CS276154B6 - Agent for plant growth regulation - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant development regulating composition comprising as active ingredient a mixture of active ingredients.

It is known to use triazoles or phosphonic acid derivatives, for example 2-chloroethylphosphonic acid and its salts (cf. DE-AS 16 67 960), which have the ability to regulate biological processes, to control plant development. It is further known to use mixtures or salts of N, N, N-trimethyl-N-2-chloroethylammonium compounds or N, M-dimethylpiperidinium compounds and 2-chloroethanephosphonic acid to control plant development (cf. DE-OS 23 61 410, OE-OS 24 22 007 and DE-PS 27 55 940).

It has now been found that the mixture consists

a) a compound which is an effective plant growth regulator consisting of a triazole derivative of the general formula Id

in which

Λ represents a phenyl group substituted with a halogen atom and

b). % of 2-chloroethylphosphonic acid is particularly well suited for regulating plant development, since it exhibits a synergistic effect.

In the general formula (Id), A represents a halogen substituted phenyl group. Possible substituents are fluorine, chlorine, bromine or iodine atoms. The phenyl group may contain one or more, preferably 1 to 3, identical or different substituents. A is preferably 2,4-dichlorophenyl.

It is an object of the present invention to provide a plant development control composition comprising a synergistic mixture consisting of

a) a compound as a plant growth regulator consisting of a triazole derivative of the general formula Id

in which

A represents a phenyl group substituted with a halogen atom and

b) from 2-chloroethylphosphonic acid, wherein the weight ratio of component a), i.e. the triazole derivative of the general formula Id, to component b), i.e. 2-chloroethylphosphonic acid, is 30: 1 to 1:30.

Preferably, the weight ratio of component a), i.e. the triazole derivative of general formula Id to

1) 6 of component b), i.e. 2-chloroethylphosphonic acid, is 10: 1 to 1: 25.

The preparation of the triazole derivatives of the general formula Id known per se is described in European Patent Applications Publication Nos. 44,407, 40,350, 43,923 and 56,037.

In particular, mixtures consisting of one or more triazoles, such as 1- (2,4-dichlorophenyl) -1-methyl-2-methoxy-2- (1H-1,2,4-triazole-1), have a good plant development control effect. -yl) ethanol and 2-chloroethylphosphonic acid.

Plant development regulation means, for example:

inhibition of cell volume expansion, for example, straw, stem, branch, strain;

thickening the stalk wall and thereby improving the stalk strength (lodging resistance) as a prerequisite for securing yields in cereals, other grasses, oilseeds, legumes, fiber plants or tree cultures to facilitate work and increase crop density;

- improving the cultivation of young plants in a more compact form of growth;

- more compact growth in ornamental plants to ensure the production of better quality plants

- improving resistance to excessive cold, heat, water scarcity and salt tolerance;

- stimulation of better plantation, such as an increase in the number of fruit planted for pips, stone fruits and berries, cotton, soya, grapevine, citrus, almond, olive palm, cacao and coffee;

- deliberate gender differentiation in order to increase yield, for example in pumpkin plants and papaya;

stimulating the desirable senescence and / or the formation of a divergent mesh for the purpose of ahscise, for example to reduce the force required to tear off the fetus to facilitate mechanical harvesting of citrus, stone fruit, pome and soft fruit, olive palms, almonds, coffee trees and stone stones; .

- defoliation of nursery trees and ornamental trees for mail order in autumn;

defoliation of trees to disrupt the chain of parasitic infections, such as Gloeosporium heveae in the rubber tree (Hevea brasiliensis);

- stimulation of the ripening process, such as tomatoes, citrus fruits, pineapples, other fruits and coffee for programmable harvesting and better coloring of the fruit, or cotton for harvesting, which could be concentrated for up to 2 combing periods as well as interruption feed source chains for harmful insects;

- increased yields due to more favorable development conditions (for example, a more optimal microclimate in plant growth and / or water and / or nutrient use).

The novel mixtures or the application of the different active substances show, respectively. in particular in cereals, oilseeds and legumes shows a synergistic effect, i.e. the effect of the mixture or the application of the active substances in succession is better than can be calculated from the effects of the individual active substances. In addition, these compositions show better plant compatibility than known active ingredients.

The administration can be carried out by applying either the mixture or the respective individual active ingredients of the combination successively. Plant treatment can be carried out, for example, by seed dressing, post-emergence soil treatment, or by treatment of seedlings. seedlings or plant parts at each stage of plant development from the resting phase of the seed to the maturation and senescence phases.

The compositions according to the invention are used, for example, in the form of directly sprayable solutions, powders, suspensions, as well as highly concentrated aqueous, oily or other suspensions or dispersions, emulsions, oil dispersions, pastes, dusts, scatters or granules by spraying, fogging, dusting, coating , sprinkling, watering or injecting. The use forms depend on the purposes of use; in any case, they should ensure the finest possible distribution of the active agent according to the invention.

