KR100353181B1 - Seed treatment using phosphorous acid or one of its inflammations, and the seed so treated - Google Patents

Abstract

Triazole 2-(4-chlorobenzylidene) -5,5- dimethyl-1-(1H-1,2,4-triazole-1-ylmethyl)-cyclopentanol, phosphorous acid or its A seed characterized by containing an effective amount of an active substance selected from the group consisting of salts in or on the grains in terms of fungicide.

Triazole 2-(4-chlorobenzylidene) -5,5- dimethyl-1-(1H-1,2,4-triazole-1-ylmethyl)-cyclopentanol, phosphorous acid or its A monocotyledonous plant seed characterized by containing an effective amount of an active substance selected from the group consisting of salts in or on the grains in terms of fungicide.

Description

Seed treatment with phosphorous acid or one of its salts, and the seed so treated

The present invention relates to plant seeds protected against the invasion of fungal diseases, fungicidal compositions for obtaining these seeds so protected and seed treatment methods for obtaining protected seeds.

More advantageously, the present invention relates to monocotyledonous plant seeds protected against invasion of fungal diseases, useful fungicidal compositions for obtaining these seeds protected and seed treatment methods for obtaining protected seeds.

It is known that the treatment of phosphorous acid and its derivatives with leaves can be used to control fungal diseases of plants (Patent GB 1,459,539), but this application has not been practically used due to the harmfulness to plants of compositions containing these components ( European Patent Application No. 230,209).

Surprisingly, it is possible to obtain compositions having a good protective effect against seeds and the plants resulting from the germination of seeds by using phosphorous acid or derivatives thereof, without being confused by the harmfulness of the plants. I found out.

Within the meaning of the present invention, the seed refers to the reproductive part of the plant (proliferative substance) which can be used for the reproduction of the plant. It may be used for seedlings (cuttings), cell cultures or for example obtained from seed grains (narrower seeds), roots, rhizomes, fruits, tubers, bulbs, plant parts, germinating plants, seed grains by any method of propagation. For example, artificial seeds such as those described in patent application FR 9305192 or PCT / FR 91/00984 (WO 92/10087).

More specifically, the present invention relates to triazole 2- (4-chlorobenzylidene) -5,5-dimethyl-l- (1H, 1,2,4-triazole-1-ylmethyl) -1-cyclopentanol. In the absence, it relates to a natural or artificial seed of a monocotyledonous plant, characterized in that it contains an effective amount of an active substance selected from the group consisting of phosphorous acid or salts thereof in or on the grains.

Phosphoric acid, also known as phosphonic acid, is the product of the formula HP (0) (OH) ₂ (abbreviated as H ₃ PO ₃ ). The salts thereof are known as phosphites and may be one or _two salts, preferably alkali metal salts or ammonium salts, in particular Na ₂ HPO ₃ , K ₂ HPO ₃ or NH ₄ H ₂ PO ₃ .

At a practical level, the effective amount of the active substance in the form of retained phosphorus is generally 1 g / q to 1 kg / q (q is the abbreviation of quintle = 100 kg), preferably 5 to 500 g / q.

The seed grains are preferably coated at a ratio of 1 to 500 g of active material and preferably 5 to 300 g / quint per quint of seed grain.

The active substance in the form of phosphorus preferably has a solubility in water at 20 ° C. of at least 0.1 g / l, more preferably at least 0.5 g / l, even more preferably at least 50 g / l. Lower solubility actives can also be used, but it is necessary to use quite complex formulations, for example wettable powders or aqueous suspensions. As mentioned above, it is advantageous in that the use of an active substance having a sufficiently high solubility itself allows the seed to be treated using a simple solution which is very economical.

According to the first variant. The present invention also relates to young plants produced from the germination of the seeds just described above, which young plants are in one or two lobe stages.

The young plants thus produced are all the more notable because the remaining phosphorous acid is expected to have a phytotoxic effect on plants resulting from germination, in the same way as to have a phytotoxic effect in the leaf treatment.

In particular, the present invention is advantageous for the protection of seeds against fungal diseases corresponding to crops, in particular wheat, barley, rye, autumn barley, oats, tritice, corn or rice.

The present invention

* Pythium arrhenomanes, Pythium graminicola, Pythium torulosum, Pythium vanterpoolii, Pythium myriotylum ), A disease belonging to the group consisting of Pythium periilum, Pythium aristosporum, Pythium aphanidermatum,

* Malaseed is a bottle,

Root rot,

* Collar rot of young plants,

Particularly advantageous for the protection of seeds against.

The invention also

At least one active substance selected from the group consisting of phosphorous acid or salts thereof,

One or more agriculturally acceptable inert excipients,

Any agriculturally acceptable crab active agent,

* Several of these compositions other than triazole 2- (4-chlorobenzylithene) -5,5-dimethyl-l- (1H-1,2,4-triazole-l-ylmethyl) -cyclopentanol ingredient,

It relates to a fungicidal composition for protecting the seed, preferably the seed of the monocotyledonous plant, against fungal diseases.

