SU651640A3 - Herbicide composition - Google Patents

Description

The invention relates to chemical agents for controlling weeds and undesirable vegetation, and to herbicidal compositions containing, as an active ingredient, synergistic mixtures of organic compounds. Known herbicidal composition based on 3-alkoxycarbonylaminophenyl-N- (methylphenyl) carbamate (1. Its effectiveness is S dose of 1 kg / ha and is insufficient to control some resistant weeds. Herbicidal compositions based on mixtures of N- (3-methylphenyl) carbamate with 2- (methachlorophenyl) -4H-3,1-benzoxazin-4-one 2 and Z-methyl-4-amino-6-phenyl-1, 2,4-triazin-5 -on 3. The whole of the invention is a new herbicidal composition based on 3methoxycarbonylamino-N- (3-methylfeNyl carbamate of the formula (hereinafter referred to as Fenmedipham) possesses superior herbicidal activity. The goal is achieved by addition of a cyclohexanedione-1,3 derivative of the general formula </ BR> where ethyl, propyl; ethyl, allyl; X is methyl, isopropyl, methoxycarbonyl; n is 1; 2 or 3, or its sodium salt, the weight ratios of the components of the herbicidal composition being in the range of 75:25 to 25:75, respectively. The form of application of the composition according to the invention is conventional: solutions, emulsions, pastes, powders, etc. They are prepared by known methods, the content of active substances in these formulations 5-95 weight L,

The pre-proposed composition can be used as a pre-emergence and post-emergence treatment. .VB composition of this composition includes the following compounds of general formula {II) - derivatives of cyclohexanedione-1, 3: - - -

2- (1-ethoxyamipo) -propylpden- (5 isopropylcyclohexanedione-, 3 (1)

2- (1-allyloxyamnpo) -propyl-inden-5, 5-dimethyl-cyclohexaidio-1,3 (no. 2);

2- (1-allyloxnamio) -butylidene | -5, 5-dimethylcyclohexanedione 1,3 (№ 3)

2 - {- 1 allyloxyamio) butyl-1-4-methoxycarboni / -5,5-methylmethylcycloxy-1,3-1,3 (1 4); ,;

2- (1-allyloxyamino) sodium salt of 4-methoxycarbonyl-5,5-dimethyl-nitrohexacid fia-f 3; (No. 5} /

The following examples 1 ll rim the effectiveness of the composition according to the invention in comparison with the effectiveness of its individual components.

Example 1. Pilot plants grown in greenhouse conditions up to the 4-leaf stage are treated with water (emulsion of lean substances (mixtures and individual components of the mixtures).

Herbicidal activity is determined three weeks after treatment and is prepared by weighing the plants. The best results are presented in Table 3. 1 (where the numbers of the compounds are derivatives: cyclohexanedione--, 3 correspond to their numbers indicated above). . ,

Example 2. The experiment was carried out in the conditions of example .1, but with other test plants.

Gerbididal activity is assessed by weighing the experimental plants and I. express in relative values compared to the weight of untreated plants. The results of the experiment are presented in Table. 2

Presented in table. 1 and 2, the results indicate a significantly higher efficacy of the herbaceous composition based on seysey compared to its individual components, i.e. about the presence of synergies.

+

0.50 + 0.50 4.7

Fenmedifam + Compound 2 0.50 + 0.50 5.5

Table 1

4.3

9.0

3.9

9.4

Table 2

Continuation of table 2