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Evaluation of Some Adjuvants for Improving Glyphosate Efficacy

机译:评价一些辅助剂,用于改善草甘膦疗效

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Glyphosate is the most common non-selective post-emergence herbicide used under diverse conditions. The efficacy of foliar applied herbicides is greatly influenced by adjuvants, but not all adjuvants have a synergistic effect. Greenhouse experiments were conducted using weed species of Echinochola crus-galli, Panicum maximum, Bidens pilosa, and Abutilon theophrasti to evaluate glyphosate efficacy by tank mixing with 0.5 % of Blaze~®, Condition~®, Improve~®, and Induce~®. Glyphosate at 0, 0.14, 0.28, and 0.56 kg ae/ha alone and with adjuvants was sprayed at the 4 leaf stage of weeds. Surface tension and contact angle were measured under lab conditions. Adjuvants increased the activity of glyphosate by 15-29 % compared to glyphosate alone. Among the weed species, higher mortality was observed in P. maximum and B. pilosa followed by E. crus-galli and lowest in A. theophrasti. On mortality of grass and broadleaf weed species, significant differences were observed by tank mixing glyphosate with different adjuvants. Lowest Contact Angle (CA) and Surface Tension (ST) were recorded when glyphosate (Rodeo~®, with no surfactant) was mixed with Improve and Blaze surfactants, which was significantly lower than glyphosate formulation pre-mixed with surfactant (Roundup UltraMax~®). In the case of Condition, the relative decrease in CA was less than ST when added to glyphosate. compared to Improve and Blaze. Lower ST and CA of glyphosate tank mixed with Improve and Blaze correlated with improved weed mortality in the activity study.
机译:草甘膦是在不同条件下使用的最常见的非选择性出苗后除草剂。叶面应用除草剂的功效受佐剂的影响大,但并非所有佐剂都具有协同作用。使用Echinochola Crus-galli,Panicum最大,Bidens pilosa和Abutilon Theophrasti进行的温室实验,以评估罐式混合的草甘膦效果,0.5%Blaze〜®,条件〜®,改进~®,并诱导〜®。在0,0.14,0.28和0.56kg AE / ha的草甘膦喷洒杂草的4叶阶段。在实验室条件下测量表面张力和接触角。佐剂与单独的草甘膦相比,将草甘膦的活性增加15-29%。在杂草物种中,在P.最高和B. pilosa中观察到更高的死亡率,然后在A. Theophrasti中最低。关于草和阔叶杂草物种的死亡率,坦克与不同佐剂的坦克混合草甘膦观察显着差异。当草甘膦(NoRodo〜®,没有表面活性剂)与改善和Blaze表面活性剂混合时,记录最低接触角(CA)和表面张力(ST),这显着低于与表面活性剂预混合的草甘膦配方(Roundup Ultramax→® )。在条件下,加入到草甘膦时,Ca的相对减少小于ST。与改善和爆裂相比。与改善和燃烧的草甘膦坦克的降低和Ca与活性研究中改善的杂草死亡率相关。

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