RU2573375C1 - Fungicidal composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: composition contains components with the following ratio, wt %: active substances from class of azoles - 1.0-6.0 combination of non-ionogenic - 13.0-22.0 and anion-active - 18.0-27.0 surface-active substances and organic solvent - the remaining part. Active substance represents tebuconazole, or benomyl, or their mixture. As anion-active surface-active substance abietic acid, or calcium abietate, or magnesium abietate, or rosin, or calcium resinate, or magnesium resinate, or abietic acid nitrile, or abietic acid amide, or abietic acid triethanolamine, or levopimaric acid is used. Organic solvent is mainly aromatic. Composition is presented in form of emulsifying concentrate.

EFFECT: increased dispersibility and stability of working liquid, increase of fungicidal activity of composition and increase of crop yields.

3 cl, 3 tbl

Description

The invention relates to the fields of agriculture and woodworking and can be used in the preparation of compositions for seed treatment, as well as for protecting wood from biodefeats.

A known composition for seed dressing in the form of a suspension concentrate is a prototype (RU 2282961, publ. 09/10/2006, BI No. 25), including the active substance - tebuconazole, nonionic or anionic surfactant, filler, diluent.

The disadvantage of the drug is the relatively low dispersion of the particles of the solid phase of the suspension, which affects the biological activity of the composition.

Known fungicidal mixtures of synergistic action (RU 2166254, publ. 10.05.2001, RU 2420962, publ. 06/20/2011, RU 2432743, publ. 10.11.2011) to protect wood from biodefeat, in which one of the active substances is fungicidal triazole, in particular tebuconazole.

However, the fungicidal composition can be optimized by including environmentally friendly substances in it instead of the fungicidal active compound while maintaining biological effectiveness.

The objective of the present invention is to increase the dispersion and stability of the working fluid, increase the fungicidal activity of the composition, increase crop yields, and reduce environmental pollution.

The problem is solved due to the fact that the fungicidal composition contains an active substance from the class of azoles, a surfactant and an organic solvent, while it contains tebuconazole, or benomyl, or a mixture of them as an active substance, and a combination of nonionic as a surfactant a surfactant and an anionic surfactant from the group comprising abietic acid, or calcium abietate, or magnesium abietate, or rosin, or calcium resinate, Whether magnesium resinate, abietic acid or a nitrile, amide or abietic acid, abietic acid or triethanolamine, or levopimaric acid.

The proposed composition contains the following components,% wt .:

Active substance 1.0-6.0 Nonionic Surfactant 13.0-22.0 Anionic Surfactant 18.0-27.0 Organic solvent rest

As the active substance in the proposed composition use tebuconazole, or benomyl, or a mixture thereof.

Neonol Af 9-10, neonol Af 9-12, syntanol DS-10, syntanol ALM-10 are used as a nonionic surfactant.

Abietic acid, or calcium abietate, or magnesium abietate, or rosin, or calcium resinates, or magnesium resinate, or abietic acid nitrile, or abietic acid amide, or abietic acid triethanolamine, or levopimaric acid are used as the anionic surfactant.

The solvent used is an organic, mainly aromatic, solvent.

The use of calcium or magnesium salts of abietic acid, other resin acids, rosin, which are readily soluble in organic solvents, allows the composition to be used in a more effective form of an emulsifiable concentrate. The inclusion of calcium or magnesium in the composition of abietates and resinates promotes a high degree of disaggregation, a decrease in the particle size of the dispersed phase, an increase in the stability of the emulsion and an increase in the biological activity of the preparation.

The proposed fungicidal composition is used for dressing seeds of useful plants, as well as for protection against biodegradation of wood products intended for use in harsh conditions (poles, sleepers, etc.). The method of processing wood by the proposed composition is carried out by immersion, spraying with a sprayer, by brushing.

