Herbicidally active unsaturated esters of halogenated .alpha.-[4-(pyridyl-2'-oxy)-phenoxy]-propionic acids
AssigneeCiba-Geigy Corporation
InventorsBeat Bohner, Hermann Rempfler, Rolf Schurter
Life of this patent
Estimating the term…
Abstract
A class of herbicidal unsaturated esters of .alpha.-[4-(3',5'-dihalogeno-pyridyl-2'-oxy)-phenoxy]-propionic and -thiolpropionic acid of the formula ##STR1## wherein Hal is chlorine or bromine, X is oxygen or sulfur, and R is an unsubstituted or halogenated aliphatic or alicyclic radical which may contain nitrogen, and which possesses at least one double and/or triple bond, with the proviso that if X is oxygen, R is not an unsubstituted alkenyl radical. These new esters are useful for selective post-emergent control of grassy weeds in cultivated plants such as wheat, barley, rice and soybean.
Claims10
The compound of the formula ##STR59##
The compound of the formula ##STR60##
The compound of the formula ##STR61##
A herbicidal composition comprising an effective amount of (1) a compound selected from the group consisting of ##STR62## and ##STR63## and (2) a carrier.
The method for selectively controlling monocotyledonous weeds and cultivated plant crops which comprises applying thereto a herbicidally effective amount of the compound of the formula ##STR64##
The method for selectively controlling monocotyledonous weeds in cultivated plant crops which comprises applying thereto a herbicidally effective amount of the compound of the formula ##STR65##
The method for selectively controlling monocotyledonous weeds in cultivated plant crops which comprises applying thereto a herbicidally effective amount of the compound of the formula ##STR66##
Dependencies are inferred from the claim text.