Enhanced method of killing weeds with glyphosate herbicide

Details Enhanced method of killing weeds with glyphosate herbicide Enhanced method of killing weeds with glyphosate herbicide

2005-06-21

2005-06-21

Pryor, Alton N. (Department: 1616)

Plant protecting and regulating compositions

Plant growth regulating compositions

C504S206000

Reexamination Certificate

active

06908882

ABSTRACT:
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 C8-24linear or branched, saturated or unsaturated hydrocarbyl group, and the second surfactant has the formulain-line-formulae description="In-line Formulae" end="lead"?R—CO—NR′—(CR′2)n—COOMin-line-formulae description="In-line Formulae" end="tail"?where R is a C7-23linear 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, C1-4alkyl 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.

REFERENCES:
patent: 5710103 (1998-01-01), Magin et al.
patent: 5985798 (1999-11-01), Crudden
patent: WO 95/16352 (1995-06-01), None
patent: WO 97/03560 (1997-02-01), None
patent: 9921423 (1999-05-01), None
patent: WO 99/62338 (1999-12-01), None

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