Example 1

3 g of tebuconazole, 20 g of neonol Af 9-12 and 25 g of calcium abietate are dissolved in 52 g of xylene. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 2

3 g of benomyl, 22 g of neonol Af 9-10 and 20 g of magnesium abietate are dissolved in 55 g of nephras A 130/150. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 3

3 g of tebuconazole, 3 g of benomyl, 15 g of syntanol DS-10 and 23 g of abietic acid are dissolved in 56 g of nefras AR 120/200. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 4

2 g of tebuconazole, 3 g of benomyl, 18 g of syntanol ALM-10 and 27 g of rosin are dissolved in 50 g of nefras A 150/330. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 5

1 g of tebuconazole, 22 g of neonol Af 9-12 and 21 g of calcium resinate are dissolved in 56 g of xylene. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 6

6 g of tebuconazole, 13 g of neonol Af 9-10 and 20 g of magnesium resinate are dissolved in 61 g of nephras A 130/150. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 7

5 g of benomyl, 20 g of syntinol DS-10 and 18 g of abietic acid nitrile are dissolved in 57 g of AP 120/200 nefras. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 8

1 g of benomyl, 13 g of syntanol ALM-10 and 25 g of triethanolamine abietic acid are dissolved in 61 g of nefras A 150/330. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 9

6 g of benomyl, 15 g of neonol Af 9-12 and 27 g of abietic acid amide are dissolved in 52 g of cyclohexanone. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 10

0.5 g of tebuconazole, 0.5 g of benomyl, 22 g of syntanol ALM-10 and 18 g of levopimaric acid are dissolved in 59 g of an oil solvent. The concentrate in an amount of 1 g is emulsified in 100 ml of water. Optical microscopy determines the mass fraction of particles of the internal phase with a size of less than 3 microns. The stability of a one percent emulsion is evaluated visually in a graduated sedimentation tank after four hours of sedimentation.

Example 11 is a prototype.

Analogously to example 1. The difference is that instead of calcium abietate take calcium alkylbenzenesulfonate.

Example 12 is a prototype.

Analogously to example 1. The difference is that sulfonol is taken instead of calcium abietate.

Example 13 is a prototype.

Analogously to example 1. The difference is that anionic surfactants are not added, and the amount of xylene is 77 g.

Example 14

Field tests are carried out on a pilot plot consisting of plots of 10 square meters. m each. Etched with emulsion barley seeds are planted in the soil at the rate of 2 c seeds per hectare. Accounting for the seed crop is carried out by continuous grinding of barley.

The prototype is a variant of the experiment where calcium or magnesium abietates were not used. Control is a variant of the experiment in which seed treatment was not carried out. Repeatability is fourfold. The barley crop in the control experiment was 19.8 c / ha.

Example 15

Tests for fungicidal and bactericidal activity are carried out by cultivating fungal spores in a dense nutrient medium (potato-glucose agar) in the presence of the test compound at a concentration of 0.003% of the active substance.

The test substances (examples 1-13) are introduced into the nutrient medium at a temperature of 45-50 ° C. After thorough mixing, the medium is poured into Petri dishes of 15 ml each. Test objects are sown on the surface of the frozen medium at three points equidistant from each other. Crops are kept in a thermostat at a temperature of 24-25 ° C for 72 hours, after which the diameter of the colonies is measured in two mutually perpendicular directions. In the control, test objects are incubated in the same medium, but without chemical preparations. The inhibition of the growth of fungal colonies in crops treated with the studied solutions of chemical compounds is determined by the formula

,

,

where R is the suppression of spore germination,%;

c ₀ - germination of spores in the control, mm;

c - germination of spores in the experiment, mm.

The data presented in table 1 indicate that the proposed composition when diluted with water forms a stable emulsion, has a higher dispersion. The mass fraction of particles of the internal phase with a size of less than 3 microns is 79-86%, while for the prototype - 48-65%. The barley crop is 24.0-25.2 kg / ha, which is significantly higher than that of the prototype (20.2-21.5 kg / ha).

The test results presented in table. 2, show good fungicidal and bactericidal activity of the claimed composition (examples 1-10) in comparison with the prototypes (examples 11-13). The suppression of spore germination in the presence of the claimed substances is 87-97%, while the prototype 48-66%.

Example 16

The resistance of the proposed compositions to leaching from impregnated wood is evaluated by the change in the resistance of the tested pine samples in relation to the most common wood-destroying fungus Coniophora cerebella.

During the experiment, the samples are impregnated with an antiseptic for 30 seconds by immersion, then placed under a stream of tap water for 2 hours. After that, the samples are placed in boxes with forest non-sterile soil (for exposure to the fungus Coniophora cerebella). The tests are carried out for 5 months (Biryulina NB. Development of a water-soluble preservative for wood ... Abstract of thesis ... Candidate of Technical Sciences / ASTU / Arkhangelsk, 1998. - 19 p.).

