KR840000203B1 - Compositions of the plant growth regulator - Google Patents

Abstract

Combinations contg. I (R1=H, C1-3 alkyl; R2=H, C1˜C4 alkyl; R3=C1˜C4 alkyl, cycloalkyl, ph, haloaryl, etc; X=O, S) and a plant-growth regulator are defoliants. Thus, in greenhouse experiments, a combination 50g 1-phenyl-3-(1,2,3-thiadiazol-5-yl)urea and 50g S,S,S-tri-n-butyl-trithiophosphate ester /ha defoliated cotton by 43.5%, whereas the components applied by themselves were 34.8% and 4.4% effective, respectively.

Description

Plant growth regulation composition

The present invention relates to a plant growth regulator, in particular a defoliant composition, containing a mixture of 1,2,3-thiadiazole-5-ylurea derivative of formula (I) with other plant growth regulators and / or defoliation agents .

In the above structural formula

R ₁ is hydrogen or alkyl having 1 to 3 carbon atoms

R ₂ is hydrogen or alkyl having 1 to 4 carbon atoms

R ₃ is alkyl having 1 to 4 carbons, cycloalkyl having 5 to 8 carbons, unsubstituted phenyl, phenyl substituted with one or more halogens, phenyl substituted with one or more methyls, phenyl substituted with one or more methoxy, or one or more nitros Is phenyl substituted by

X is an oxygen atom or a sulfur atom.

The present invention relates to a composition for plant growth regulators, in particular for defoliation of plants (eg cotton), which comprises mixing 1,2,3-thiadiazol-5-yl urea derivatives with other growth regulators and / or defoliation agents To prepare.

It is well known that 1,2,3-thiadiazol-5-yl-urea derivatives are used as plant growth regulators.

(See German Publication No. 2,234,816). However, these active ingredients alone are not sufficient in all cases.

In addition, other growth regulators and defoliators have not been found to fully meet practical needs.

It is therefore an object of the present invention to provide an agent for plant growth regulators which exhibits better efficacy than known growth regulators and defoliants.

In the present invention, 1-phenyl-3- (1,2,3-thiadiazol-5-yl) -urea is suitably used as the 1,2,3-thiadiazolyl urea derivative.

The formulation of the present invention may include the following growth regulators and / or defoliants as other active ingredients.

Auxin

α- (2-chlorophenoxy) -propionic acid, α-naphthylacetic acid, 4-chlorophenoxyacetic acid, β-naphthoxyacetic acid, 2,4-dichlorophenoxyacetic acid, naphthylacetamide, indolyl-3- Acetic acid, Nm-tolylphthalamic acid, indolyl-3-butyric acid, gibberellin, S, S, S-tri-n-butyl-trithiophosphoric acid ester, cytokinin, 2-chloroethylphosphonic acid, 2-chloro- 9-hydroxyfluorene-9-carboxylic acid, 2-chloroethyl-trimethylammonium chloride, N, N-dimethylaminosuccinate amide, 2-isopropyl-4-trimethylammonio-5-methylphenylpiperidine-1- Carboxylic acid ester chloride, phenyl-isopropylcarbamate, 3-chlorophenyl-isopropylcarbamate, ethyl-2- (3-chlorophenylcarbamoyloxy) -propionate, maleic acid hydrazide, 2,3-dichloroiso Butyric acid, di- (methoxythiocarbonyl) disulfide, 1,1'-dimethyl-4,4'-bipyridylium-dichloride, 3,6- Endotoxinhexahydrophthalic acid, 3-amino-1,2,4-triazole

1,2,3-thiadiazolyl-5-yl-urea derivative, 1- (2-pyridyl) -3- (1,2,3-thiadiazol-5-yl) -urea

2-butylthio-benzothiazole, 2- (2-methylpropylthio) -benzthiazole, 3,4-dichloroisothiazole-5-carboxylic acid, 2,3-dihydro-5,6-dimethyl-1 , 4-dithiin-1,1,4,4-tetraoxide, arsenoic acid, cacodylic acid, chlorate, in particular calcium chlorate, potassium chlorate, magnesium chlorate or sodium chlorate, calcium cyanamide, potassium iodide, magnesium chloride, absic acid And nonanol.

This formulation contains 1-phenyl-3- (1,2,3-thiadiazol-5-yl) -urea as 1,2,3-thiadiazol-5-yl-urea derivative and S as other active ingredient. , S, S-tri-n-butyl-trithiophosphoric acid ester, potassium or sodium chlorate, 1,1, -dimenyl-4,4'-bipyridinium chloride, 2-butylthio-benzthia Sol, 2- (2-methylpropylio) -benzthiazole, 3,4-dichloroisothiazole 5-carboxylic acid or 2,3-dihydro-5,6-dimethyl-1,4-dithiin-1, It is advantageous to contain 1,4,4-tetraoxide.

Surprisingly, the preparations according to the invention exhibit a much stronger plant growth regulation than the action of each of the active ingredients contained therein.

The formulations of the invention are particularly suitable for defoliation of cotton, which makes them ideal for picking berries by harvesting machines at the time of fruit harvesting.

The formulations of the invention can also cause other plants to affect growth or cause defoliation. That is, for example, it promotes the growth of side branches in the shoots located at the bottom of the grasses and promotes the formation of the dicotyledons, especially the leaves of green leaves, apples and other trees.

The present invention also provides a method of controlling or defoliating the growth of a growing plant by treating the plant with an agent of the present invention.

