4种除草剂与助剂安融乐协同防除紫花苜蓿田马唐的研究

为探究高效氟吡甲禾灵?精吡氟禾草灵?烯草酮?精喹禾灵对紫花苜蓿田老根马唐的防除效果及助剂安融乐对上述4种药剂的增效作用, 在室内测定马唐幼苗和成株对4种除草剂及添加助剂的敏感性, 并在田间验证上述4种除草剂与助剂混用对老根马唐的防效?室内结果表明, 成株马唐对高效氟吡甲禾灵?精吡氟禾草灵?烯草酮?精喹禾灵的耐药性增加明显, 其中精喹禾灵的耐药性增加最大; 高效氟吡甲禾灵?精吡氟禾草灵?烯草酮?精喹禾灵与安融乐混配后, 成株马唐的鲜重GR50(有效成分)较单用上述除草剂分别减少16.6%?31.0%?31.5%?6.2%, 其中烯草酮与安融乐混配增效作用最为明显?田间结果表明, 安融乐的加入能提高上述4种除草剂对老根马唐的防效, 其中烯草酮和安融乐混配对老根马唐的增效最优, 株防效和鲜重防效较单用分别增加10.39和8.58百分点, 并显著提高紫花苜蓿产量?

Synergistic control of crabgrass with four herbicides and adjuvant anrongle in alfalfa field

In order to explore the efficacy of haloxyfop-P-methyl, fluazifop-P-butyl, clethodim and quizalofop-P-ethyl on old root crabgrass in alfalfa field and the synergistic effect of the additive anrongle on the above four herbicides, we measured indoor the susceptibility of crabgrass seedlings and adult plants to the four kinds of herbicides and adjuvant. Besides, the control effect of the four tested herbicides mixed with adjuvant on old root crabgrass was verified in the field. Indoor test showed that the resistance of adult crabgrass to haloxyfop-P-methyl, fluazifop-P-butyl, clethodim and quizalofop-P-ethyl increased significantly, with the greatest increase in quizalofop-P-ethyl. When the four herbicides mixing with anrongle individually, the fresh weight GR50 value (active ingredient) of adult crabgrass decreased by 16.6%, 31.0%, 31.5% and 6.2%, respectively, compared with single use. Among them, clethodim and anrongle showed the most obvious synergistic effect. Field test exhibited that the addition of anrongle improved the control effect of the four tested herbicides against old root crabgrass. Combination of clethodim and anrongle had the best synergistic effect against old root crabgrass, with the plant and fresh weight control efficacy increased by 10.39 and 8.58 percentage, respectively, compared with single use. In addition, the addition of anrongle significantly increased the yield of alfalfa.