The destructive effect of the fungus is determined by the loss of mass of the wooden impregnated samples after testing. The results of the experiment are carried out in table. 3. The results indicate a high efficiency of the proposed composition for wood products from biodefeats.

Table 1 NN examples Active substance Nonionic surfactant Anionic surfactant Solvent Mass fraction of particles less than 3 microns,% Stability of 1% emulsion Barley harvest, t / ha one. 3 twenty 25 52 84 Sustainable 24.6 2. 3 22 twenty 55 81 Sustainable 24.3 3. 6 fifteen 23 56 83 Sustainable 24.6 four. four eighteen 27 51 86 Sustainable 25.1 5. one 22 21 56 82 Sustainable 24.2 6. 6 13 twenty 61 80 Sustainable 24.0 7. 5 twenty eighteen 57 79 Sustainable 24.0 8. one 13 25 61 84 Sustainable 25.0 9. 6 fifteen 27 52 82 Sustainable 24.4 10. one 22 eighteen 59 86 Sustainable 25,2 11 - prototype 3 twenty Calcium Alkylbenzenesulfonate 25 52 65 Unstable, precipitate 0.2 cm ³ 21.5 12 is a prototype 3 twenty Sulfanol 25 52 60 Unstable, precipitate 0.3 cm ³ 20.5 13 is a prototype 3 twenty - 77 48 Unstable, sediment 0.5 cm ³ 20.5

table 2 NN examples Inhibition of spore germination Fungicidal activity Bactericidal activity Fusarium culmorum Alternaria alternate Helminthosporium sativun Xanthomonas malvacearum one. 95 96 92 90 2. 93 90 91 94 3. 92 94 97 95 four. 89 96 90 92 5. 94 91 93 91 6. 96 90 97 90 7. 89 91 92 88 8. 88 92 90 87 9. 89 90 93 89 10. 87 88 91 88 11 - prototype 62 64 66 58 12 is a prototype 57 56 54 55 13 is a prototype 52 58 fifty 48

Table 3 Leach Resistance Test Results No. p / p A drug Without leaching After washing Weight loss of samples,% Micromycological characteristics of samples Weight loss of samples,% Micromycological characteristics of samples one. Example 1 3.2 No decay and infection detected 3.6 No decay and infection detected 2. Example 2 3.3 No decay and infection detected 3,7 No decay and infection detected 3. Example 3 3,1 No decay and infection detected 3,5 No decay and infection detected four. Example 4 3,1 No decay and infection detected 3,5 No decay and infection detected 5. Example 5 3.2 No decay and infection detected 3.6 No decay and infection detected 6. Example 6 3.2 No decay and infection detected 3,7 No decay and infection detected 7. Example 7 3.4 No decay and infection detected 3.6 No decay and infection detected 8. Example 8 3.4 No decay and infection detected 3.8 No decay and infection detected 9. Example 9 6.6 No decay and infection detected 3.8 No decay and infection detected 10. Example 10 3,1 No decay and infection detected 3.4 No decay and infection detected eleven. Control (untreated wood) 6.6 Well-developed mycelium of wood-destroying fungus, deep light brown rot 6.2 Well-developed mycelium of wood-destroying fungus, deep light brown rot

Claims (3)

1. A fungicidal composition containing an active substance from the class of azoles, a surfactant and an organic solvent, characterized in that it contains tebuconazole, or benomyl, or a mixture thereof, and, as a surfactant, a combination of a nonionic surfactant active substance and anionic surfactant from the group comprising abietic acid or calcium abietate or magnesium abietate or rosin or calcium resinate or magnesium resinate or nitrile abietic acid, or amide of abietic acid, or triethanolamine of abietic acid, or levopimaric acid in the following ratio of components, wt.%:
Active substance 1.0-6.0 Nonionic Surfactant 13.0-22.0 Anionic Surfactant 18.0-27.0 Organic solvent rest 2. The fungicidal composition according to claim 1, characterized in that an aromatic solvent is predominantly used. 3. The fungicidal composition according to claim 1, characterized in that it is presented in the form of an emulsifying concentrate.