SU884549A3 - Herbicide composition - Google Patents

Abstract

A synergistic herbicidal agent comprises a compound <IMAGE> wherein X is chlorine or bromine, Y is hydrogen if X is Cl or is chlorine if X is Br, and Z is (C1-C4)-alkyl, and a compound <IMAGE> wherein R is bromine or iodine and R1 is hydrogen, alkali metal, ammonium, formyl or alkanoyl having up to 8 carbon atoms. The invention also provides the use of such agents for the selective control of mono- and di- cotyledonous weeds in cereals.

Description

(5) HERBICID COMPOSITION The invention relates to chemical-KIM means for controlling undesirable vegetation in crops of cultivated crops, namely to compositions containing as an active substance mixtures based on halogen-substituted phenoxy-phenoxy-propionic acid derivatives, the known herbicidal composition based on halogen-substituted phenoxy-phenoxy-propionic acid. (4-chlorophenoxy) phenoxy-propionic acid or methyl 2- (2-chloro-bromophenoxy) phenoxy-methyl ester, which selectively destroys oats, foxtail, millet chicken in grain crops D3 and X2 .: Also known is the herbicidal composition based on 3.5 Diyod-oxy-benzoylitrile or 3 5 Dibromo-oxy-benzonitrile, which effectively affects broadleaf weeds (quinoa, chamomile) 3 and f. However, the spectrum of action of the known herbicidal compositions is due to a specific arsenal of weeds: either cereal or broadleaf. The purpose of the invention is to increase the herbicidal activity and selectivity of action. The goal is achieved by the fact that the herbicidal composition containing the ester derivatives is halogen-substituted by the 1st phenoxyphenoxypropionic acid of the general formula, where X is chlorine or bromine, Y is hydrogen, if X is chlorine, or chlorine, if X bromine 5 Z is methyl or isobutyl, optionally contains derivatives

3,5 Dihalo-α-oxybenzoiitrile of the general formula

C V.

where R is bromine or iodine, with weight

relation 1: (o, 1-6,67). Example: The synergistic interaction of the components of the mixture was studied, but for compound 1 - methyl ester of (2-chloro-bromophenoxy) -fe8 5 9 4

noxy-propionic acid, compound II - isobutyl ester 2-f4- (-chlorophenoxy) -phenoxy-propionic acid, compound III - 3,5-DiyodJ - "- hydroxybenzonitrile and compound IV3 5 Dibromo-oxybenzonitrile in winter and summer grain crops cultures.

Test plants quinoa, chamomile, lepchitsa and wild oats.

The OB table shows the results of the synergistic interaction between halogen-substituted phenoxy-phenoxy-propionic acid and derivatives of 3,5-diHalogen-4-hydroxybenzonitrile.

Leper MlО-13 0, 721 +11111 (22.57) 30 (28.8) 20-33-50 0 (40.37) 50 (55.5) 80

The table shows the calculated (in parentheses and actual data on the herbicidal activity of the synergistic mixture and the individual components taken.

Calculations on herbicidal activity are carried out according to the formula E x + y - (ddL where) is the percentage of dead test plants when treated with component A, y is the percentage of dead plants when treated with component B, E is the calculated effect.

chlorine, if X is bromine, Z is methyl or isobutyl, characterized in that, in order to enhance the herbicidal action and the manifestation of a synergistic effect, it additionally contains derivatives of 3 halogenoxybenzonitrile of the general formula

to

.

Claims (4)

Invention Formula A herbicidal composition comprising halogen-substituted phenoxy-phenoxy-propionic acid derivatives of the general formula C, OCHCOOZf where X is chlorine or bromine; Y is hydrogen if X - chlorine, or where R is bromine or iodine, with a weight ratio of 1: (0.1-6.67). Sources of information taken into account in the examination To the Patent of Germany No. 222ZE, cl. 81 C 27/00, 1972 (prototype). 2. Patent of Germany No. 2b015 8, cl. C 07 S 9/67, 02.07.77. 3. The patent of the Netherlands And 5 "11 52, cl. A 01 N, 19b5o 4.Melnikov N.N. Chemistry and pesticide technology. M., Himi, 197, with. 235.