DD233780A1 - FLOOR DISINFECTANT - Google Patents

Abstract

The invention relates to soil disinfectants, which are used in agriculture and forestry and horticulture. The task to develop agents for soil disinfection with improved efficacy and without phytotoxic side effect with low waiting period is achieved according to the invention by the fact that they contain, in addition to conventional excipients and carriers, active ingredient combinations of 2-ethyl-hex-2-en-1-al and sodium N-methyldithiocarbamate or 3,5-dimethyl-1,3,5-2H-tetrahydrothiadiazine-2-thione. Compared with the individual components, a synergistic increase in activity is achieved with the active compound combinations according to the invention during use. The funds can be applied in the field and particularly advantageous in greenhouses or potting.

Description

) a. 3 weeks after sowing, the number of crops counted, taking into account the iytopathogenic damage and the phytotoxicity of the funds according to a boniturskaia, where the score marks 9 healthy plants and the score 1 totally damaged plants. For each variant, the average credit score is determined.

) The efficiency of the funds in% is according to Krüger

X (middle variant) .- X (untreated control). _nn IG '(%) = - .100

9 - X (untreated control)

> calculated, where X is the average score. Table A

/ ersion mix Conc. average 10 18 days Efficiency (%) 10 18 days relationship (Mg / l Credit score X, Sow to Earth) Sow to 1.2 1.0 medium administration - - medium administration 4.3 3.4 40 30 3 1.3 1.2 3 1 3 jnbehandelte 1.3 1.2 1 3 (ontrol - - 1.0 3.5 ' 3.2 - 30 28 Earth muffled - - 7.4 2.8 ' 4.6 80 21 45 2-ethylhex-2-en-1-al - 200 1.1 1 ? -Ethylhex-2-en-1-al - 400 1.3 4 Metham sodium ¹¹ - 200 1.8 ' 1.0 1.2 10 0 3 Vletham sodium - 400 1.1 ' 1 > -Ethylhex-2-en-1-al + I -acetoxy-2-ethyl-I 1.3 1.1 1 1 iExa-1,3-diene 4: 1 200 1.6 8th 2-ethylhex-2-en-1-al + 3.1 2.0 24 13 I -acetoxy-2-ethyl-1- iExa-1,3-diene 4: 1 400 3.6 4.5 ' 5.7 33 42 59 ^: ormaldehyde + Vletham sodium 1: 1 200 4,1 " - - 39 - - ^: ormaldehyde + Vletham sodium 1: 1 400 3.6 ' - - 33 - - 2-ethylhex-2-en-1-al + Vletham sodium 9: 1 400 4.5 - - • 44 - - 2-ethylhex-2-en-1-al + Vietham sodium 4: 1 400 5.3 - - 54 - - 2-ethylhex-2-en-1-al + Vletham sodium 7: 3 200 5.1 4.8 - 51 46 - 2-ethylhex-2-en-1-al + Vletham sodium 7: 3 400 5.2 6.3 - 53 65 - 2-ethylhex-2-en-1-al + Metham sodium 3: 2 200 5.5 5.7 - 56 58 - 2-ethylhex-2-en-1-al-t- Vletham sodium 3: 2 400 - 5.6 - - 56 - 2-ethylhex-2-en-1-al + Metham sodium 1: 1 200 - 6.5 - - 68 - 2-ethylhex-2-en-1-al + Metham sodium 1: 1 400 - 5.6 - - 56 - 2-ethylhex-2-en-1-al + Vletham sodium 2: 3 400 - 5.4 5.0 - 55 50 2-ethylhex-2-en-1 al + Metham sodium 3: 7 200 - - 4.7 - - 46 2-ethylhex-2-en-1-al + Metham sodium 3: 7 400 - - 5.7 - - 59 2-ethylhex-2-en-1-al + Metham sodium 1: 4 400 - - 2-ethylhex-2-en-1-al + Metham sodium 1: 9 400 - -

¹ metham sodium = sodium N-methyldithiocarbamate

² phytotoxic damage

-3- ItA 3Ö

Example 2

The active ingredients or active compound combinations used are mixed with ethanol to give a 10% solution. Depending on the test variant, 6I were artificially treated with casserole pathogens Pythium sp. and treated Fusarium oxysporum infected garden soil. To inoculate the soil substrate, fungal mass cultures (MK) were applied to quartz sand-cornmeal mixture and added to the soil in a ratio of soil: MK1: 10. The preservation of the treated soil took place in closed containers. At intervals of 3.10 and 18 days after application, soil was removed, filled into pots (d = 10 cm), seeded with cucumbers of the variety "Eva" each with 10 seeds and applied in 5fold repetition per medium variant Average temperature of 2O ⁰ C placed in the greenhouse and kept normally moist Evaluation see Example 1

