SU315385A1 - Seed disinfector and soil fungicide - Google Patents

Description

Isoooretation refers to the use of organic compounds at the same time as seed disinfectants and soil fungicides.

Known to use as a fungicide; ethyl mercichloride. This drug has a high activity and a wide range of action. However, the high toxicity of the indicated compound is warm-blooded. In addition, the use of tetramethylthiuram disulfide is also known as seed treatment, the disadvantage of which is weak bactericidal activity and insufficient activity against smut.

In order to find more active drugs, it is proposed to use compounds of the general formula as seed treaters for grain crops and soil fungicides.

, -OAg R-P

NHR

where R is alkyl, 11 is C-C carbalkoxyalkyl, Dg is chlorinated phenyl. These compounds may be

Dov substituted 0-arylalkylthiophosphonic acids with amines in the presence of bases or chlorides of anhydrides X-alkyl, oalkylthiophosphonic acids with phenols.

Two drugs are most active in the action on pathogens: 0-pen t ahlorfe NILE-N-butyl amide omethylethiophosphonate, called pentachlorophosphonate, and 0-2,4,5-tri-chlorophenyl-N -c (.- carbethoxyethyl-amidomethiophosphonate, named carbophos). The toxicity of these drugs, respectively, 1000 and 800 mg / m.

five

Example 1. The activity of drugs against the complex of seed pathogens was determined under laboratory conditions. Petri dishes on filter paper placed on moistened calcined quartz sand, laid out the seeds treated with the tested preparations. The mold count was determined on the fifth to seventh day. The results of tests showed that karbofosg phonate disinfects poultry seeds, buckwheat seeds, sunflower seeds from the complex of mold pathogens (Ntucas Fusarium Penicillium, etc.) and in this respect exceeds 30% hexachlorobutadiene and 50% tetramethylthiuram disulfide is equivalent and 50% tetramethylthiuram sulfide. The results of the experiments are given in table. 1 Example 2. The activity of the carbon phosphonate was tested against root rot pathogens. To do this, on a lawn (potato-agrose agar) in Petri dishes, seeded with the culture of the test object, were spreading seeds, treated with preparations. By the presence of negative zones (zones of no growth of the fungus), the carbophosphonate activity was judged. Based on the data obtained during the test, it was noted that carbophosphate is superior in activity to tetramethylthiouragchisulfide and is equivalent to granozan. Pentochlorophosphone was somewhat inferior to the standard in terms of the effect on pure cultures of mold pathogens and field rot. The table below shows the size of the negative zones around the seeds on the lawn, sown with clean cups of mushrooms, root rot pathogens and snow mold of grain crops. 2, Under field conditions, the action of carb phosphonate was tested for germination of wheat, oats, barley, buckwheat, and flax. , CL: 100 seeds of this were sown four times over four times in a field. The test results showed that 40% carbon phosphate had no negative effect on germination. The results are shown in Table 3, for example. Test preparations against snow mold on rye were carried out under vegetative conditions. To do this, the Fusarium nivale infection was introduced into the vessels with soil and mixed, it was mixed with soil, then rye seeds sown with preparations were sown with soil. The vessels with the soil and the seeds were kept in a thermostat with temperament and artificial light during the day. After 15–20 days, the kahs were counted on their infection with the snow mold Fusarium nivale. The test results showed that 10% carbophosphonate in activity for mold pathogens was equivalent to the mercuran preparation (see Table 4, Example 5. Seed treaters under field conditions in 1967-1968 were carried out at Sheremetyevo base near Moscow. Sowing and fertilizing was carried out according to generally accepted methods. In the fall, the soil was plowed to a depth of 25 cm, cultivated and harrowed in the spring. In the pre-sowing period, a mineral (R) dose of 60 kg / ha was applied to the active substance. - multiple Y. repetition with a size of 2.5 m. For the experiment, we used seed wheat varieties Moskovka. Sowing was carried out 10-12 m. Field germination was calculated in the period of 18-20 m. Determination of infection of the common smut wheat during the period of ripening was performed. The preparations presented in Table 5 showed that carbophosphonate, in terms of germination and activity against solid smut of wheat in field conditions and dusty smut of millet in laboratory conditions, is not less than 50% of tetramethylthiuram disulfide and is somewhat superior associated. EXAMPLE 6 Tests of carbophosphonate in the fight against Fusarium inducing gladioli caused by Fusarium oxysporum were carried out in a closed group. Gladiolus bulbs were soaked in 10% aqueous emulsion of carbophosphonate for 1 min and immediately planted in the ground. The test results showed that carbophosphonate causes a significant decrease. Fusarium gladiolus gives an increase in the number of flowering stems compared to the control. The results of the experiments are given in table.6. Example 7. Carbophosphonate tested as a soil fungicide when introduced into the soil under cotton in the fight against root rot. In the presowing application to the surface layer of soil, carbophosphonate inhibited the development of root rot and in this respect was not inferior to pentachlorobitrobenzene, which is widely used in the cultivation of cotton and other crops. The results of the tests are given in Table 7. The carbophosphonate was tested for activity for the fungal mycelium by introducing it into the melted and cooled to potato-dextrozagar followed by sowing of test objects on the frozen surface. Tests showed that carbophosphonate inhibited the growth of all 15 test objects and was not inferior in this respect to the figon, taken as the standard. These data have shown that carbophosphonate inhibits the development of mold pathogens (Asperpilus niger enicilluim) root rot (Rhisoctonis solan, Fusarium) and other pathogens of agricultural crops.

Table 1

40% Pentachlor 40% Carbophosphone

40% pentachlorophosphate

table 2

1 Table 3

91.0 72.3 58.0 80.5

77

78 93.0 88.0 60.0 84.0

30% hexachlorobutadiene

Control

93

Mercuran 10% Carbo 40% Carbophosphonate

40% pentachlorophosphate

Granozan

30% hexachlorobutadiene

50% tetramethylthiuram disulfide

Control (seeds not etched)

Continued table. 3

64

91,883,658,577,6 67

Table

114.4

Table 5

75

75

70

75

Signorita 80 Olga Chekhova 75

Signorita 60 Olga Chekhova 55

PentachloronitroThe main causative agent of root rot Fiisarium

Claims (1)

Claims of Use of Compounds of the General Formula - OAg R-p NHEtable 6 12 15 50 60 45 30 77 60 i is alkyl, R is lh, arb al coc coccal, - Chlorinated phenyl, as seed disinfectants for soil fungicides. is rhisoctonis solanj