RU2293459C2 - Composition to increase effectiveness of seed pretreatment - Google Patents

Abstract

FIELD: agriculture, in particular composition to increase effectiveness of summer wheat seed hydrophobization.

SUBSTANCE: claimed composition is obtained by addition of the next components (mass %): paint oil 25; tetraethoxysilane 25; polyoxyalkylene/organosiloxane block copolymer 50 in amount of 0.2-3 % into 2 % surfactant aqueous dispersion.

EFFECT: improved composition for seed pretreatment.

4 tbl, 4 ex

Description

The present invention relates to agriculture, the creation of agricultural chemicals.

The leading strategy for the use of chemical plant protection products for pre-sowing seed preparation is the use of film-forming compounds (Lebedintseva O.V., Tyuterev S.L. Strategy and tactics of using protective-stimulating compounds for seed treatment of agricultural crops // Agrochemistry, 1994, No. 10. - S.67-79). Of the various methods of presowing seed preparation, hydrophobization is the best (Korzinnikov Yu.S., Tagaeva E.Yu., Troyazikov D.D. Chemical means of presowing preparation of seeds // Intellectual and material resources of Siberia. Irkutsk: IGEA, 2001, p. 46- 51). The disadvantage of the method of hydrophobization of seeds is unsatisfactory sanitary conditions due to the use of organic solvents, in particular chloroform (Dudka E.L. Film-forming seed dressers // Protection of grain from pests and diseases with intensive technologies. Dnepropetrovsk: Research Institute of Maize, 1990, p .67-69). This disadvantage is eliminated by the method of presowing preparation of seeds according to the prototype (Boriskin VD and other Method of presowing preparation of seeds. Application for patent of the Russian Federation No. 2002133265, priority December 9, 2002).

The advantage of hydrophobization is the predominance of hydrophobic groups (CH, CH ₂ , CH ₃ ) in the film, for example

The prototype method is based on the use of an aqueous dispersion of PVA - polyvinyl acetate - [CH ₃ —CH (OCOCH ₃ )] _n . In this film, the ratio of hydrophilic (CO, SON, COOH) and hydrophobic groups is almost balanced. The disadvantage of the prototype method is the lack of efficiency when sowing seeds in cold soil, which is important for early spring crops in the conditions of a short growing season in Eastern Siberia.

The aim of the invention is to increase the efficiency of hydrophobization of seeds using an aqueous emulsion of PVA. To increase the hydrophobicity and effectiveness of the aqueous PVA dispersion, a hydrophobizing composition is proposed, including, wt.%: Drying oil - 25, tetraethoxysilane - 25, polyoxyalkyleneorganosiloxane block copolymer - 50. Drying oil based on vegetable oils (fatty acids with one double bond C = C, for example, oleic acid CH ₃ (CH ₂ ) ₇ CH = CH (CH ₂ ) ₇ COOH) is widely used in everyday life as a film former for coating various surfaces. Tetraethoxysilane and polyoxyalkyleneorganosiloxane block copolymers are patented as a composition for pre-sowing preparation of grain and buckwheat seeds before sowing (Korzinnikov Yu.S. et al. Composition for treating grain and buckwheat seeds before sowing. RF patent №2117430, Bull. No. 18, 1998) . It is not known the use of an oil-containing composition to increase the hydrophobization efficiency of spring wheat seeds before sowing. The composition to increase the efficiency of the method of pre-sowing preparation of seeds (according to the prototype) is used with an aqueous dispersion of PVA 2% manually or using a standard set of machines - PS-10, Mobitox, etc.

The invention is disclosed by the following examples.

Example I. The influence of the inclusion of the composition to increase the efficiency of hydrophobization in a 2% aqueous dispersion of PVA on the growth of roots of spring wheat Tulunskaya-12 at a temperature of 20 ° C is studied in Petri dishes. The seeds dried after processing are germinated on wet filter paper, after 9 days the root length is measured. The results are presented in table 1.

The inclusion of a hydrophobizing composition in 2% PVA enhances the growth of the roots of spring wheat Tulunskaya-12 at a temperature of 20 ° C.

