RU2275805C1 - Method for protecting of growing sun flower plants from injuring effect of 2,4-d - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: method involves treating plants with 3-amino-2-N-[4-chlorobenzene)carbamido]-4,5,6-trimethylthieno-[2,3-b]-pyridine used in an amount of 200 g/hectare five days after application of herbicide. Method provides for protection of growing sunflower plants from injuring effect of 2,4-D.

EFFECT: increased yield of sun flower as compared to control sun flower plant treated with herbicide.

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Description

The invention relates to a technology for the protection of cultivated plants from the damaging effects of herbicides.

A known method of protecting vegetative crops from the damaging effects of herbicides, providing for their treatment with an antidote after using the herbicide (Pitina M.R. et al. The current level and promising areas of crop protection against undesirable effects of the use of herbicides // Agrochemistry, 1986, No. 4, p. .107-136).

The objective of the invention is to expand the arsenal of antidotes of sunflower from the damaging effects of 2,4-D.

The technical result of the invention is the protection of vegetative sunflower plants from the damaging effects of 2,4-D, which is expressed in an increase in yield compared to a herbicide-treated control.

This result is achieved by the fact that in the method for protecting vegetative sunflower plants from the damaging effects of 2,4-D, which involves treating them with an antidote after using the herbicide, 3-amino-2- [N- (4-chlorobenzyl) carbamido is used as an antidote ] -4,5,6-trimethylthieno [2,3-b] pyridine in an amount of 200 g / ha 5 days after using the herbicide.

The synthesis of the antidote was first carried out by the authors according to the scheme:

Synthesis technique.

A 3-cyano-4,5,6-trimethyl-2-pyridinethione K-salt was prepared by adding a solution of 0.34 g (5 mmol) KOH and 2 ml of water to 1 g (5 mmol) of the latter and 14 ml of dimethalformamide. To the resulting solution was added a solution of 1.33 g (5 mmol) of 4-chlorobenzylchloroacetamide in 8 ml of dimethylformamide and stirred for 2 hours (TLC control until the starting compound disappeared). After that, a solution of 0.34 g of KOH in 2 ml of water was poured and kept for 1 h. The reaction mixture was diluted with 25 ml of water, the precipitate was filtered off, washed with water, and dried. After recrystallization from acetone, 1.46 g (81% of theory) of the target product with _Tm = 196-197 ° C are obtained.

The antidote activity of the obtained compound in sunflower plants was evaluated in the experimental field of VNIIBZR. The known antidote 2,4-D, sulfalene, was used as a reference (List of pesticides and agrochemicals permitted for use on the territory of the Russian Federation. Supplement to the journal “Plant protection and quarantine”, 2002, No. 6). The standard was used in the recommended amount for sunflower 200 g / ha at a flow rate of 300 l / ha. The tests were carried out according to the following procedure.

In the field, sunflower plants of the VNIIMK-8883 cultivar were treated with 2.4 dichlorophenoxyacetic acid butyl ether at a dose of 18 g / ha in a 10-16 leaf phase and after 5 days a solution of the obtained compound was applied at a dose of 200 g / ha with a working fluid flow rate of 300 l / ha.

In the experiment, the following options are provided:

1. Herbicide (control).

2. Herbicide + antidote (claimed).

3. Herbicide + antidote (standard).

4. Control (untreated plants).

The experiments were carried out on plots with an area of 3 m ² , five repetition. Harvesting of sunflower seeds was carried out at the time of complete ripening of seeds.

The antidote effect of the synthesized compound and the standard was determined by the absolute value of the addition to the herbicidal control and in percentage by the formula:

A _x - antidote effect,%;

A - crop in the variant antidote + herbicide;

E - crop in the standard version (herbicide).

The data obtained are statistically processed using t - student criterion.

The test results are presented in the table.

Table. Antidote activity against 2,4-D synthesized compounds. Antidote Dose of antidote, g / ha Experience Options 2,4D (control) 2,4-D + antidote productivity, kg / ha productivity
c / ha Antidote activity%
c / ha Synthesized Compound 200 16.5 20,0 21.2 * 3,5 Reference 200 16.5 19.6 18.8 * 3,1 The control - 36.9 - - -

* The differences between the options "antidote + herbicide" and "herbicide (control)" are significant at P = 0.90.

Thus, the present invention allows to provide an antidote effect at the level of 21.2%, against 18.8% of the standard.

Claims (1)

A method for protecting vegetative sunflower plants from the damaging effects of 2,4-D, comprising treating them with an antidote after using the herbicide, characterized in that 3-amino-2- [N- (4-chlorobenzyl) carbamido] -4.5 is used as an antidote , 6-trimethylthieno [2,3-b] pyridine in an amount of 200 g / ha 5 days after using the herbicide.