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Surfactant Effects on Glyphosate Efficacy

机译：表面活性剂对草甘膦功效的影响

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摘要

Field and greenhouse studies were performed to examine the influence of various surfactants with glyphosate on whole plant efficacy. Relationships were examined between glyphosate phytotoxicity and surfactant properties, including ionic form, degree of ethoxylation, and hydrophobe composition. Cationic tertiary amine surfactants enhanced glyphosate performance in both field and greenhouse studies. Nonionic allinol and octoxynol surfactants were not effective in combination with glyphosate. In field studies, glyphosate efficacy increased with increasing surfactant ethylene oxide (EO) content. Soybean and velvetleaf responded similarly to glyphosate-surfactant spray applications, as both demonstrated significant linear and quadratic relationships between increasing surfactant ethoxylation and phytotoxicity, while common lambsquarters showed a significant linear relationship only. Cationic surfactants were evaluated in the greenhouse and a significant quadratic regression of glyphosate phytotoxicity to common lambsquarters on increasing surfactant ethoxylation indicated an optimum surfactant EO content of about 10 moles. Both tertiary and quaternary ethoxylated fatty amines were effective with glyphosate in decreasing common lambsquarters' fresh weight. Fatty amine hydrophobe composition did not correlate with glyphosate phytotoxicity to common lambsquarters.
机译：进行了田间和温室研究，以检验各种表面活性剂与草甘膦对整株植物功效的影响。检查了草甘膦的植物毒性与表面活性剂性质之间的关系，包括离子形式，乙氧基化程度和疏水物组成。阳离子叔胺表面活性剂在野外和温室研究中均提高了草甘膦的性能。非离子烯丙醇和辛氧基表面活性剂与草甘膦联用无效。在田间研究中，草甘膦功效随表面活性剂环氧乙烷（EO）含量的增加而增加。大豆和草皮对草甘膦表面活性剂喷雾的反应相似，因为二者均显示出增加的表面活性剂乙氧基化与植物毒性之间存在显着的线性和二次关系，而普通羊腿仅表现出显着的线性关系。在温室中评估了阳离子表面活性剂，并且随着表面活性剂乙氧基化的增加，草甘膦对普通羊腿的植物毒性显着二次回归，表明最佳表面活性剂EO含量约为10摩尔。乙氧基化的叔胺和季脂肪胺对草甘膦都能有效降低普通羊羔的鲜重。脂肪胺疏水物的组成与草甘膦对普通小羊草的植物毒性无关。

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