Table 1
The effect of including hydrophobizing composition - HS in a 2% aqueous dispersion of PVA on the growth of Tulunskaya-12 wheat roots at 20 ° С Option The average root length, cm on the 9th day of germination 1. Control - water 8.90 2.2% PVA - prototype 7.85 3.2% PVA + HS 0.2% 8.68 4.2% PVA + HS 0.4% 8.78 5.2% PVA + HS 1.0% 9.70 6.2% PVA + HS 2.04% 9.09 7.2% PVA + HS 3.0% 8.88

Example II The effect of the “hydrophobizing composition” on the mold of seeds is studied at a temperature of 6 ° C. The seeds dried after processing are germinated on wet filter paper at a temperature of 6 ° C in a domestic refrigerator. After 17 days, the amount of moldy seeds is considered. The results are presented in table.2.

table 2
The effect of the inclusion of hydrophobizing composition - HS in a 2% aqueous dispersion of PVA on the amount of moldy seeds at 6 ° C Option The amount of moldy seeds,% 1. Control - water 9.0 2. Background - 2% PVA - (prototype) 5,0 3. Background + HS 1.0% 0.5

The inclusion of a “hydrophobizing composition” in 2% PVA in an amount of 1.0% reduces the number of moldy seeds of spring wheat by 10 times.

Example III In a soil environment, the effectiveness of a hydrophobizing composition is studied under variable temperatures: swelling and peeling at 20 ° C, then germination and growth at 6 ° C.

The results are presented in table.3.

Table 3
The influence of the inclusion of a hydrophobizing composition - HS in 2% PVA on the efficiency of hydrophobization of spring wheat seeds when germinated in a soil medium at a variable temperature of 20 ° C / 6 ° C Option Moldy seeds,% 1. Control 28 2.2% PVA eighteen 3.2% PVA + HS 1% 16

Example IV The effectiveness of the hydrophobic composition of the HS on the strength of the retention of plant protection products on the surface of spring wheat grain after 3 days of drying and repeated shaking is studied by the amount of dry film and disinfectant that has crumbled - UDZ (ultrafine iron).

The results are presented in table 4.

Table 4
The effect of the inclusion of a hydrophobizing composition - HS in 2% PVA on the shedding of a dry film and protectant - UJ Option The mass of dry PVA and UJ applied to the seeds, kg / ton The mass of showered PVA and UJ kg / t % % of the initial amount 1. Prototype - 2% PVA 14.5 4,750 one hundred 32.76 2. PVA + HS 1% 14.5 4,125 87 28.40

The inclusion of a water-repellent composition in 2% PVA increases the retention of PVA and protectant on the surface of the grain after drying and shaking.

Conclusion: The inclusion of a hydrophobizing composition: drying oil - tetraethoxysilane - polyoxyalkylene organosiloxane block copolymer in the ratio, wt.%: 25-25-50, respectively, increases the efficiency of hydrophobization by the effect on seed mold, root growth and retention of protective equipment on the surface of spring wheat seeds.

Information sources

1. Boriskin V.D., Kamenkov AV., Korzinnikov Yu.S., Gavrilov A.K. Aquahydrophobization is a method of pre-sowing preparation of seeds. Application for patent of the Russian Federation No. 2002133265/12, priority 09.12.2002, the prototype.

2. Pipe E.L. Film-forming seed dressers // Protection of Cereals from pests and diseases with intensive technologies. Dnepropetrovsk: Research Institute of Corn, 1990. - P.67-69.

3. Korzinnikov Yu.S., Chernyshev EA, Golubev V.N. Composition for processing seeds of grain and buckwheat before sowing. RF patent №2117430, Bull. No. 18, 1998

4. Lebedintseva OV, Tyuterev S.L. Strategy and tactics of using protective-stimulating compounds for seed treatment of agricultural products cultures. // Agrochemistry, 1994, No. 10. - S. 67-79.

Claims (1)

Composition to increase the hydrophobization efficiency of spring wheat seeds before sowing using a 2% aqueous dispersion of PVA-polyvinyl acetate, characterized by adding in 2% PVA a composition containing, wt.%: Drying oil - 25, tetraethoxysilane - 25, polyoxyalkyleneorganosiloxane block copolymer - 50, in an amount of 0 , 2-3%.