Preemergence method of selectively controlling weeds in crops of

Details Preemergence method of selectively controlling weeds in crops of Preemergence method of selectively controlling weeds in crops of

1979-11-21

1982-01-05

Hollrah, Glennon H.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 88, 71 90, 71 94, 71 95, 71 97, 71 98, 71100, 71103, 71105, 71106, 71108, 71109, 71111, 71118, 71120, 71124, A01N 4368, A01N 4340

Patent

active

043092101

ABSTRACT:
The present invention relates to a preemergence method of selectively controlling weeds in crops of cereals, and to a composition therefor.
Up to now it has been virtually impossible to use s-triazines, phenylureas and other photosynthesis inhibitors as preemergence herbicides in cereals, especially wheat and barley, because of their too potent action. This invention solves the problem by providing a composition for the preemergence control of weeds which, in addition to containing such photosensitive inhibitors, contains a diphenyl ether or pyridylphenyl ether derivative as antagonistic component which neutralizes or greatly diminishes the harmful action in cereals.
In particular, the admixture of known nuclear-substituted phenoxyphenoxyalkanoic acid derivatives or pyridyl-(2)-oxy-phenoxyalkanoic acid derivatives to commercially available 4,6-bis-alkylamino-s-triazines and phenylureas can influence the herbicidal action of these latter so advantageously that, in preemergence application, they no longer damage cereals when employed in conventional concentrations, without losing their potent action against weeds.

REFERENCES:
patent: 3492110 (1970-01-01), Hood et al.
patent: 4021228 (1977-05-01), Arneklev et al.
patent: 4233060 (1980-11-01), Bohner

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