+双轻组合15组/hm^(2)、96%异丙甲草胺乳油1500 mL/hm^(2)+双轻组合15组/hm^(2)、96%异丙甲草胺乳油1050 mL/hm^(2)+双轻组合22.5组/hm^(2)、双轻组合22.5组/hm^(2)、双轻组合30组/hm^(2)对花生田杂草均有较好的效果,施用双轻组合30组/hm^(2)、双轻组合22.5组/hm^(2)、响锄组合22.5组/hm^(2)和96%异丙甲草胺乳油1500 mL/hm^(2)+双轻组合15组/hm^(2)产量最高。综合安全性,在花生生产中可结合实际选择用药。

The aim was to evaluate the control effect of the herbicides of the different types and combinations on weeds and the selectivity of peanuts at pre-emergence after sowing stage,seedling stage and pre-emergence after sowing stage+seedling stage.The experiment was carried out with different dosage of metholachlor 96%EC and different herbicides in the peanut field.The results showed that the control effects of metholachlor 96%EC with different dosages on weeds in peanut fields were significantly different at pre-emergence after sowing stage.22.5 group/hm^(2) of double-light combination and loud hoe combination were the first choice herbicides applied in the peanut field and present good control effect on broad-leaved weed,volunteer wheat seedlings and Eleusine indica at seedling stage.And there was no significant difference in the yield of the peanut applied the two combination herbicides.At pre-emergence after sowing stage and seedling stage,metolachlor 96%EC at 1050 mL/hm^(2)+double light combination 15 group/hm^(2),metolachlor 96%at 1500 mL/hm^(2)+double-light combination 15 groups/hm^(2),metolachlor 96%at 1050 mL/hm^(2)+double-light combination 22.5 groups/hm^(2),double-light combination 22.5 groups/hm^(2),double-light combination 30 groups/hm^(2) all had good effects on weeding in the peanut field,while the yield of peanut was highest applied double light combination 30 groups/hm^(2),double light combination 22.5 groups/hm^(2),loud hoe combination 22.5 groups/hm^(2) and metolachlor 96%EC at 1500 mL/hm^(2)+double light combination 15 groups/hm^(2).Considering the selectivity,it was able to select the herbicides according to the actual situation in the peanut production.