RU2629229C1 - Method for increasing yield of soybeans - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: method for growing soybeans involves treating N-(2-iodophenyl)amide 3-amino-4,6-dimethylthieno [2,3-b]pyridyl-2-carboxylic acid in an amount of 30 g/ha in a phase of 6-7 leaves and in the budding phase.

EFFECT: method ensures an increase in soybean yield.

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Description

The invention relates to agriculture and can be used in the cultivation of soy.

Plant growth regulators are one of the most promising groups of pesticides, and it is no coincidence that every year it is replenished with new drugs. The advantage of growth regulators is that they have a significant effect on the growth and physiological processes occurring in the plant, allowing a person to control the development of the latter in the direction necessary for himself. The use of growth regulators provides, for example, the solution of such problems as increasing the yield and quality of cultivated products, increasing resistance to diseases and stressful situations, and much more (Plant Protection and Quarantine - 2008. - No. 12. - P. 54).

The objective of the invention is to expand the arsenal of soybean growth regulators.

The technical result of the invention is to increase soybean yield.

This result is achieved in that a method for increasing soybean productivity involves treating vegetative plants with N- (2-iodophenyl) amide 3-amino-4,6-dimethylthieno [2,3-b] pyridyl-2-carboxylic acid of the formula I:

in an amount of 30 g / ha in the phase of 6-7 leaves and 30 g / ha in the phase of budding.

The closest analogue in properties (reference) is the drug - Carvitol, BP, (registrant of OJSC MCC EuroChem), which is used to increase yields on soybeans (see the State Catalog of Pesticides and Agrochemicals Permitted for Use in the Russian Federation. Ministry of Agriculture of Russia Moscow - 2014).

The synthesis of the active substance was carried out by the authors by a two-stage method (Scheme 1) - the interaction of 3-cyano-4,6-dimethyl-1 (H) pyridin-2-thione II with an equimolar amount of KOH and N- (2-iodophenyl) amide of chloroacetic acid at a temperature 20-25 ° C followed by cyclization, without isolation of intermediate III (Dmitrieva I.G. Diss for the degree of candidate of chemical sciences. Kuban State Agrarian University. Krasnodar. 2007):

Scheme 1

In this case, the starting 3-cyano-4,6-dimethyl-1 (H) pyridin-2-thion II was obtained by the reaction of 4,6-dimethyl-2-chloro-nicotinonitrile with thiourea according to a known method (Arm. Chemical. - 1994. - T. 47 - No. 1-3. - S. 143-146), scheme 2:

Growth-regulating activity was determined according to the standard TsINAO methodology (Brief guidelines for conducting state tests of plant growth regulators. TsINAO. Moscow - 1984 - p. 20).

Synthesis Method:

Synthesis of 3- amino-4,6-dimethylthieno [2,3-b] pyridyl-2-carboxylic acid N- (2-iodophenyl) amide (compound I).

To a suspension of 0.72 g (4.4 mmol) of 3-cyano-4,6-dimethyl-1 (H) -pyridinethione-2 in 15 ml of purified DMF, a solution of 0.25 g (4) is added dropwise with stirring at room temperature. , 4 mmol) of KOH, dissolved in a min amount of water, is stirred until the precipitate is completely dissolved and a solution of 1.3 g (4.4 mmol) of N- (2-iodophenyl) chloroacetic acid amide in 5 ml of DMF is added dropwise. Stirring is continued at the same temperature for another 1 hour, then a solution of 0.25 g (4.4 mmol) of KOH in min of water is added to the reaction mixture and stirred for another 40 minutes. The reaction mixture was diluted with 50 ml of water, the precipitate formed was filtered off, washed with water and dried. After recrystallization from DMF, 1.2 g (67%) of the expected product are obtained in the form of a white, fine-crystalline powder with T _pl. 242-244 ° C.

Found,%: C 45.66; H 3.51; N, 9.80. C ₁₆ H ₁₄ IN ₃ OS;

Calculated,%: C 45.40; H 3.34; N, 9.93.

¹ H NMR spectrum, δ, ppm (group): 2.52 (3H, s, 6-CH ₃ Py); 2.75 (3H, s, 4-CH ₃ Py); 6.88 (2H, br s, NH ₂ ); 7.09 (1H, m, 5-H Py); 7.30-7.91 (4H, m, Ar-H); 8.99 (1H, br s, NH).

The growth-regulating activity of the synthesized compound on soybean plants of the Selecta cultivar was assessed in the experimental field of VNIIBZR. Etalon Carvitol, BP was used in the recommended amount of 200 ml / ha for soy.

Soy plants were treated with an aqueous solution of the synthesized compound twice: in the phase of 6-7 leaves (dose of 30 g / ha) and in the budding phase (dose of 30 g / ha) and Carvitol, BP solution in the same phases (dose of 200 ml / ha) s the working fluid flow rate is 300 l / ha.

Spraying was carried out using an OEMP-16 sprayer. The experimental plot area is 7 m ² , the repetition is 4-fold, the allocation of plots is consistent. Harvesting was carried out during the period of full ripening of beans with the help of a small-sized combine Hege-125.

Growth-regulating activity was determined by increasing the yield of bean plants processed according to the proposed method and the reference method, in comparison with the control (untreated plants).

The data obtained are presented in the table.

Tests conducted on soybean plants, it was found that the claimed compound I, when applied twice at a dose of 30 g / ha, exhibits the properties of a growth promoter. This compound had a positive effect on the formation of the main elements of the crop structure: productive branching, number of beans, grafting and mass of grain, which were higher than in the control.

Thus, the present invention implements the indicated purpose, providing an increase in the yield of beans by 7.3 kg / ha (22.8%), while the standard helps to increase yield by 4.7 kg / ha (14.7%).

Claims (3)

A method for increasing soybean yield, comprising treating vegetative plants with N- (2-iodophenyl) amide 3-amino-4,6-dimethylthieno [2,3-b] pyridyl-2-carboxylic acid of the formula I:

in an amount of 30 g / ha in the phase of 6-7 leaves and in the phase of budding.