SU631512A1 - Amine thiocyanates as defoliants of cotton plants - Google Patents

Description

This invention relates to new hydrogen-anhydrous salts of amines of the general formula -tRH SON- (I) CH M where T is hydrogen, methyl, ethyl or Fe. NILE; similar haystacks with 1-4 carbon atoms, which can be used in agriculture as cotton defoliants. Cotton defoliants are described in the literature, for example, S.S.S. -tributyl triphosphate (butyphos), magnesium chloride 2. However, the ammonium salts of rhoridic acid are more accessible than the defoliant and have higher activity than the compound. The aim of the invention is to expand the range of cotton defoliants that would have high defolating activity. The goal is achieved by new hydrogen chloride alloys of amines of formula (g). The compounds of general formula (I) are obtained by reacting the chlorohydrates of the corresponding amines with lead in alcohol. Example Hydrogen salt of triethylamine. To a solution of 13.8 g (0.1 mol) of triethylamine hydrochloride in 30 ml of alcohol was added a solution of 16.0 g (0.0.05 mol) of lead rhodium in 30 ml of alcohol at 20 ° C. At the end of the addition of rhodium lead, the temperature of the reaction mixture is gradually raised to 50-60 ° C and kept at this temperature for 2 hours. Then the precipitated lead chloride is filtered, the filtrate is evaporated and the triethylamine hydrogen sulfide is obtained, yield 1.5 g (59%), t .pl. 32 ° C. Compounds No. 1-5 are obtained analogously, the data of which are given in Table 1.

Table 1

1. Trimethylammonium 32-33 2. Triethylammonium 36-37 3. Diethylammonium 43-45 4I Dibutylakmoni 52-54 5. Dimethylphenyl 75-76 moni

Hydrogen boron salts of amines of general formula (I) exhibit a defolating activity on cotton and can be used in agriculture.

Particularly active was the compound rhodanide Triethylammonium (TIIIMSH - alpha).

The defolating properties of the substances are first revealed on individual plants, and then under conditions of a small-time night experience.

Before processing, the plants take into account the number of leaves on them, then the fallen and remaining ones (after 3,6,9,12 days). Each time, take into account the number of dead and the remaining dry plants (dried by 2/3 and completely), semi-dry, partially dried, and ee49, 2

Green

Semi-dry

Dry

Fallen

41.2

Green Semidry Dry Fallen

1.5

54.6

Green

Semi-dry

Dry

Fallen

flaxen (intact and slightly damaged) leaves. When processing plants using the three standards of the working solution - 600,650,750 g / l, depending on the power of the bush.

When testing drugs, a control variant is taken when the plants are treated with a solvent (water), which is used to prepare the working solution. Experiments were made at least threefold, regardless of their nature and scale. In the amount of the reference, magnesium chlorate is taken at a dose of 10 kg / ha.

Compounds are tested at concentrations of 0.5; one; 0; 1.5 and 2.0%. The results of the experiments in which the tested compounds No. 1-5 (see table 1) and 6 are taken at a concentration of 1.5% are listed in Table 2.

table 2

65.2

26.0

36.0

6.5 3.4

7.9 10.6 0.9 5/1

5.1

21.7

65.5

34.4 19.1

7.4

five

15.1

6.2

8.1 2.5

1.4 1.2

1,3

0.4 1.7

1.0

0.9

89.5

88.0

91.1 4.0

60.0

31,8

55.5

9.3

67G 3.6

1.3 2.4

4.1

3.6 7.0 4.3

4.3

37,8

57.6 30.3 6240.118.7223.42 Sd N. gb 40.66 8.4623.71 5951.829.4216.93 52.43 9.9817.35 6045.029.3120.89 45.45 9.0924.22 5557.8310.2314.37 57.44 10.6314.89 6359.577.4815.32 SoN ,, 60.00 7.1115.15

Green Semidry Dry Fallen

Green Semidry Dry Fallen

1.5

Green Semidry Dry Fallen Magnesium Chlorate As a result of experiments, it was found that the compound TIIIMHA-alpha is more effective and less rigid than magnesium chlorate. When processed, the plates of the plants turn pale and slightly dehydrated. Leaf fall begins on the third day after cotton processing. The bulk of the leaves fall between 3-6 days. On the ninth day after exposure to the cotton with defoliant TIIIMHA-alpha and magnesium chlorine, leaf fall is 89.1 and 82.0%, respectively. After treatment with TIIIMSH-alpha cotton on day 9, the opening of the bolls is increased by 25.2% of the control and 4.9% of magnesium chlorate. After cotton processing by the proposed defoliants, the yield of raw cotton also increases.

Extension 2

0.5

2.8

1.2

16.7

9.6

5.6 12.7 16.7 11.9

10.7 14.3 11.7 20.6

83.2 68.8 63.4 60.8

6.7

42.1

5.6

35.7

42.1

7,8

9.2 10.2 16.4

36.8

30.5 28.9 26.8

48.7 18.8 14.7

24.6

15.2

0.2

1.7

0.9

6.5

2.8

2.6 7.5

1.5

16.8

22,8

19.3 26 51.2

80.3

77.2

Claims (2)

74.0 The claims 1. The hydrogen-anhydrous salts of the amygeneral formula: H SCN (I T7, K 1. J hydrogen, methyl, ethyl or FER and T are the same, with 1-4 carbon atoms as the cotton defoliants. 2. Compound according to claim. 1, where CHL. Sources of information taken into account during the examination: 1. Melnikov, NN Chemistry pesticides, M., Himi, 1968, P.417. 2. In the same place 479.