CS 276 154 H

For the production of directly sprayable solutions, emulsions, pastes and oil dispersions, suitable are the medium to high boiling mineral oil fractions, such as kerosene or diesel oil, tar oils, etc., and oils of vegetable or animal origin, such as e.g. benzene, toluene, paraffinic hydrocarbons, tetrahydronaphthalene, alkylated naphthalenes or derivatives thereof, for example methanol, ethanol, propanol, butanol, chloroform, carbon tetrachloride, cyclohexanol, cyclohexanone, chlorobenzene, isophorone etc., strongly polar solvents such as diraethylformamide, dimethylsulfoxide, M- methylpyrrolidone, water, etc.

Aqueous use forms can be prepared from emulsion concentrates, pastes or wettable powders or oil dispersions by the addition of water. In order to manufacture emulsions, pastes or oil dispersions, the substances as such or dissolved in an oil or solvent may be homogenized by means of wetting agents, adhesives, dispersants or emulsifiers in water. However, concentrates consisting of the active ingredient as well as wetting agents, adhesives, dispersing or emulsifying agents or solvents or oils which are suitable for dilution with water can also be prepared.

Suitable surfactants are the alkali metal, alkaline earth metal or corresponding ammonium salts of ligninsulfonic acid, naphthalenesulfonic acid and phenolsulfonic acids, or the corresponding ammonium salts of alkylarylsulfonates, alkylsulfates, alkylsulfonates, alkali metal and alkaline earth metal dibutylnaphthalenesulfonic acid salts, lauryl ether sulfates. fatty alcohols, alkali metal and alkaline earth metal fatty acid salts, sulfated hexadecanols, heptadecanols, octadecanols, sulfated fatty alcohol glycol ether salts, condensation products of sulfonated naphthalene and derivatives of naphthalene and formaldehyde, condensation products of naphthalene or naphthalenesulfonic acid with phenol and phenol and phenol , ethoxylated isooctylphenol, octylphenol, nonylphenol, alkylphenol polyglycol ethers, tributylphenyl polyglycol ether, alkylaryl polyether alcohols, isotridecyl alcohol, condensate starting products of ethylene oxide and fatty alcohol, ethoxylated castor oil, polyoxyethylene alkyl ethers, ethoxylated polypropylene, lauryl alcohol polyglycol ether acetal, sorbitol esters, lignin, sulfite waste liquors, and methylcellulose.

Compositions in the form of powders, dusts and dusts can be prepared by mixing or grinding the active compounds with a solid carrier.

Granules, for example coated granules, impregnated granules and homogeneous granules, can be prepared by binding the active ingredients to a solid carrier. Solid carriers are, for example, mineral clays such as silica gel, silicas, silica, silicates, talc, kaolin, attaclay, limestone, lime, chalk, bolus, loess, clay, dolomite, diatomite, calcium sulfate and magnesium sulfate, magnesium oxide, ground plastics, fertilizers such as ammonium sulphate, ammonium phosphate, ammonium nitrate, ureas and plant products such as cereal flour, tree bark flour, wood and nut shell flour, powdered cellulose and other solid carriers.

The compositions contain between 0.1 and 95% by weight of active ingredient, preferably between 0.5 and 90% by weight of active ingredient.

Oils of various types, fungicides, nematocides, insecticides, bactericides, trace elements, fertilizers, wetting agents, antifoams to prevent side effects may also be added to said compositions.

The improved biological effect of the mixtures or the application of different active substances in succession compared to the individual active substances, for example in various grasses, legumes and oilseeds, can be demonstrably illustrated in a field trial.

The triazole derivatives further used have proved to be particularly suitable. For simplicity, the substances used are indicated in the tables containing the results of the experiment as follows:

EN 276 154 3

N- (2,4-dichlorophenyl) -1-methyl-2-methoxy-2- (1H-1,2,4-triazol-1-yl) ethanol (= Example 11 of EP-A 56 007),

G = 2-chloroethylphosphonic acid.

? * 2

The experiments were carried out on plots of 12.5 m (cereals) or 25 m (peas and rape) and each experiment was repeated four times. The cultivation, fertilization and use of plant protection products against weeds, fungal infestations and harmful insects are carried out in the usual manner appropriate to the site.

Mixtures of bioregulators are applied either by wet pickling or by treating the leaf of plants. Spray treatment of the leaf is carried out by applying a spray suspension under a pressure of 0.35 MPa in an amount of water corresponding to 400 liters of water per hectare.

The reported seed yield results are converted to a constant moisture content so that the dry matter content is converted to 86%.

The synergistic effect can be ascertained by the Colby formula (S. R. Colby, Calculating Synergistic and Antagonistic Responses of Herbicide Combinations; Woed 15, 211-22 (1967)).

100 in which

X is the measurable effect caused by active substance A at the amount consumed, and

Y means the measurable effect caused by the active substance G at a consumed amount of b a

E represents the expected measurable effect of the mixture of active substance A at the amount consumed and and active substance G at the amount consumed b.

