The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1982
Filed:
Nov. 21, 1979
Marco Quadranti, Brugg, CH;
Hans-Rudolf Gerber, Pratteln, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
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.