SU589884A3 - Herbicide - Google Patents

Description

(54) FOOTBALL COMPOSITION

one

This invention relates to chemical agents for controlling weeds and undesirable vegetation, namely, herbicidal compositions on fxJHoee mixtures of organic substances.

Herbicidal compositions are known whose active ingredient is 3,5-dibromo-4-hydroxy-benonitrile 11.

Bicomponent herbaltic formulations are also known, one of the components of which is this compound. Such compositions include, for example, a composition whose active principle is. a mixture containing dihalo-4-hydroxybenzonitrile and 3-alkyl-2,1,3-benzothia-aiazinone-4 2j dioxide.

However, the known herbicidal compositions of this group are not sufficiently effective.

The purpose of the invention is to obtain a new herbaceous composition for simultaneous predation (neither wild oats and broad weeds).

 This goal is achieved by the fact that, as a nitrogen-containing heterocyclic

GO compounds use the salts of 1,2-d methyl-3,5-dnfennlpyrazolina of the general formula

SvN5- | SvH5 Ijt; jf X

It

SNS SNZ

where X is the anion of the inorganic acid,

and 3,5-dibromo-4-hydroxybevzonitrnl of the formula OH is used as the nitrile substituted by benzoic acid;

The weight ratio of the components of the mixture is in the range of 2-4: 1, respectively.

The form of application of the composition described is usual: solutions, emulsions, pastes or powders. They are prepared by known methods.

Example. Plants of wild oats were grown in a greenhouse in special boxes until the fourth stage of appearance. After this, the leaves were sprayed with an aqueous solution of the active ingredient: 1,2-dimethyl salt of 3,5-diphenippirasoliva (per cation), 3,5-4,66-4- hyaroxy benzonitrile and a mixture of these two components. The solution in each case contained OD weight. % of surface-act liBHoro, substances wa. Untreated plants served as controls. Evaluation of the herbicidal action was carried out four weeks after treatment by cutting and weighing the leaves. Table 1 shows data that indicate the compatibility of the components of the mixture.

In further experiments, wild oats, yellow evening feast, wild and ball mustard were used as testes. It was found that when using 3,5-c 1ibrom-4-hydroxybenzonitrile (bromoxynil) in an amount of OD4 kg / ha, wild oats were not damaged at all, and the yellow evening party, wild mustard and mustard ball were completely destroyed. The use of 1,2-dimethyl-3,5-diphenylpyrazoline salts in a dose of Oj672 kg / ha (by cation) leads to the defeat of wild oats by about 8O%. . When using a mixture of the above components, it is achieved complete destruction of broadleaf weeds and the defeat of wild oats by about 90%. The results of nutrition are presented in table. I.

PRI mme R 2. Field testing of a mixture of 1,2-dimethyl-3,5-diphenylpyrazoline salt (DMDPA) and 3,5-dibromo-4-hydroxybenzonitrile. for weed control in cereal crops.

The test plots were treated with this mixture in the form of an aqueous solution after the appearance of seedlings of cereals and the obvious signs of contamination of the plots with weeds. Evaluation of the effectiveness of the herbal composition was carried out one and a half months after treatment. Table 2 presents the results of testing the effectiveness of the mixture in the fields of the harvester; in table 3 - in winter wheat crops; in Table 4, in barley crops.

Table 1

1,2-dimethyl-3,5-diphenylpyrazoline methyl sulfate 0.672

1,2 ".dimethyl-3,5-diphenylpyrazoline

chloride

Water

1D2

0.43 0.56 1D2

99

er 1D2 0.56 1D2 0.28 1D2 0.56

79

89

83 O

Oj672

86 o

Table 2

100 97 99

99 98 90 99 99 99

99

Table3

I T a b l and c a 4