DE1004857B - Liquid seed dressings - Google Patents

Description

Liquid seed dressings It is known to fungal diseases of the seed grain Combat with organic mercury compounds before sowing.

Two pickling processes are used for this, the dry pickling and the wet pickling process. Both methods have disadvantages. The dry pickling process is more inevitable Dust that is poisonous and harmful to workers' health.

In most cases, the wet pickling process involves re-drying of the dressed seeds required to avoid germ damage when storing the dressed To prevent grain.

It has also been suggested to use oily stains. With these Dressing 200 g per 100 kg of seed is enough to cover the grains fairly evenly. However, their use has often caused damage to bacteria.

It is also known that one can use for the production of liquid seed dressing organic mercury compounds or non-metallic organic fungicides dissolved or suspended in high-percentage aqueous solutions of salts. As such Salts come into question: calcium chloride, magnesium chloride and others. You need for this also solubilizers, dispersants or emulsifiers.

Another method is to use viscous aqueous colloid solutions in conjunction with organic mercury compounds for the same purpose.

However, these methods have major disadvantages. Most of the time Cases are emulsions and dispersions, i. i.e., the active ingredients are not or only partially solved. However, this is not a guarantee during the pickling process given that with continuously operating pickling devices a uniform distribution takes place on the seed, d. i.e. overdosing and underdosing can easily occur, which question the staining effect.

Another disadvantage is that an aqueous solution or Dispersion wets the seed or runs on the seed more heavily than this z. B. is the case with organic solvents.

According to Austrian patent specification 169 822, aliphatic Mercury compounds dissolved in water and / or other solvents and with this solution dressed the seeds without further dilution.

However, aromatic mercury compounds do not have the solubility in water and / or other volatile solvents such as the aliphatic, the are given in the examples of the Austrian patent specification.

For example, phenylmercuric acetate is found in alcohol at normal Temperature only very sparingly soluble, so that it is not possible to use it in such quantities to solve as it is needed for seed dressing purposes.

It has now been found that the addition of such alkali or Ammonium salts of organic acids that are soluble in alcohol, such as ammonium acetate, Potassium rhodanide, potassium propionate and similar organic mercury compounds, which are themselves sparingly soluble in alcohol, surprisingly in alcohols to solve.

It was also found that, for. B. Phenylmercuric Acetate, which is dissolved in water is almost insoluble, not from the alcoholic solution when diluted with water fails, so that the seed can also be used in this way in all wet dressing processes, such as immersion stain, short stain, wetting stain, can stain.

However, it is not essential for the production of the liquid stain necessary to add the finished salts but you can use these in the manufacture of the liquid stain through chemical reaction of the components. Even in these cases a solution occurs.

Mixtures of organic mercury compounds can also be dissolved in this way will. Mixtures of solvents can also be used.

Furthermore, insecticides, wetting agents and adhesives, dyes, etc. to be added.

200 g of this liquid stain are sufficient z. B. to 100 kg of wheat or Cover barley or rye evenly. For oats you need 250 to 300 g, for beet seeds 500 to 600 g per 100 kg.

example 1 Phenyl mercury acetate. . . . . . . . . . . . 4.20 /, Ammonium acetate. . . . . . . . . . . . . . . . . . 10.0% Methanol. . . . . . . . . . . . . . . . . . . . . . . . . 85.80 /, 100.00 /, 2 g of this solution, made up to 1 kg of wheat, are sufficient to prevent infection from wheat stone brandy. Example 2 Phenyl mercury salicylate. . . . . . . . . . 4.80 / 0 Ammonium propionate. . . . . . . . . . . . . . 8.00 /, Ethanol ........................... 87.2 % 100.00 / 0 3 g of this solution, made up to 1 kg of oats, are sufficient to prevent infection from oat smut.

Claims (4)

PATENT CLAIMS: 1. Liquid seed dressings, consisting of alcoholic solutions of aromatic mercury compounds, using such alkali or ammonium salts of organic acids, which are soluble in alcohols, as solubilizers. 2. seed dressing according to claim 1, characterized in that that they contain an addition of water. 3. Seed dressing according to the claims 1 and 2, characterized in that they take the place of the salts mentioned in claim 1 contain the components of these salts, from which, when exposed to water, the relevant Salt is created by chemical reaction. 4. Seed dressing according to the claims 1 to 3, characterized in that they are soluble in the solvents used Contains wetting agents and adhesives, dyes, insecticides. Considered publications: German Patent No. 514 684; German patent application K 8031 IVa, 451.