CS260431B1 - Plant growth regulator - Google Patents

Abstract

A mixture of 2-, 3- or 4-aminobenzoic acids of formula I and 2-, 3- or 4-acylaminophenols of formula II, where R is an alkyl, alkoxyl or alkylamino group with up to four carbons in the chain, has a pronounced stimulating effect on plant growth.

Description

The present invention relates to a plant growth regulator which comprises substances actively supplementing certain natural phytohormones in plants.

In current agricultural and especially in horticultural and breeding practice, plant growth regulators are used to increase or equalize the germination of seeds, accelerate rooting of cuttings and transplanting plants, influence flowering and fertility of useful plants and favorably influence crop harvesting. Most regulators are used in the form of solutions, dusts and pastes, which contain very low concentrations of synthetically produced phytohormones. Newer types of regulators are just precursors of natural phytohormones. It is only biochemical processes in plants that produce substances of regulatory effects. An example of these precursors is Ν, Ν, Ν-trimethyl-2-chloroethanaminium chloride (Chlormequstj, which in plants is metabolized to the simplest phytohormone - ethene.

Attention has therefore been paid to relatively simple substances, which can be assumed to be metabolized to highly potent phytohormones by a biochemical pathway in a substantially more complex structure than ethene. Some derivatives of aminobenzoic acids may be precursors of suxin-type phytohormones and aminophenol derivatives are precursors of phenolic substances controlling suxin activity.

The subject of the present invention is a plant growth regulator comprising a mixture of 2-, 3-, 4-aminobenzoic acids of formula I and 2-, 3-, 4-acylamidophenols of formula II, wherein R is alkyl, alkoxy, aminoalkyl of one to four atoms carbon in the chain, wherein

COOH

the active ingredients are in a weight ratio of 1:10 to 10: 1. The compounds of the formulas I and II can also be used in the form of ammonium salts or alkaline or caustic earth metal salts.

In addition to the active ingredients, the composition comprises excipients such as wetting agents, drip retardants, pH stabilizers, and the like. The most suitable application form of the composition of the present invention is the use of aqueous solutions or concentrates in water-dilutable organic solvents or powder. i trap.

An essential advantage of the growth regulator of the present invention is that it acts at very low concentrations, especially when aqueous solutions are used. The application solution contains, for example, 1 part of a mixture of active ingredients in 1,000,000 to 10,000,000 parts of water. Seeds soaked in this solution for several hours evenly germinate and more easily rooted. The regulator supports the growth of fibrous roots. Its use, especially in transplanted plants, creates conditions for their rapid development. It can also be applied to already grown plants, whereby plants, especially ornamental ones, have a more attractive appearance.

The following examples illustrate but do not limit the effects of the composition of the invention.

He did

A mixture of 1 part of 2-aminobenzoic acid and 2 parts of 4-acetylamidophenol was diluted with water to a solution containing 1 mg of active substances in 1000 ml of water. Cucumber seeds [Cucumis sativus L., var. Remove) for 6 hours. After this time, the seeds were dried between filter papers and placed in 90 mm diameter Petri dishes in which the filter paper was placed. After adding 5 ml of distilled water, the dishes were tempered for 5 to 7 days at 22-23 ^° C. After this time, the lengths of roots and germ were measured and compared to control germs whose seeds were soaked only in water. It was found that the growth of germs soaked in the active ingredient mixture increased substantially, with roots by 95% and germs by 35% / o relative to control.

When a solution containing 1 mg of nicotinic acid amide is used, the root increase only increased by 25% and the germ decreased by 11 percent relative to control plants. Similar results were obtained with other phytohormones of the suxin type.

Examples 2 to 6

Additional mixtures of aminobenzoic acids and acylamidophenols were tested under the conditions of Example 1. The composition of the mixture, the concentrations and effects used, expressed as relative percentages of root growth to control plants, are as follows:

Mixture ingredient (ingredient parts)

Concentration used Increase (mg in 1000 ml water) (rel.%)

3-Methoxycarbonylaminophenol (10) 4-aminobenzoic acid (1)

4- (3-methylureido) phenol (2) 2-aminobenzoic acid (1)

3-Propionylamidophenol (3) 3-aminobenzoic acid (1)

3-Acetylamidophenol (5) 2-aminobenzoic acid (2)

2-butyroylamidophenol (2) 2-aminobenzoic acid (3)

3.0 130.0 2,0 115.0 2,0 125.0 5.0 127.0 3.0 113.0

The stimulatory effect of the pure phenolic components is observed at concentrations of 20 to 300 mg of active ingredients per liter of solution. At concentrations above 300 mg in 1 liter of solution, most phenolic substances exhibit root growth inhibitory effects. For aminobenzoic acids, the stimulating effect is observed at concentrations of 10 to 200 milligrams per liter of solution. In the above examples of mixtures of active substances, there is always a significant synergistic effect.

Example 7

Concentrate of composition: 3.0 g of 4-acetylamidophenyl, 1.0 g of 2-aminobenzoic acid, 1.0 g of sodium hydroxide, 25 ml of a 50% solution of sodium bis (2-ethylhexyl ester) sulfobutanedioic acid, 100 ml of formamide in 1000 ml of aqueous solution was diluted with water in a ratio of 1: 4000. The resulting solution was immersed in chrysanthemum, dahlias, carnation herbal cuttings for 2 to 6 hours, after which time the cuttings were transplanted into the propagating substrate. against control.

Example 8

Concentrate containing 1.0 g of 4-acetylamidophenol, 3.0 g of 2-aminobenzoic acid, 15 ml of 25% ammonia, 10.0 g of a non-ionic surfactant having an MLB value of 7 to 10, 150 ml of ethanediol and 0.001 g of blue dye in 1000 ml aqueous solution was diluted with water in a ratio of 1: 2,000. The resulting solution was immersed in the basal ends of yew cuttings (Texus baccata L.} for 5 hours. After only three weeks, the cuttings formed callus, from which a further 3 to 4 The rooting effect was 85-90%.

Under the same conditions, 3-indolylbutyric acid at a concentration of 10 ppm was used. The degree of rooting was only 50% after the same time.

Example 9

In a powder containing 0.1-2-aminobenzoic acid and 0.2 g of 4-acetylamidophenol in 100 g of talc, cuttings of geraniums were dipped and immediately embedded in the propagating substrate. Already after 14 days the cuttings were 95% rooted.

Example 10

A mixture of 1.0 g of 4-acetylamidophenol, 0.3 g of 2-aminobenzoic acid, 20 g of citric acid, 20.0 g of sodium bicarbonate, 1.0 g of a low-foaming non-ionic surfactant, 100.0 g of glucose and 0, 2 g of aluminum stearate was compressed into tablets weighing 0.2 g. The tablet, thrown into 1000 ml of water, dissolves rapidly and forms a regulator solution that can be used immediately for plant treatment.

Claims (1)

A plant growth regulator comprising a mixture of 2-, 3- and 4-aminobenzoic acids of the formula I and 2-, 3- and 4-acylaminophenols of the formula II in which R is an alkyl, alkoxy or alkylamino group, in each case having from one to four carbons in the chain, VYNALEZU OH COOH The NH-COR and the active ingredients are in the ratio 10: 1 to 1: 10 also in the form of ammonium salts or alkaline or caustic earth metal salts.