CS226915B1 - Plant growth regulating composition - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention -one-4-yl] urea.

The use of N-arenesulfonyl-N '- (1,2,4-triazin-3-yl) ureas as active ingredients of herbicidal compositions for the pre-emergence and post-emergence control of undesirable vegetation has been known from the literature (U.S. Pat. No. 4,120,691). however, it can also be used to modify the growth of certain plant species.

It has now been found that N-p-toluenesulfonyl-N- [3-methylthio-6,1,1-dimethyl] - (1,2,4-triazin-5 (4H) -one-4-yl) urea of formula I

(I) is effective as a plant growth regulator. The growth regulators according to the invention stimulate the growth of germinating plants and young plants, which is manifested by an increase in the root system, a faster development of the above-ground parts of the plants, an increase in the planted fruit, faster ripening and increased fruit yield. The overall quality of plants and fruits will also improve. By applying the compositions of the present invention, it is possible to increase the competitive ability of crops against unstimulated weed flora. Crop treatment also improves the growth potential of crops under unfavorable conditions, such as low nutrient content in the diet, insufficient or high soil moisture. By applying the compositions of the invention, the resistance of plants to fungal diseases can also be increased.

Regulation of crop growth by means of po228915

226315 according to the invention is achieved by application at various stages of crop development, either pre-emergence or post-emergence. The active ingredient of the composition according to the invention can be taken up by the plants through the roots when applied to the soil or by spraying the leaves on the aerial parts of the plants.

Application of the composition of the invention is. this may be done by seed dressing or by spraying, watering, spraying, spreading on whole plants, on the soil surface or by incorporation into the soil.

Suitable application formulations of the compounds of formula I may be prepared in a conventional manner. They may be solutions, emulsions, dispersions, suspensions, wettable powders, dusts, pastes, granules or microgranules, with the addition of liquid and / or solid carriers, optionally diluents, wetting agents, adhesives, binders, modifiers, surfactants, emulsifying and / or dispersing agents. anti-foaming agents and dyes.

Suitable liquid carriers are paraffinic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, petroleum fractions, alcohols, polar solvents such as dimethylformamide, dimethylsulfoxide. Suitable solid carriers are kaolin, alumina, chalk, dolomite, diatomite, precipitated silica, alkaline earth metal silicates, calcium and magnesium sulphates and others.

In addition, stabilizing additives and / or non-ionic, anionic and cationic agents can be added which improve the adhesion of the active substances to the plants and / or ensure better wettability as well as dispersibility.

Suitable adhesives are cellulose derivatives, methylcellulose, carboxymethylcellulose, hydroxyethylene glycol ethers of mono- and dialkylphenols, ligninsulphonic acid, its alkali and alkaline earth metal salts, polyethylene glycol ethers, polyglycol ethers of fatty alcohols, condensation products of ethylene oxide and propylene oxide, propylene ethylene oxide, and propylene oxide.

Methods for preparing said formulations are known. Solutions are prepared by mixing the individual components. Wettable powders are prepared by mixing and grinding the components together. Suspensions are prepared by co-grinding the individual components in a stirred wheel mill. Granules and microgranules may be prepared by agglomeration, impregnation or coating, optionally by encapsulation.

The proportions of the active compounds in the compositions according to the invention can be varied within wide limits and can range from 0.01% to 95% by weight. The amount of active compound of formula I used to treat the crop to stimulate growth is 0.005 kg. . ha ^-1 to 0.2 kg. ha ^-1 and is dependent on the active ingredient selected, the formulations used, the desired effect, the type of crop to be treated, the method of application and the date of application.

The active compounds of the invention can be used either alone or in admixture with each other.

The following examples illustrate but do not limit the invention.

Example 1

In PVC containers (30.5 X 38.5 X 4 cm), filled with standard clay loam soil, they were sown into rows of corn plants (Zea mays) as test objects. After planting and leveling the soil, it was easily covered with water. The wettable powder formulations were applied in graduated concentrations pre-emergence to the soil surface.

Evaluation of efficacy was performed by measuring height, weighing the dry matter of the aerial parts 4 weeks after sowing.

The results are shown in the following table.

Height and weight of maize plants after treatment with Np-toluenesulfonyl-N '- [3-methylthio-6- (1,1-dimethyl) -1,2,4-triazin-5 (4H) -one-4-yl] urea.

Dose in kg. ha ^-1 Average height% of control Average weight-% of plant control in cm of plant weight in g

0,158

40.6

100 14.7 100

156 40.2 273.4

Example 2

The experimental method was the same as in Example 1 except that oat (Avena sativaj, white clover (Trifolium repens) and wolf (Vicia sativa) were used as test objects.

The results are shown in the following table.

WITH

Test plant weight expressed as% of control after treatment with Np-toluenesulfonyl-N '- [3-methylthio-6- (1,1-dimethyl) -N' - [3-methylthio-8- (1,1-dimethylethyl) -1] 2,4-triazin-5 (4H) -one-4-yl] urea.

Dose of active substance in kg.ha ^-1 Oats Clover white Vika siata 0,158 133.0 141.1 109.0 0,050 125.8 130.9 115.0 ϋ 0.0158 147.7 175.0 102.8 0,005 122.2 158.0 122.5 0 100 100 100

OBJECT OF THE INVENTION

Claims (1)

A composition for controlling plant growth of? -6- (1,1-dimethylethyl) -1,2,4-triazin-5 (4H), characterized in that it contains N- [p] -toluenesulfonyl (-N'-) 3-methylthio□ SO, SCH,