Table B

variant mix Conc. average 10 18 days Efficiency (%) 10 I 18 days i relationship (Mg / l BoniturwertX, Sow to : o Earth) Sow to 2.7 2.0 medium administration -   - medium administration 6.5 6.6 60 66 3 2.6 1.3 3 0 0 3 untreated 2.5 1.2 0 , o control - - 4.9 6.6 2.0 - 62 : 0 74 Earth muffled - - 7.4 4.7 ²¹ 4.8 61 32 40 2-ethylhex-2-en-1-al - 200 4.8 0 86 2-ethylhex-2-en-1-al - 400 4.9 0 Metham sodium - 200 4.2 2.4 1.6 0 0 - Metham sodium - 400 4.2 ²⁾ 0 2-ethylhex-2-en-1-al + - 1-acetoxy-2-ethylhexa 4.0 2.2 21 1,3-diene 4: 1 200 7.2 56 - 2-ethylhex-2-en-1-al + 8.1 5.2 86 i-acetoxy-2-ethylhexa- 1,3-diene 4: 1 400 4,8 ²⁾ 7.8 8.0 0 81 2-ethylhex-2-en-1-al + Metham sodium 1: 1 200 7.7 6.6 - 68 62 2-ethylhex-2-en-1-al + Metham sodium 1: 1 400 7.6 5.9 - 66 51 2-ethylhex-2-en-1-al + Metham sodium 3: 2 400 5.8 6.0 - 22 52 2-ethylhex-2-en-1-al + Metham sodium 4: 1 400 6.6 41 2-ethylhex-2-en-1-al + Metham sodium 7: 3 400 7.2 56

 abelleC

variant mix Conc. average 10 18 days Efficiency (%) 10 18 days relationship (Mg / l BoniturwertX, Sow to Earth) Sow to 1.2 1.4 medium administration - - medium administration 5.9 5.6 60 55 3 1.4 2.6 3 3 16 inbehandelte 1.4 5.6 3 55 controlle - - 1.0 5.9 4.2 - 60 36 irdegedämpft - - 5.6 5.8 6.6 58 59 68 ! -Ethylhex-2-ene-i-al - 200 1.1 0 ! -Ethylhex-2-ene-i-al - 400 1.0 0 ) azomet ³¹ _ 200 2.9 1.5 1.5 24 4 1 ) azomet ³¹ - 400 1.1 0 Ethylhex-2-en-i-al + Acetoxy-2-ethyl-hexa- 1.8 1.4 8th 0 , 3-dien 4: 1 200 2.12 14 Ethylhex-2-en-i-al + 4.2 6.7 38 70 Acetoxy-2-ethyl-hexa- , 3-dien 4: 1 400 2.2 4.9 6.2 3 47 63 ^: ormaldehyde + i / Ietham sodium 1: 1 200 4.0 - - 38 - - ^: ormaldehyde + i / Letham sodium 1: 1 400 2.8 - - 23 - Ethylhex-2-en-i-al + dazomet 9: 1 400 3.7 - - 34 - - Ethylhex-2-en-1-al + ) azomet 7: 3 200 3.1 - - 26 - - Ethylhex-2-en-i-al + dazomet 7: 3 400 4.9 - - 49 - - Ethylhex-2-en-i-al + dazomet 1: 1 200 3.9 - - 36 - - Ethylhex-2-en-i-al + dazomet 1: 1 400 3.8 6.4 7.2 35 67 76 Ethylhex-2-en-i-al + dazomet 3: 7 200 4.8 7.0 6.7 48 74 70 Ethylhex-2-en-i-al + dazomet 3: 7 400 4.1 39 Ethylhex-2-en-1-al + dazomet 1: 9 200 3.3 41

Dazomet = S

Example 3

The active compounds or active compound combinations used are mixed with quartz sand as a carrier in a ratio of 1:50 parts. The further experimental approach and the evaluation are carried out as in the example

Claims (3)

