CS254669B1 - Seedling of cultural plants - Google Patents

Abstract

The solution relates to the use of 3,4-dichloro-5-(1-chloromethylethoxy)-2(5H)-furanone of the formula for seed dressing of cultivated plants. The solution can be used in the agrochemical industry.

Description

The invention relates to the use of 3,4-dichloro-5-(1-chloromethylethoxy)-(5H)-furanone as a seed preservative for cultivated plants.

Numerous groups of organic compounds suitable as seed dressings for cultivated plants are known from the literature. Among the rhodane compounds, there are chloromethylrhodanide, 2-chloroethylrhodanide, dichloromethylrhodanide, trichloromethylrhodanide, bis-(rhodanidemethyl)sulfide, bis-(rhodanidemethyl)sulfoxide, bis-(rhodanidemethyl)sulfone, methylenerhodanide, bis(rhodanidemethyl)ether, (GB Pat. No. 844 816, DAS 1 188 858, GB Pat. 1 043 968, DAS 1 204 142, US Pat. 3 361 621), also known are pentachlorobenzylrhodanide (JP Patent 00936, ref. CA 69, 96210s. 1968 j, 3-nitro-4-ethylbenzylrhodanide (DD Pat. 56 779), dinitrophenylthiomethylrhodanide (JP Pat. 17 739/68, ref. Jap. Rep. No. 30, 1968J, Rhodanomethyldithiocarbamates (CS Pat. 142 097 J, N,N-dimethyl-S-ethylsulfenyldithiocarbamate (CS Pat. No. 118 818), N,N,-dimethyl-S-acetoxymethyldithiocarbamate (CS Pat. 140 067), bis-(trichloromethyl)trisulfide (Chemical Industry 10,55, 116 to 122 /1960/), bis-(tetrachloroethyl)disulfide (CS Pat. 118 605). Furthermore, 5-nitro-2-furfuryl nitrate (CS AO 163 535), 2-rhodanomethyl-5-nitrofuran (CS AO 162 199) are known as seed dressings for cultivated plants. As fungicidal agents, 3,4-dichloro-5-(3-iodopropynoxy)-2(5H)-furanone (CS AO No. 170 448 and CS Pat. 148 592).

It has now been found that 3,4-dichloro-5-(1-chloromethylethoxy)-2(5H)-furanone of the formula

can be used for seed treatment of cultivated plants.

Seed dressing of cultivated plants is carried out by appropriate application using fillers capable of binding 3,4-dichloro-5-(1-chloromethylethoxy)-2(5H)-furanone, or by application using diluents that do not react with the substance and are non-phytotoxic at the application dose of the dressing.

The term solid fillers refers to substances such as silica in various application forms, activated carbon, adsorbent carbon, activated clays, adsorption lines, kaolin, bentonite, talc, burnt magnesia, diatomaceous earth, tricalcium phosphate, powdered cork, pores and others, as well as mixtures thereof. The term diluents refers to ketones such as propanone, butanone, alcohols such as methanol, ethanol and others, some hydrocarbons, as well as other solvents or mixtures thereof.

Dry mordants are obtained by applying 3,4-dichloro-3-(1-chloromethylethoxy)-2(5H)-furanone to a solid support, either alone, for example by mixing in a fluid mixer, or together with other substances, for example with surfactants, adhesives, dyes with similar additives, or mixtures thereof. Liquid mordants are obtained by mixing 3,4-dichloro-5-(1-chloromethylethoxy)-2(5H)-furanone with a diluent or diluents, or by dispersing, optionally with the addition of surfactants, adhesives, dyes and similar additives, or mixtures thereof.

Finally, it is possible to combine the above principles, which allows obtaining seed dressings for cultivated plants for wet, semi-dry and dry dressing.

A distinctive feature of 3,4-dichloro-5-(1-chloromethylethoxy)-2(5H)-furanone is that it can be applied without loss of effectiveness with a wide range of pesticides, especially fungicides, which can achieve an expansion of the spectrum of effectiveness and an increase in the economy of seed treatment of cultivated plants.

The following examples illustrate, but do not limit, the subject matter of the invention.

Example 1

Determination of effectiveness on dead faces of the caliber.

Sterile grains of calibre (1000 g) were infected with an aqueous suspension of the micromycete Fusari• um nivale (250 ml) prepared from mycelium and conidia of a 21-day culture (250,000 conidia. ml ^-1 } and dried at laboratory temperature to fresh weight. The infected grains were measured on an electric shaker with the tested compounds at a dose of 2.1, 0.5, 0.25, kg of active substance. t ^_1 of seed. After 48 hours, the stained grains were planted on agar nutrient medium in Petri dishes (4 x 25 grains). After 48 and 72 hours of incubation at a temperature of 22 °C, the percentage of healthy, fungus-free grains was evaluated. The efficacy of the compound podfa was determined after application by staining on grains of calibre at a dose of 2, 1, 0.5 and 0.25 kg. t ^_1 against Fusarium nivale is evident from table 1.

