SU342316A1 - PLANT GROWTH REGULATOR - Google Patents

Description

This invention relates to the use of 2-chloroethanethiophosphonic acid amide compounds for regulating plant growth. It is proposed to use amide compounds of 2-chloroethane phosphate of the general formula as a plant growth regulator. NH-R C1 - CH, - CH, - P / where X is oxygen or sulfur; R — C — Cb — lower alkyl or phenyl; RI is hydrogen, an ammonium equivalent or the equivalent of an alkali or alkaline earth metal, and also a phenyl residue substituted in some cases by a halogen atom, a nitro group, an alkyl or a hydroxyl group. The 2-chloroethane- (thio) phosphonic acid amide compounds are more active plant growth regulators than the 2-chloroethane phosphonic acid, Kotor acts in a similar way. Among the compounds of formula I that have biological activity, the following can be mentioned: MOHO-N - ethylamide 2 - chloroethane phosphonic acid, MOHo-Nn-propylamide 2 - chloroethane phosphonic acid, MOHo-N-isopropylamide 2-chloroethanephosphonic acid, MOHo-Nn- butylamide 2-hloretanfosfonoBOY acid mono-M - '- 0gor-butylamide 2-chloroethyl "fosfoiovoy acid, MOHO-N-Greta butylamide 2-hloretanfosfonovoy acid, iMOHO-N-isobutyramide 2 - hloretanfosfonovoy acid, MOHo-N-phenylamide 2 - Chloroethanephosphonic acid, MOHo-N-methylamide 2-chloroethanethiophosphonic acid, MOHO-N-ethylamide 2-chloroethantiophosphon ovic acid, MOHO-Nn-propylamide 2-chloroethane and phosphoric acid, mono-M-1Isopropylamide 2 - chloroethane and phosphoric acid, mono-M-n-butylamide, 2-chloroethantiophosphonic acid, mono-M-boro-butylamide, 2-chloroethantiophosphonic acid,

MOiHo-N-isobutylamide 2-chloroethane phosphonic acid,

MOHo-N-phenylamide 2-chloroethanethiophosphonic acid, as well as their sodium, potassium, ammonium, calcium, and barium salts, and 2-, 3-, and 4-hydroxyphenyl, nitrophenyl, cresyl, new, and chlorophenyl esters, 2,4- and 2,6-dichloroNO2 esters.

Known compounds, for example, 2,4-dichlorophenyl ester of 2-chloroethantiophosphonic acid mono-N-isopronylamide can be used to control plant growth.

The action of biologically active substances depends on the processing time, on the stage of seed or plant development, and on the concentration of the active substance.

Plant growth regulators are used to speed up or slow down seed germination, flowering, growth of shoots and roots, to slow down grass growth on lawns, streets and roads, which makes it less likely to cut grass.

Plant growth regulators can affect the intensity of lateral branching, which is of interest, for example, when plants are propagated by cuttings.

By changing the concentration, it is possible to influence the formation of lateral shoots and thus stimulate the development of the leaves.

When processed by a growth regulator at the time of normal flower formation, an increase in the number of buds is possible. In addition, biologically active substances can prevent the formation of leaves, which facilitates harvesting or shortens the period of time by which the plants must be / transplanted.

Treatment with compounds of the formula I affects the number of seeds in the fruit (do not contain at all or contain more than usual).

Under certain conditions, it is possible to cause premature fall of the fruit or speed up the fall of the fruit, to carry out processing in MO.M6NT of the harvesting of grain, which facilitates the harvesting.

