【摘要】 在盆栽试验条件下 ,初步研究了 2 ,4 D丁酯对大豆的安全剂量以及对氟磺胺草醚除草效果的影响。结果表明 ,在大豆 2片复叶期施用 2 ,4 D丁酯应在 1 0 5 ga i /hm2 以下 ;2 ,4 D丁酯与氟磺胺草醚混用能显著提高对苍耳的防效 ,2 ,4 D丁酯 1 0 5 ga i /hm2 与氟磺胺草醚 31 2 5、 375 5 ga i /hm2 混用对苍耳的鲜重防效分别达到 85 1 %、 92 7% ;2 ,4 D丁酯 1 0 5ga i /hm2 以下与氟磺胺草醚混用对大豆安全更多还原

【Abstract】 The initial potted experiment was conducted to study the safe applying dosage of 2,4 D butyl in Soybean field,the influence of 2,4 D butyl on control efficacy and sensitivity to soybean of fomesafen The result shown that:2,4 D butyl dosage under 10 5 g a i /ha did not affect the safe of soybean in 2 leaf stage,2,4 D butyl can improve the control efficiency of fomesafen for Xanthium strumarium,the effect of mixed application of 2,4 D butyl 10 5 g a i /ha , fomesafen 312 5 and 375 5 g a i /ha against Xanthium strumarium were fresh weight reduction of 85 1% and 92 7% respectively,the safe applying concentration of 2,4 Dbutyl mixed with fomesafen is under 10 5 g a i /ha更多还原