SU701517A3 - Fungicidic composition - Google Patents

Description

This invention relates to chemical plant protection products, namely, the use of a fungicidal composition based on thiophosphoric ester. A fungicide is known, the active principle of which is 0-2, 4 5 Trichlorophenyl-O-methi.p-isopropylphosphate 1. However, it is not effective against diseases that develop parami-ixcH in soil. Also known is the soil fungicide pentachloronitrobenzene, which has insufficient fungicidal activity 2. More technically closest to the proposed are biologically active compounds, the active substances of which are used syioT 0-2, 4,6-trichlorophenyl-O, O-dialkio thioPhosphates. However, they have antiparathyritic activity 3. With the aim of finding A new fungicidal composition- with a high fungicidal activity suggests using compounds of the general formula CI, 0 Cn, where R and Rj are each atom of chlorine or bromine; . methyl or ethyl group, as an active substance in the amount of from 0.1 to 90 wt.%. Thiophosphoric acid4 esters can be obtained by reacting 2, 4, 6-trisubstituted phenol with 0,0-dimethylthiophosphoryl chloride, preferably in the presence of a binder (its acid agent, or by reacting a salt of 2,4, 6-trisubstituted phenol with 0.0 -dimethylthiophosphoryl chloride, This reaction is conducted respectfully in an inert organic solvent at a temperature of from 70 to 100 ° C. chemical structures. and physical constants of the proposed compounds are presented in the table.

Compound-i

Compound-I Chemical Structure

- "4-0- / Vert,

SNO

C1

WA .. „,

SNZO

Table 1

Physical constant

T, pl.79-79,5 °

Mp 73-74 ° C

snzO ..,. AL

SNZO

C1:

SNSO.

Jo

// Л f у-СгНз

 / five

c, n,

The form of use of drugs is normal. In these forms, the active substances are contained in an amount of from 0.1 to 90% by weight, preferably from 5 to 60% by weight. Example 1. Fight against the cucumber vybrovanie (test in a pot). The cultivated land was evenly filled in a flower pot with a diameter of 9 cm. On the surface of the named land, 10 MP were filled and inoculated on a Gorgaszh pathogenic land, in which Risoctoni solani {Rhizoctonla solani) was cultivated. Then, each of the aqueous solutions of test digdakaliums in the form of emulsifiable concentrates was poured into 100

t, square 81-83 s

P1 1,5500

90

p 1.5620

20 h; j3 1,5672 amount of 15 ml per pot. At the end of 2 hours, each pot was planted, but 10 pieces of cucumber seeds of the Kara Aonagafushinari variety (Kog-q Achopada ustiinofi); And after 5 days, the disease of cucumber seedlings was studied to calculate the percentage of healthy seedlings. the number of healthy percent of patients on healthy seedlings, the number of seeds sown on untreated and non-cultivated, plot The results of the tests are presented in table 2.

Concentration of the active ingredient, parts per mil250 125 62.5

250 125 62.5

250 125 62.5

250 125 62.5 125 62.5

6125

SNSO / .250CiHjO

CHjO. H //

 .Р-0 - // Vci 250

();

-R-0

VG SNZ

(CHjOl.-P-O-fJV-KOz 250 CH, - ZSNz

.Table 2

The percentage of healthy seedlings,% Lyon

100 100 90

100 100 70

100 100 60

100 100 80

100

250

80

60

100

90

50

62.5

Uninoculated, unprocessed

Note: Known compounds 1.

 3 soil sales available

Example 2. Fighting the crumble of cucumbers (tested in iKax barrels) ..

The cultivated land was filled up with plastic, the barrels were sized 0.1 m, L.x. the surface of the named earth was evenly covered and the pathogenic soil was icoculified,

which was cultivated by PJJBOK toni of solani (Bh-izootonia sobani) and the pathogenic earth was sufficiently mixed with the cultivated earth to a depth of 3 to 5 cm from the surface. Then each of the water

Connection1 2 3 4 5 6

ABOUT

II

I-C1: P - O

I

(CgN50) g R-ZSNz

Continuation of table 2

100 fungicide (the same designations are used below).

solutions, test chlorides in the form of emulsifiable concentrates were poured into this treated soil at the rate of 300 ml per barrel.

After 2 hours, 30 pieces of Kara variety Aonagafushinari (Kag Ql Aondo aiustiinaH) were planted in each barrel and after a month, the disease state of the cucumber seedlings was examined for calculation. % of healthy sleepers. This percentage was calculated in Example 1.

The test results are presented in the table. D. - ..,

T & B l and c a 3

The percentage of healthy sunbeds

3

98 98 97 97 97 95

200

200

About II P

CL

CH-O- /

ABOUT

C1

C1

C1 - y - N0,

C1 - Inoculated Mushroom, Untreated

raw, untreated

Example 3. Fighting dry rot of Japanese radish with dry rot: (tested in barrels).

Cultivated land was poured into plastic kegs 0.1 m in size. Then, the pathogenic land in which Fusarium oxiforum F. rafani (Fusar-iuni ox sporum f. I-apViani) was cultivated was smashed and inoculated with cultivated land 5 cm from the surface, 30 seeds of this type were planted in the ground thus treated. n per pot of donskoy radishes

Continued .S -,

200

200

Vr-Tn.

200

36

98

Vise varieties - 40 nichi (jyase-4o nictii) and seeds were covered with earth. After 3 hours, each of the aqueous solutions of test chemicals was poured into the ground in an amount of 300 ml per barrel. After the radish had ripened for one month in a greenhouse with an adjustable air supply at 26–28 ° C, the condition of radish patients was examined to calculate the percentage of healthy seedlings. The percentage was calculated according to example 1.

The results of the tests. presented in table 4.

Table 4

Continuation of table 4