CS218346B1 - Stimulator of thr plant growth - Google Patents

Abstract

The invention relates to a plant growth stimulator, which contains substances actively complementary some natural phytohormones in plants. Contains a mixture of aminobenzoic acids of formula I, nitrophenols of formula II wherein R is hydrogen or alkyl of one to four atoms in the chain. COOW OH 1 11 Mixtures of both types of compounds by weight a ratio of 5: 1 to 1: 5 can be used in the form aqueous solutions containing only 5.0 up to 0.1 mg of active ingredients in 1000 ml of water. When applying these solutions to plant seeds increases their germination, leveling out germination of seeds, increase of fibrous growth increases roots. When applied to already grown plants are facilitated by rooting them during transplanting and their overall improvement is improved appearance. Stimulator can be used not only in gardening, but also in agricultural practice.

Description

Mixtures of both types of compounds in a weight ratio of 5: 1 to 1: 5 can be used in the form of aqueous solutions containing only 5.0 to 0.1 mg of active ingredients in 1000 ml of water. The application of these solutions to the seeds of the plants increases their germination, equalizes the germination of the seeds, increases the growth of fibrous roots. When applied to already grown plants their rooting during transplanting is facilitated and their overall appearance is improved. The stimulator can be used not only in horticultural but also in agricultural practice.

¹ The invention relates to a plant growth stimulator, which contains additional active substances, some natural phytohormones in plants.

In current agricultural and especially horticultural practice, plant growth promoters are used to increase or equalize the germination of seeds, accelerate the rooting of cuttings and transplants, influence flowering and fertility of useful plants and favorably influence crop harvesting. Most stimulators are used in the form of solutions, dusts and pastes, which contain very low concentrations of synthetically produced phytohormones. Newer types of stimulators are just precursors to natural phytohormones. It is only biochemical processes in plants that produce stimulating substances. Examples of such precursors are, for example, N, N, N-trimethyl-2-chloroethanaminium chloride (chlorocholine chloride - - GCC), which is metabolized to the simplest phytohormonethene in plants.

We have paid attention to relatively simple substances, which can be assumed by the biochemical pathway in plants to be metabolized to very potent phytohormones by considerably more complex structures than ethene. It has been found that some aromatic nitro compounds and aminobenzoic acid derivatives may be auxin-type precursors.

The present invention provides a plant growth promoter comprising a mixture of aminobenzoic acids of formula I wherein the amino group may be in the 2, 3 or 4 position and nitrophenols of formula II wherein R is hydrogen or alkyl of one to four carbons, the alkyl

COOh OH

it may be in the 2, 3 or 4 position relative to the hydroxyl and the nitro group in the remaining free positions. The compounds of the formulas I and II 'can also be used in the form of ammonium salts or alkaline and alkaline earth metal salts in a weight ratio of 5: 1 to 1: 5, preferably in a ratio of 3: 1 to 1: 3.

In addition to the active ingredients, the stimulant composition comprises excipients such as wetting agents, drop retardants such as low molecular weight polyethylene glycols, pH stabilizers, and the like.

The most suitable application form of the stimulator composition according to the invention is the use of aqueous solutions or concentrates in water-dilutable organic solvents or even in the form of powders and dusts.

An essential advantage of the stimulator according to the invention is that it acts at very low concentrations, especially when aqueous solutions are used.

^The stimulant solution contains, for example, 1 part stimulator mixture 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 stimulator promotes 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, as it also actively interacts with phytohormones already present in plants, whereby plants, especially ornamental ones, have a more attractive appearance.

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

Example 1

A mixture of 1 part of 2-aminobenzoic acid and 2 parts of 2-nitro-4-methylphenol was diluted with water to a solution containing 1 mg of active substances in 1000 ml of water. Cucumber seeds (Cucimis sativus L., var. Znojmiaj) were submerged in the resulting solution for 6 hours, after which the seeds were dried between filter papers and placed in 90 mm diameter Petri dishes in which filter paper was placed.

After adding 5 ml of distilled water, the dishes were tempered for 5 to 7 days at 20 to 22 ° C. After this time, the root and germ lengths were measured and compared to control germs whose seeds were soaked only in water. It was found that the growth of germs soaked in a mixture of 2-aminobenzoic acid and 2-nitro-4-methylphenol increased substantially with roots by 95% and germs by 35% compared to control. When a solution containing 1 mg of nicotinic acid amide is taken, the root increase only increased by · 25% and the germ decreased by 11% compared to the control. Similar results were obtained with other auxin-type phytohormones.

Examples 2 to 5

Under the conditions of Example 1, additional mixtures of aminobenzoic acids and nitrophenols were tested. The composition of the mixtures, their concentration and effects, expressed as relative percentages of root growth to control plants, are given in the following table:

218343

Mixture components (component parts)

Concentration used (increase in mg in 1000 ml of water) (rel.%) 2-aminobenzoic acid (3)

2-nitro-4-methylphenol (1) 4-aminobenzoic acid (1) 4-nitro-2-methylphenol (1) 3-aminobenzoic acid (1) 4-tert-butyl-2-nitrophenol (2 j 3-aminobenzoic acid) (5)

3-nitrophenol (1)

3.0 62.0 2,0 45.0 0.2 77.0 1.0 ^; 25.0 3.0 ’25.0

Example 6

1.0 g of 2-amino-benzoic acid, 1.0 g of sodium hydroxide and 1.5 g of 4-methyl-2-nitrophenol are successively dissolved in 800 ml of demineralized water at 40 DEG-50 DEG C. to give a bright red solution. 5.0 g of diethylene glycol or glycerol and 1.0 g of a 50% solution of sodium bis-2-ethylhexyl ester of 2-sulfobutanedioic acid (manufactured under the designation Spolion 8) are added. Make up to 1000 ml with water.

For use, the stimulator concentrate is diluted with water, most often in the ratio: 1000 to 1: 10,000. Asparagus Sprengeri L. seeds are soaked in a 1: 4000 dilution solution for 12 hours. The seeds were sown in the horticultural substrate and after three weeks 95% of the seeds germinated, whereas in the control experiment (seeds soaked only in water) only 15% of the seeds germinated. The chrysanthemum cuttings were soaked for 2 hours in the same diluent stimulator solution and then planted in propagating soil. After five to seven days, the roots appeared and the plants were significantly better in appearance than the control plants.

Claims (1)

SUBJECT A plant growth stimulator comprising a mixture of aminobenzoic acids of formula I wherein the amino group may be in the 2, 3 or 4 position and nitrophenols of formula II wherein COOH OH VYNALEZU R is hydrogen or alkyl of one to four carbons, wherein the alkyl may be in the 2, 3 or 4 position relative to the hydroxyl group and the nitro group in the remaining free positions and the active ingredients are also in the form of ammonium or alkaline or caustic salts; in a weight ratio of 5: 1 to 1: 5, preferably in a ratio of 3: 1 to 1: 3.