The difference between the expected E value of Colby and the measured value indicates whether a synergistic effect (potentiation or potentiation) or an antagonist effect (potentiation or potentiation) occurs, or if both effects coincide, so that only an additive effect occurs.

Examples 1 to 3

If Compound A is mixed with Compound G and then the resulting mixture is applied, a synergistic effect can be observed. This is apparent in experiments on winter barley. The treatment was carried out from the stage when the last leaf ligule is already visible until the ears start to climb. The use of the mixture resulted in the following results compared to the application of the individual substances:

- 3¾ growth inhibition;

+ 5¾ increase of yield and grain weight increase by + 7 4 (for 1000 grain + 2.7 g) as a sign of grain quality.

Example 1

Culture: Tapir winter barley

Oruhp soil: sandy clay soil

Sowing time: 25 09 34

Evaluation: 31 05 05

EN 276 154 36 formulation g active substance per l ha treatment height of difference (difference) date cm ° -s

neošstreno 0 - 130.2 100 ALIGN! AND 750 17 05 / 35 129.0 (-1.2) 99 (-Ό G 430 17 05 / 05 / 115.9 (-14.3) 09 / (-11) A + G 750 + 1300 17 05 / 35 110.4 (-19.3) 85 (-15)

Calculation of the synergistic effect:

X = 1.2 cm and Y = 14.3 cm,

143

E = 1.2 + 14.3--1x .beta.1 -LL12- = 15.13 _cin

100 ALIGN!

Against the expected change in growth inhibition of 15.3 cm, a change in growth inhibition of 13.8 cm was found.

Example 2

Culture: Lapir winter barley

Type of soil: clayey soil

Sowing time: 28 09 34 · ·

Evaluation: 15 07 05 agent g active substance per 1 ha treatment grain yield (difference) date dt / ha ´ »

untreated 0 - 62.1 100 ALIGN! AND 750 07 / 05 / 85 66.7 (+4.6) 107 (+ 7) G 480 07 / 05 / 35 61.1 (-1.0) 93 (-2) A + G 750 + 480 07 / 05 / 35 63.6 (+6.5) 110 (+ 10)

Calculation of the synergistic effect:

X = 4,6 dt / ha and Y = - 1,0 dt / ha,

E = 4.6 - 1.0 + ¹ · ⁶ --- ¹ · ¹ - ⁰ · = 3.64 dt / ha -100.

Against the expected change in grain yield: 3.64 dt / ha, a change in grain yield of

6.5 dt / ha.

Example 3

Culture: Tapir winter barley

Type of soil: sandy clay soil

Sowing time: 25 09 34

Evaluation: 21 08 85

EN 276 154 36

means • g of active substance per ha treatment date mass 1000 grains g (difference)

untreated 0 - 41.6 100 ALIGN! AND 750 17 05 / 35 42.6 (+1.0) 102 (+2) G 430 17 05 / 35 41.5 (-0.1) 100 ALIGN! (+/- 0) A + G 750 + 430 L7 05 / 35 45.2 (+3.6) 109 (+ 9)

Calculation of the synergistic effect:

X = 1.0 g and Y = -0.1 g

E = 1.0 - 0.1 + ..λι-Ρ ..-—— = 0.991 g 100

Against an expected weight change of 1000 grains of 0.991 g, a weight change of 1000 grains of 3.5 g was found.

Example 4

Similarly, a mixture of A + G compounds when applied by pickling spring wheat seed and winter rye results in synergistic effects. Thus, an improvement in the resistance of the straw against lodging by 45 ° was found.

Culture: spring wheat of Kolibri species

Type of soil: clay soil

Sowing time: 16 03 84

Evaluation: 26 06 84 composition g of active substance per 1 b and treatment of lodging (difference) date ‘-i

untreated 0 - 50 AND 2.5 15 Dec 03 / 34 73 (+23) G 2.5 15 Dec 03 / 34 13 (-37) A + G 2.5 + 2.5 15 Dec 03 / 34 5 (-45)

Calculation of the synergistic effect:

X = 28% and Y = -37

E = 23-37 + - = 1.36%

100 ALIGN!

Against the expected change in lodging by 1.36% (increment), a change in lodging by -45% (decrease) was found.

Claims (2)

PA-TENT REQUIREMENTS A composition for regulating the development of plants, characterized in that it comprises a synergistic mixture consisting of (a) a compound as a plant growth regulator consisting of a triazole derivative of the general formula (Id) in which: A represents a phenyl group substituted with a halogen atom and b) from 2-chloroethylphosphonic acid, wherein the weight ratio of component a), i.e. the triazole derivative of the general formula Id, to component b), i.e. 2-chloroethylphosphonic acid, is 30: 1 to 1:30. Composition according to claim 1, characterized in that the weight ratio of component a), i.e. the triazole derivative of the general formula Id to component b), i.e. 2-chloroethylphosphonic acid,