SU655280A3 - Fungicide - Google Patents

Description

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This invention relates to chemical plant protection agents, specifically fungicidal agents based on 1,2,4-triazole derivatives.

Derivatives of 1-trityl-1, 2,4-triazole are known to have fungicidal properties 2. However, they are not sufficiently active at low dosage rates.

A fungicide is also known, the substance of which is 4-dichloro-E- (2-propenyloxy) -phenethyl-im dazole 1.

However, when it is used as seed treatment, this active ingredient has a negative effect on the growth of cultivated plants.

The aim of the invention is to find new fungicidal agents based on 1,2,4-triazole derivatives having high fungicidal activity.

This goal is achieved by using a fungicidal agent containing a 1,2,4-triazole derivative as a compound of the general formula

I I 1 ..1Г-СН-СН-Г i) -Ri

where R is propenyl-, butenyl-2-, propynylatta or benzyl, which is once or twice substituted by chlorine or trifOrmethyl;

R is hydrogen, methyl;

R - fluorine, chlorine, bromine, methyl;

n 1 or 2

or its salt in an amount of from 0.1 to 95 wt.%.

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The forms of application of the compounds are usual: solutions, emulsions, suspensions, powdered preparations, pastes and granules. The preparations are made by conventional methods - common in the manufacture of

on pesticide formulations.

Consumption rates of the drug from 0.01 to 3, preferably from 0.01 to 1 kg per ha.

The method of obtaining the proposed compounds is based on the interaction of 1-aryl-2- (triazolol-1 -) - alkanols with strong bases, such as hydride, amide or lower alkali metal alcohols, to produce alkali metal salts, which are

the consequence is subjected to interaction with X - R, where X-CE, Br, 1, and K-IMP f

N.Ti-CH-CH-4 V

Example 1. Action against powdery mildew of wheat. Leaves of Carlbo cultivars grown in pots of wheat seedlings are sprayed with 0.05 and 0.025% -65% spraying aqueous solutions containing 80% of the active principle and 20% ligninsulfonate in a dry substance before dropping. With this preparation, plants are treated with wheat powdery mildew spores (Erysiphe graminis var. 56552 trlticl). Then the test plants are placed in a greenhouse at 10-22 s and 6570% relative humidity of the air. After 10 days, the degree of development of the fungi of the powdery leaves is determined; the scores, after spraying with a solution of the active beginning of concentration,%

Example 2, Action against brown rust of wheat.

Leaves grown in pots of wheat seedlings of the Caribo variety are dusted with spores of brown rust (Puccinia recondita). Then the pots are placed in a chamber with high air humidity (90-95%) for 24 hours at 20-22 ° C. At this time, the spores are sprouting, and the germ tubes are inserted into the leaf tissue. Then infected plants are sprayed until dripping.

0.1, 0.05% and 0.025% AQUEOUS spraying solutions containing 80% active ingredient and 20% ligninsulfonate in dry matter. After treatment with the preparation, the experimental plants are kept in a greenhouse at

20-22 C and 65-70% relative humidity.

After 8 days, the degree of development of rust fungi is determined.

The results are presented in table. 3 (the rating scale is given in Table 2).

Table 80 sy. Compound A -, 4-dichlorob- (2-propenyloxy) is used as a known compound. - phenethyl-imidazole. The results are presented in table 2, table 2

Example 3. Striped patches of barley (Helminthosporiinn sativum)

Samples of 100 g strongly infected with the fungus Helminthosporium sativum on barley seeds of the Asse variety are thoroughly pickled for approximately 5 minutes in glass bottles, using 250 mg (concentration 0.25%) of the indicated active substances for each sample.

A (known)

Control (without treatment)

Example 4. Action against Peronospora in vines ..

Vines (in pots) of variety MU1ler-Ihurgau are sprayed with aqueous dispersions containing 80% of the active principle and 20% of sodium ligninsulfonate in a dry matter. 0.1% spraying solutions are used (% relative to the dry matter). After drying of the applied coating, the leaves are infected with a suspension of zoospores of Plasmoparu viticola. First plant

Continued table. 3

Then in the agar of 2% malt extract in the Petri dishes place the pickled grains, namely, on each plate 10 grains; For each test series, 10 petri dishes are generally used. The cups are kept at 8-10 ° C. After a week, the number of grains affected by the Helminthosporium fungus is calculated.

The results are shown in Table. four.

Table4

10 2

100

5 is placed for 16 hours in a saturated (wet) chamber at 20 ° C, and then for 8 days in greenhouse conditions at 20-30 ° C. After this, the plants are placed again in the wet chamber for 16 hours in order to accelerate and enhance the formation of sporangia carriers. The accumulation of sporangia on the underside of the leaves is then calculated. For comparison, untreated, infected control plants are used. The results of the experiment.

Damage to the leaves after treatment with a 0.1% solution of the current

ABOUT

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Claims (2)

4 Thus, the proposed compounds have high fungicidal activity. The invention jg Fungicidal agent containing 1,2,4-triazral derivatives as an active substance, as well as a solid or liquid carrier, which differs from the fact that, in order to enhance on fungicidal activity, it contains 1,2 as a derivative, 4-triazole is a compound of the general formula „„ g3 O where - propenyl-, butenyl-2-, pro 65528010 began to pinylostat or benzyl R, once or twice substituted by chlorine or trifluoromethyl, is hydrogen, methyl R is fluorine, chlorine, bromine, methyl; or 2, or its salt in an amount of from 0.1 to 95 wt.%. Sources of information taken into account during the examination 1. Published for the Federal Republic of Germany No. 2063857 Cl. 12 p. 9, 1971. 2. The patent of Belgium No. 738095, cl. From 07 D, 1969.