The present invention also provides a method of controlling or defoliating the growth of a growing crop by treating the crop with a formulation of the invention.

The rate of use which gives rise to the desired defoliation is usually from 1 to 10,000 g of active substance per hectare, in particular from 10 to 1000 g of active substance per hectare.

The formulations of the present invention may each be used in admixture with other active substances, such as defoliants, plant protection agents or pest control agents, depending on the desired purpose.

In addition, additives for increasing efficacy such as organic solvents, wetting agents and oils can be used to increase and promote the efficacy of the formulations of the present invention. Therefore, the use rate of each active ingredient is much reduced.

The formulations of the invention are in the form of preparations such as powders, sprays, medicaments, emulsions or suspensions, with the addition of one or more surfactants such as liquid and / or solid carriers or diluents, in some cases, wetting agents, tackifiers, emulsifiers and / or dispersants. Can be used to make.

Suitable liquid carriers include, for example, water, aliphatic and aromatic hydrocarbons such as benzene, toluene and xylene, cyclohexanone, isophorone, dimethylsulfoxide and dimethylformamide and light fractions.

Suitable solid carriers include, for example, tonsil, silica gel, talc, kaolin, atacclay, limestone, soil minerals such as silicon dioxide and plant products such as flour.

Surfactants include calcium lignin sulfonate, polyoxyethylene-alkylphenylether, naphthalenesulfonic acid and salts thereof, phenolsulfonic acid and salts thereof, formaldehyde condensates, fatty alcohol sulfates and substituted benzenesulfonic acids and salts thereof .

The proportion of total active ingredients in these various formulations can vary over a wide range. For example, the formulation contains about 10 to 80 weight percent of the active substance and about 90 to 20 weight percent of the liquid or solid carrier and optionally up to 20 weight percent of the surfactant.

The weight ratio of each active ingredient in the formulation is about 100: 1 to 1: 1000, preferably 10: 1 to 1: 100, depending on the degree of plant sensitivity and resistance, the time of use, climatic conditions and soil conditions. Is changed.

The formulations can be applied by conventional methods. For example, water is used as the carrier and sprayed at a rate of about 100 to 1000 liters / ha. In addition, this formulation can also be used by the "low volume method" and the "small volume method".

In addition to the above compounds, the following compounds may be used as the thiadiazole derivatives of formula (I).

The following examples illustrate the invention.

Example 1

In a greenhouse, a series of experiments are carried out by repeatedly treating the preparation four times with the expanded leaves of the 7-11 leaf stage cotton. The amounts of the mixed ingredients and the amounts of each active ingredient used in 500 liters of water per hectare are listed in the following table.

Check the number of leaves fallen after 14 days of treatment. These results indicate that there is defoliation activity when compared to the number of tree leaves that existed before the treatment.

Also s. egg. Colby's method ["Calculating Synergistic and antagonistic responses of herbicide combinations" Weeds, 15/1 (1967), pages 20 to 22] measures the value E, the additive behavior of each expected active ingredient.

Each calculation method is represented by the following formula.

here

Desalting percentage of X = A formulation (active ingredient p kg / ha)

Defoliation percentage of Y = B formulation (active ingredient q kg / ha)

Defoliation percentage of Z = C formulation (active ingredient r kg / ha)

Expectation of defoliation for E = A + B formulations (p + q kg / he) and A + B + C formulations (p + q + rkg / ha).

If the observed value is higher than the value E calculated by Colby's method, the material has a synergistic effect.

[table]

Example 2-Example 7

Cotton is treated according to the method of Example 1 above. The results are reported in the following table.

Example 8

Cotton is treated according to the method of Example 1 above. This example is performed under daylight conditions that are much poorer than Example 7 above. The results are described in the following table.

[table]

Example 9-31

The cotton is treated according to the method of Example 1, and the following results are frozen.

Example 30-33

Treatment of the compound with young green tree according to the method of Example 1 above yields the following results.

[table]

Example 30

Example 31

Example 32

Example 33

Claims (1)

The 1,2,3-thiadiazol-5-yl-urea derivative of the following general formula (I) is given in a ratio of 10: 1 to 1: 100, based on the total active ingredient, gibberellin, S, S, S-tri-n- Butyl-trithiophosphoric acid ester, 2-chloroethylphosphonic acid, 1,1'-dimethyl-4,4'-bipyridylium dichloride, 3,6-endoxohexahydroprotalate sodium salt, 3-amino -1,2,4-triazole, 1- (2-pyridyl) -3- (1,2,3-thiadiazol-5-yl) -urea, 2-butylthiobenzothiazole, 2- ( 2-methylpropylthio) -benzothiazole, 3,4-dichloroisothiazole 5-carboxylic acid, 2,3-dihydro-5,6-dimethyl-1,4-dithiin-1,1,4,4 A composition for controlling plant growth, characterized in that it is mixed with an active ingredient selected from tetraoxide, chlorate, potassium iodide, and magnesium chloride.

In the general formula, R ₁ is hydrogen or an alkyl group having 1 to 3 carbon atoms, R ₂ is hydrogen or an alkyl group having 1 to 4 carbon atoms, and R ₃ is an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, and an unsubstituted phenyl group. Or a phenyl group substituted with one or more halogens, a phenyl group substituted with one or more methyl groups, a phenyl group substituted with one or more methoxy groups, or a phenyl group substituted with one or more nitro groups, and X is an oxygen atom or a sulfur atom.