After spraying with biologically active substances, the immature fruits ripen more quickly and better painted. . The form of use of biologically active substances is common, for example solutions, emulsions, suspensions, dusts, wettable powders, pastes and granules. Biologically active substances are mixed with solvents and / or carriers, emulsifiers and / or dispersants. As solvents can be

aromatic compounds (e.g., xylene, benzene), chlorinated aromatic hydrocarbons (e.g., chlorobenzene), paraffinic hydrocarbons (e.g., petroleum fractions), alcohols (e.g. methyl, butyl alcohol), highly polar solvents (e.g. dimethylformamide and dimethylsulfoxide) are used ) as well as water. Of the known carriers, finely divided kaolin, clay, talc, chalk, highly dispersed silicic acid and silicates can be used. The emulsifiers used may be of the anionic and non-ionic type, for example, polyoxyethylene fatty acid esters, polyoxyethylene ethers and fatty acids, for example, alkyl aryl lignoglycol ether, alkyl sulfonates and aryl sulfonates. Lignip, spent sulphite liquor and methylcellulose are used as dispersants.

In most cases, the compositions contain 0.1-95 weight. %, preferably 0.5 to 90 weight. % of biologically active substance. The method of application is conventional, for example, watering, spraying, dusting, dispersing, spraying.

The dosage of the compounds of the formula I is usually 0.0005-2%, preferably 0.01-0.5%. The consumption rate is 0.1-100 kg / ha, preferably 1-10 kg / ha.

The compounds of formula I are also active in the control of plant damaging bacteria.

Example 1. Slowing the growth of plants (flax seeds).

Move 1 weight. including biologically active substances with 40 weight. including acetone containing 0.25 weight. including the alkylaryl polyglycol ether emulsifier, and the resulting concentrate is diluted to the desired concentration with a buffer solution containing disodium phosphate and potassium dihydrogen phosphate (pH).

Petri dishes on two filter paper is placed on 25 seeds of flax. 10 ml of the prepared composition (dose 250 ppm) are pipetted into each cup and the seeds are germinated in the dark at 25 ° C.

After 3 days, the length of the shoots and roots and the slowdown in plant growth are determined. 100% means stunting, and 0% means Growth like untreated plants.

The results are shown in table 1. Table 1

Continued table. one

Example 2. Slowing plant growth and removing leaves (leguminous plants). Bean plants (Phaseolus vulgaris) 10 cm high are sprayed with a composition prepared in the same manner as in Example 1 and containing Example 3. Slowing the growth of plants (wheat). 5000 ppm of biologically active substance. After 6 days, the average length of plants and the number of leaves in three plants in each experiment are determined. The results are presented in Table. 2. Table 2 is as in Example 2, and after 10 days the average plant length is estimated. Example 5. Slowing plant growth (millet). Millet plants (Panicum miliaccum), 4 cm high, are sprayed with the compositions prepared in Table 3 as described in Example 1. After 6 days, the growth of the plants is assessed. The results are shown in Table. 5. Table 5

Example 6. Accelerated fruit ripening (tomato).

Green unripe tomatoes sprayed with a composition containing 5,000 ppm biology Biologically active substance

R

(known compound)

C1-CH, -CH, -P

C1-C1-lgSng-P Example 7. Slowing plant growth (flax seeds). 30 In two pieces of Petri, 25 seeds of flax are placed on two filter papers. Pipette 10 ml of the active compound as in Example 1 are pipetted into each thicket.

The results table. 6

Table

Acceleration ripening days

he

12 he

 / YN-S, N, -izo

14

II Well-UZO

14

no-biologically active substances, prepared as in Example 1. Germinate the seeds — three 25 ° C in the dark and after 3 days determine the length of the shoots and seeds. The results are shown in Table. 7. Table 7 and the subject of the invention. The use of amide compounds of 2-chloroethane and phosphoric acid of general formula X P NH-R CI - CHg - CHg - R R 12 where X is oxygen or sulfur; R — C — Cb — Lower alnyl or phenyl; Ri is hydrogen, an ammonium equivalent or the equivalent of an alkali or alkaline earth metal, and also substituted in some cases with a halogen atom, a nitro group, alkyl or hydroxyl group, a phenyl residue, s as a plant growth regulator.