Table 1

Efficacy on Fusarium nivale after pickling application

Compound dose eff. 1. Biological efficacy (%) kg . t ¹ 48 hrs. 72 hrs.

compound according to the invention 2 1 0.5 0.25 95 63 22 11 80 22 13 1 Fundazol M 2 98 87 Standard 1 97 83 0.5 49 40 0.25 11 6 control —. 0 0

Example 2

Effect on germination and emergence

The seeds of winter wheat Mironovska were treated on an electric shaker with development compounds at a dose of 2 and 1 kg of active substance . . i ^-1 of seed and with commercial preparations at a dose of 2 kg of the final preparation per ton of seed. After 48 hours, the treated grains were planted:

a) into Petri dishes on moistened filter paper (4 x 25 grains). After 72 hours, the number of germinated grains was evaluated (Table 2).

b] into sandy loam soil into wooden boxes (50 x 30 x 5 cm) 4 x 25 grains per row, were allowed to germinate and grow in a greenhouse. After 4 days, the influence of the compounds after application by dipping on seed germination was evaluated. On the 14th day, the plants were cut just above the soil surface, and the fresh biomass and dry matter were weighed after 24-hour exposure to a temperature of 80 °C.

(Table 3.)

Table 2

Effect on winter wheat germination

Compound dose acc. 1. kg. t" ¹ seed Sprouted grains (%) A B control — 94 100 compound according to the invention 2 95 100,,1 Fundazol M ^and 2 95 100.1 Quinolate 15 ^and F 2 93 98.9

and the dose of the final preparation

A absolute B relative Effect on emergence Compound Table 3 and biomass production 0 weight (gl Dose kg.F ¹ seed Seed germinated (%) fresh dry land A B A B A B control 90 100 0.143 100 0.0125 100 compound according to 2 93 100.3 0.151 105.59 0.0130 104 invention 1 92 102.2 0.145 101.39 0.0120 96 Fundazol M 2 93 103.3 0.148 103.49 0.0120 96 Quinolate 15 F 2 91 101.1 0.143 100 0.0120 96 development compounds — dose active ingredient A absolutely commercially prepared — addition of the final addition- B relative edit

The compounds according to the invention do not affect the germination of winter wheat grains, the effect on emergence was favorable, the wheat growth during the duration of the experiment was balanced without any signs of damage.

Example 3

Biological efficacy against Usiilago avenae on oats.

Oat seeds of the "Flamingsnova" variety were infected with a suspension of chlamydospores of powdery mildew of oat (1,000 g of seeds + 2,000 ml of nutrient solution + 15 grams of chlamydospores of U. avanae) under intermittent vacuum at laboratory temperature. Infected oats, dried to their original weight, were weighed 100 g each into Erlenmeyer flasks and stained on an electric shaker with developing compounds in a dose corresponding to 2, 1.5, 1, 0.75 kg of active substance per ¹ seed. Commercial stains were added in a dose recommended for agricultural practice. After 168 hours, the stained seeds were weighed 10 g each into test tubes and sown in the field; in 3 m long and 20 cm apart rows (each variant in 4 repetitions) at the Rača and Tekovské localities. Lužany. After emergence and during the vegetation period, the growth was monitored for possible phytotoxicity. The overall evaluation of effectiveness was made after sweeping the panicles, by subtracting healthy and infected panicles in each row (Table 4 and 5).

Table 4

Efficacy against Ustilago avenae on oats — Rača site

Compound Dose fin. Dose acc. 1. or. (kg. t ^-1 ] (kg.t ^-1 ] Infected ears (%) Biological Efficiency (%) Quinolate 15 F 3 0.54 0 100 Fundazol M 1.25 0.625 0 100 Baytan Univ. 2 0.39 0 100 compound according to the invention 2 0.85 98.20 1.5 2.12 95.53 1 1.61 96.60 0.75 0.81 98.29 control — — 47.43 0 Table 5 Efficacy against Ustilago avenae on oats — location Tekovské Lužany Compound Dose Dose Infected Biological financial or account 1. ears efficiency (kg t ^-1 ) (kg. t- ¹ ) (%) (%) Quinolate 15 F 3 0.54 0 100 Fundazol M 1.25 0.625 0 100 Baytan Univ. 2 0.39 0 100 compound according to the invention 2 0 100 1.5 0.14 98.43 1 0.32 96.54 0.75 0.59 93.62 control — — 15.66 0

Example 4

Biological efficacy against Drechslera graminea on spring barley.

The seed of spring barley "Frisia", highly susceptible to the fungus Drechslera graminea, was treated and sown in the field as in Section 2.1. The overall efficacy assessment was made in the development phase from 10.1. to 10.5. Feekesa, after counting healthy and infected plants in each row. (Table 6.)

Table 6

Effectiveness against Drechslera graminea on spring barley — Tekovské locality Compound Dose fin. or (kg. t" ¹ ) Dose of active substance (kg t“ ¹ ) Infected ears (%) Rovral TS 2 1.05 0 Panoctine Plus 2 0.64 0 Quinolate V4XS 2 1.30 1.14 Baytan Univ. 2 0.39 0.89 Agronomic 2 0.036 0.20 compound according to the invention 2 0.26 1.5 0.37 1 0.18 0.75 0.96 control — — 4.46

SUBJECT

Claims (2)

254669 10 9 Table 6 Efficacy against Drechslera graminea on spring barley - Tekov Compound Dávkafin. eventually. (kg. r1) Batch. substances (kg t-1) Infected ears (%) Rovral TS 2 1.05 0 Panoctine Plus 2 0.64 0 Quinolate V4XS 2 1.30 1.14 Baytan univ. 2 0.39 0.89 Agronal 2 0.036 0.20 Compound of the Invention 2 0.26 1.5 0.37 1 0.18 0.75 0.96 Control - - 4.46 OBJECT OF THE INVENTION Lužany Biological Activity (%) 100 100 74.43 80.04 95.51 94.17 91.70 95.96 78.47 0 Use of 3,4-dichloro-5- (1-chloromethylethoxy) -2 (5H) -furanone of formula 1 C | CH, Cl · CH-O-CH, Cl · O as seedlings of crop plants.