RU2646096C2 - Method of increasing yield of winter wheat - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention refers to agriculture. Vegetative plants are treated with N-(2-iodophenyl)amide of 3-amino-4,6-dimethylthieno[2,3-b]pyridyl-2-carboxylic acid of formula I:

I in the amount of 40 g/ha during the phase of tillering and during the phase of the flag sheet in order to increase the yield of winter wheat.

EFFECT: invention enables to realize the specified purpose.

1 cl, 1 tbl

Description

The invention relates to agriculture and can be used for growing wheat.

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 wheat growth regulators.

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

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

40 g / ha in the tillering phase and 40 g / ha in the phase of the flag leaf.

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-thion 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):

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) KOH dissolved in a min amount of water, stirred until the precipitate was completely dissolved and a solution of 1.3 g (4.4 mmol) of N- (2-iodophenyl) chloroacetic acid amide in 5 ml of DMF was 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 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 Ru); 2.75 (3H, s, 4-CH ₃ Py); 6.88 (2H, br s, NH ₂ ); 7.09 (1H, m, 5-N Ru); 7.30-7.91 (4H, m, Ar-H); 8.99 (1H, br s, NH).

Assessment of the growth-regulating activity of the synthesized compound on winter wheat plants of the Kalym variety was carried out in the experimental field of the All-Russian Scientific Research Institute of Biological Reserves. The well-known growth regulator Bigus, BP (“State catalog of pesticides and agrochemicals approved for use on the territory of the Russian Federation”. Ministry of Agriculture of Russia. Moscow - 2014) was chosen as a standard. The standard was used in the recommended amount of 250 ml / ha for wheat.

Kalym winter wheat plants were treated with an aqueous solution of the synthesized compound twice in the tillering phase (dose 40 g / ha) and in the flag leaf phase (dose 40 g / ha) and Bigus solution, BP in the same phases (dose 250 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 8 m ² , the repetition is 4-fold, the allocation of plots is consistent. Wheat harvesting was carried out during the period of full ripening of grain.

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

The data obtained are presented in the table.

Tests conducted on winter wheat showed that the synthesized compound I, when applied twice at a dose of 40 g / ha, exhibits the properties of a growth promoter.

Thus, the present invention implements the indicated purpose, providing an increase in wheat yield of 5.6 c / ha (11%), while the standard helps to increase productivity by 2.7 c / ha (5%).

Claims (3)

A method of increasing the yield of winter wheat, comprising treating vegetating 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 40 g / ha in the tillering phase and in the phase of the flag leaf.