Enhanced method of killing weeds with glyphosate herbicide

提供了增强草甘膦除草剂除草活性的一种方法。该方法包括向草甘膦除草剂中添加第一种表面活性剂和第二种表面活性剂的混合物，全部表面活性剂与草甘膦的重量比为约1∶30至约2∶1。其中第一种表面活性剂的化学结构中含有阳离子或可质子化的氨基基团和C#-[8-24]直链或支链、饱和或不饱和烃基；第二种表面活性剂具有化学式R-CO-NR'-(CR'#-[2])#-[n]-COOM，其中R是C#-[7-23]直链或支链、饱和或不饱和烃基，n是1至4，M是氢或阳离子抗衡离子，R'基团彼此独立地是氢、C#-[1-4]烷基或基团-(CH#-[2])#-[m]-COOM，其中m是1至4和M是上面刚提到的定义，条件是不多于1个的R'基团是基团-(CH#-[2])#-[m]-COOM。第一种与第二种表面活性剂重量比是约1∶10至约10∶1。还提供了按上述方法制备的除草剂组合物。第一种和第二种表面活性剂在增强草甘膦除草剂除草活性方面显示出一种协同作用。 A method is provided of enhancing the herbicidal activity of a glyphosate herbicide, comprising adding to the glyphosate herbicide a mixture of a first surfactant and a second surfactant at a weight ratio of total surfactant to glyphosate of about 1:30 to about 2:1, wherein the first surfactant has a chemical structure comprising a cationic or protonatable amino group and a C8-24 linear or branched, saturated or unsaturated hydrocarbyl group, and the second surfactant has the formula R-CO-NR'-(CR'2)n-COOM where R is a C7-23 linear or branched, saturated or unsaturated hydrocarbyl group, n is 1 to 4, M is hydrogen or a cationic counterion, and R' groups are each independently hydrogen, C1-4 alkyl or a group -(CH2)m-COOM where m is 1 to 4 and M is as defined immediately above, with the proviso that no more than one R' group is such a group -(CH2)m-COOM; the weight ratio of the first to the second surfactant being about 1:10 to about 10:1. Also provided is a herbicidal composition prepared according to the above method. The first and second surfactants exhibit a synergistic interaction in enhancing herbicidal activity of the glyphosate herbicide.