RU2617322C1 - Method for increasing yield of soybeans - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: method for increasing the yield of soybeans involves the treatment of growing plants with (4.6-dimetiltriazol-[1.5-a] pyrimidyl-2-sulfanyl)-4-fluorine acetanilide of formula I:

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

EFFECT: invention provides expanding the arsenal of soybean growth regulators enhancing its 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 by the fact that a method of increasing soybean productivity involves the treatment of vegetative plants (4,6-dimethyltriazolo- [1,5- a ] pyrimidyl-2-sulfanyl) -4-fluoroacetanilide of the formula I:

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

The closest analogue in properties (reference) is the drug - Carvitol, BP, (a 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 the interaction of 4,6-dimethyl-1,2,4-triazolo [1,5-b] pyrimidyl-3-thiol II with N- (4-fluorophenyl) amide of chloroacetic acid III, which was previously obtained by the interaction chloroacetyl chloride with 4-fluoroaniline:

The complete synthesis of 4,6-dimethyl-1,2,4-triazolo [1,5-b] pyrimidyl-3-thiol II is described in [Strelkov V.D., Dyadyuchenko L.V., Dmitrieva I.G. Synthesis of new herbicidal antidotes for sunflower. Krasnodar: Enlightenment-South :, 2014, p. 96].

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:

(4,6-dimethyltriazolo- [1,5- a ] pyrimidyl-2-sulfanyl) -4-fluoroacetanilide (compound I).

To a suspension of 1.0 g (5.6 mmol) of 4,6-dimethyl-1,2,4-triazolo [1,5-b] pyrimidyl-3-thiol II in 20 ml of DMF was added a solution of 0.31 g ( 5.6 mmol) KOH in a minimum amount of water and stirred for 0.5 h. Then, a solution of 1.05 g (5.6 mmol) of N- (4-fluorophenyl) chloroacetic acid amide III in 10 ml of DMF was poured and stirred for another 2 h The reaction mass is diluted with 30 ml of water, the precipitate formed is filtered off, washed with water, and dried. After purification by recrystallization, 2.55 g (72%) of target product I are obtained in the form of white crystals with a _{PL of} 176-177 ° C.

Found,%: C = 54.66; Η = 4.20; N, 21.38; S = 9.51. C ₁₅ H ₁₄ FN ₅ S;

Calculated,%: C = 54.37; H = 4.26; Ν = 21.13; S = 9.68.

¹ H NMR spectrum, δ, ppm (group): 2.59 (s, 3H, 4-CH ₃ ); 2.78 (s, 3H, 6-CH ₃ ); 3.72 (s, 2H, CH ₂ ); 6.48 (s, 1H, 5-N Ru); 7.21 ... 7.64 (m, 5H, Ar), 9.80 (br s, 1H, ΝΗ).

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. In addition, the use of the claimed (4,6-dimethyltriazolo- [1,5- a ] pyrimidyl-2-sulfanyl) -4-fluoroacetanilide improves the quality of beans - the protein content in seeds is increased by 1.8% in comparison with the control.

Thus, the present invention implements the indicated purpose, providing an increase in the yield of beans by 8.4 kg / ha (23.4%), while the standard contributes to an increase in yield by 4.8 kg / ha (13.4%).

Claims (3)

A method of increasing soybean yield, comprising treating vegetative plants (4,6-dimethyltriazolo- [1,5- a ] pyrimidyl-2-sulfanyl) -4-fluoroacetanilide of the formula I:

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