除草剂苗期茎叶喷雾对胡麻田芝麻菜的防除效果

Effect of Spraying Herbicide on Arugula in Flax Field at Seedling Stage

开展了40%二甲·辛酰溴EC等7种除草剂及40%二甲·辛酰溴EC+48%灭草松AS等7个混用组合防除胡麻田芝麻菜的田间试验,旨在筛选出安全、高效除草剂及其混用组合,为有效防除芝麻菜提供科学依据。结果表明,48%灭草松AS、40%二甲·辛酰溴EC+48%灭草松AS苗期茎叶喷雾对胡麻安全,对胡麻田芝麻菜具优良防效,药后45 d的株防效分别为93.41%、92.10%,鲜重防效分别为95.39%、95.33%。对胡麻增产效果显著,产量分别为2451.15、2373.30 kg/hm 2,较CK分别增产1717.80、1639.95 kg/hm 2,增产率分别为234.24%、223.62%。从安全性、除草效果和产量3个方面综合评价,48%灭草松AS及其混用组合48%灭草松AS+40%二甲·辛酰溴EC是苗期茎叶喷雾防除胡麻田芝麻菜的安全、高效除草剂,其大面积示范推广的适宜剂量分别为4500 mL/hm 2、2250 mL/hm 2+750 mL/hm 2。

In order to screen safe and high effective herbicides and mixtures of the herbicides and provide scientific instruction for effective controlling Eruca vesicaria subsp.sativa in flax field,application test in flax field of 7 herbicides and 7 mixtures of the herbicides on controlling E.sativ were carried out.The results showed that 48%Bentazone AS and 40%MCPA-sodium and bromoxynil octanoate EC+48%Bentazone AS were safe to flax by spraying on stems and leaves of the weed and flax seedling,and had excellent control effects on the weed in flax field,the plant control effects 45 days after spraying were 93.41%and 92.10%,the fresh weight control effects were 95.39%and 95.33%,respectively.These herbicides had significant results of increasing yield on flax,the yield were 2451.15 and 2373.30 kg/hm 2,increasing yield by 1717.80 and 1639.95 kg/hm 2 compared with CK,yield increase rates were 234.24%and 223.62%,respectively.Comprehensive evaluation on the basis of three aspects of safety,controlling effect and yield,48%Bentazone AS and 40%MCPA-sodium and bromoxynil octanoate EC+48%Bentazone AS were safe and high effective herbicides for controlling E.vesicaria subsp.sativa in flax field,the suitable dosages for large-scale demonstration and popularization were 4500 mL/hm 2 and 2250 mL/hm 2+750 mL/hm 2,respectively.