Invention claim: Soil disinfectant based on 2-ethyl-hex-2-en-1-al, characterized in that, in addition to customary auxiliaries and excipients, as additional active ingredient component, sodium N-methyldithiocarbamate or 3,5-dimethyl-1,3,5-2H-tetrahydrothiadiazine-2 -thion in a mixing ratio of 9: 1 to 1: 9 parts by weight. Field of application of the invention The invention relates to soil disinfectants that can be used in agriculture and forestry and horticulture. Characteristic of the known technical solutions It is known to use lower aliphatic and unsaturated aldehydes for soil disinfection. Further , alkyl-substituted alk-2-en-1-ales have been proposed in combination with their enol acylates for the control of phytophathogenic soil microorganisms. However, these agents are not always fully satisfactory at low concentration levels and have in many cases undesirable relatively high selectivity to soil-borne fungal pests. It is also known that the methylisothiocyanate-releasing soil disinfectants metham-sodium and dazomet be used in agricultural practice. A disadvantage of these agents, especially the considerable phytotoxicity, so that after the treatment a grace period of 3 to 4 weeks to plant or planting the soil is observed. Object of the invention The aim of the invention is to develop new soil disinfectants with improved performance properties. Explanation of the essence of the invention The object of the invention is to develop soil disinfectants which show no phytotoxic side effects and can thus be used with little waiting period before sowing or planting. This object is achieved in that the soil disinfectant based on 2-ethyl-hex-2-en-1-al in addition to conventional excipients and carriers as additional active ingredient sodium N-methyldithiocarbamatoder3,5-dimethyl-1,3,5- 2H-tetrahydrothiadiazine-2-thione in a mixing ratio of 9: 1 to 1: 9 parts by mass. Surprisingly, the active compound combinations according to the invention have a greatly increased activity in comparison to the individual components (synergism). In their application occurs in contrast to known soil disinfectants no phytotoxic side effect on crops, so that they can be used with virtually no waiting period before sowing or planting. In addition, a widening of the spectrum of action and an extension of the duration of action is achieved with the inventive compositions. The agents are eminently suitable for controlling microorganisms that can cause soil-borne diseases on crops, such as Fusarium, Pythium, Verticillium, Rhizoctonia and Thielaviopsis species. With the application of the agents according to the invention, no undesirable side effects are associated, such as changes in the soil condition, hardening, lumping or crumbling of the predetermined structure of the soil. Furthermore, there is no complete sterilization of the soil, which would be undesirable in many cases, but a substantial reduction of phytopathogenic soil microorganisms, without eliminating the normal and necessary soil microflora. It is particularly advantageous that after the soil treatment, the sowing or planting of the soil depending on the sensitivity of the corresponding crops already after 1 to 3 days can be made. With suitable dosage, an application of the funds in the growing plant stock is possible. The preparation of the corresponding active ingredients 2-ethylhex-2-en-1-al, sodium N-methyldithiocarbamate and 3,5-dimethyl-1,3,5-2H-tetrahydrothiadiazine-2-thione is known and described in the literature. The application of the agents according to the invention is usually in the form of solutions, emulsion concentrates, wettable powders, dusting powders, granules and pastes. For this purpose, they are mixed with the customary solid support materials or dissolved or dispersed in a liquid support material, optionally with the use of surface-active compounds. As solid carriers are natural minerals, such as kaolins, alumina and talc or synthetic minerals, such as finely divided silica and silicates, and natural or synthetic high molecular compounds in question. Suitable liquid carriers are customary organic solvents. Commercially available emulsifiers, such as anionic, cationic and nonionic surfactants, can be used as surface-active substances. The formulations generally contain between 0.1 and 95% by weight of active ingredient, preferably between 5 and 90%. The active compounds may be used alone in the form of their formulations or the forms of use prepared therefrom by further dilution. The application is carried out in a known manner, for example by pouring, spraying, spraying, controlling or dusts. To treat the soil, amounts of active ingredient of 1 g to 1 000 g per m ^{3 of} soil, preferably from 50 g to 600 g, required. The compositions according to the invention can be used in the field and particularly advantageously in greenhouses or seedlings. embodiments The following examples serve to illustrate the soil-disinfecting effect of the compositions according to the invention. example 1 The active ingredients or active compound combinations used are mixed with ethanol to give a 10% solution. For each test variant, 121 were artificially treated with casserole pathogens pythium sp. and treated Fusarium oxysporum infected garden soil. To inoculate the soil substrate, fungal mass cultures (MK) were applied to quartz sand-cornmeal mixture and added to the soil in the ratio earth: MK 1:10. The preservation of the treated soil took place in closed containers. At intervals of 3, 10 and 18 days after application, soil was removed, filled into pots (d = 10 cm) and seeded with about 10 seeds each of peas of the variety "Gloriosa." Each variety is created in tenfold repetition are placed in an average temperature of 20 ⁰ C in the greenhouse and kept normally moist.