The composition according to the invention generally contains from 0.5 to 95% by weight of the active substance in the form of phosphorus. Preferably, the amount of active substance in the phosphorus form in such a treatment formulation is greater than 5% (weight).

In addition, the present invention is characterized by applying an effective amount of the fungicidal active substance and / or fungicidal composition as described above to the seed, to protect the seed, preferably the seed of the monocotyledonous plant, against the fungal disease. It is about a method. According to the method of the invention, the application of the fungicidal actives in the form of phosphorus is carried out using a composition containing at least 5%, preferably at least 10% of the active materials in the form of phosphorus.

In the present invention, the term "excipient" refers to a natural or synthetic, organic or inorganic material which is combined with the active material to facilitate its application to the seed. Therefore, this excipient should be generally inert and agronomically acceptable, especially to the seed to be treated. Excipients may be solid (clay, natural or synthetic silicates, silica, resins, waxes, solid fertilizers, etc.) or, preferably, liquids (water, alcohols, ketones, petroleum fractions, aromatic or paraffinic hydrocarbons, chlorinated hydrocarbons). , Etc.) As mentioned above, liquid excipients are preferred, especially liquid excipients in which the phosphorus active substance is soluble, more specifically water and aqueous solutions.

The surfactant may be an emulsifier, dispersant or wetting agent in ionic or nonionic form. Examples include salts of polyacrylic acid, salts of lignosulfonic acid, salts of phenolsulfonic acid or naphthalenesulfonic acid, polycondensates of fatty alcohols or fatty acids or fatty acid amines with ethylene oxide, substituted phenols (especially alkylphenols or arylphenols), sulfo Mention may be made of ester salts of succinic acid, taurine derivatives (particularly alkyltaurates), or phosphoric acid esters of polyoxyethylene-based phenols or alcohols. The presence of one or more surfactants is often necessary.

These compositions may also contain various other components such as, for example, protective colloids, adhesives, thickeners, thixotropic agents, penetrants, stabilizers, metal ion sequestrants, pigments, dyes or polymers and the like.

More generally, the compositions according to the invention can be mixed with all solid or liquid additives, which correspond in particular to conventional formulation techniques for seed treatment applications.

In this known vocabulary with respect to the subject matter, seed treatment is in fact mainly concerned with the treatment of seed grains.

Application techniques are well known in the art and they can be used without detrimental to the teachings of the present invention.

For example, mention may be made of a film coating or a coating. Coating is preferred in the present invention because of its simplicity; The seeds to be treated with the fungicidal composition according to the invention are sufficiently stirred or mixed.

Among the compositions, mention may generally be made of solid or liquid compositions.

As the form of the liquid composition or the form which is intended to constitute the liquid composition in application, mention may be made of solutions, in particular water soluble concentrates, emulsifiable concentrates, emulsions, suspension concentrates or wettable powders (or powders to be sprayed).

Emulsifiable or soluble concentrates most often contain from 10 to 80% of active substance, whereas emulsions or solutions prepared for application contain from 0.01 to 20 parts by weight of active substance relative to their parts by weight.

For example, in addition to solvents, emulsifiable concentrates may contain from 2 to 20% of suitable additives such as stabilizers, surfactants, penetrants, corrosion inhibitors, dyes or adhesives as described above, if desired.

From these concentrates, an emulsion of a desired concentration can be obtained which is particularly suitable for application to seeds by dilution with water.

Wettable powders (or powders to be sprayed) are generally prepared to contain 20 to 95% of active substance, and in addition to solid excipients generally 0 to 5% wetting agent, 3 to 10% dispersant and, if necessary, 0 to 10 % One or more stabilizers and / or other additives such as dyes, pigments, penetrants, adhesives, anticoagulants, and the like.

As mentioned above, compositions obtained by dilution of aqueous dispersions and emulsions, for example wettable powders or emulsifiable concentrates according to the invention with water, are generally included within the scope of the invention. The emulsion may be in the form of water in oil or oil in water, and may have a high concentration such as “mayonnaise”.

Among these compositions, the skilled person can advantageously select a suitable method depending on the conditions of use.

In the present invention, the phosphorus derivatives alone or in mixtures, in particular fungicides or insecticides, in particular captane, tyram, aspirin or salts and esters thereof, salicylic acid or salts and esters thereof, guaztine, auxin-copper, te It can be used as a mixture with flutrines, anthraquinones or metallacyls and as a mixture with insecticides such as imidacloprid, lindane and endosulfan, or as a mixture of these various products.

The following examples illustrate the present invention without limiting it and indicate how to use it.

Example 1

100 g of barley seed grains are treated with 1 5 ml of aqueous phosphorous acid solution. The specific concentration of the treatment solution is calculated to obtain the amount (g / q) of the product shown in the table below on the seed. In the case of an amount of 100 g / q, the concentration of phosphorous acid in water is 75 g / l.

The treatment is carried out by simple mixing / stirring for 1 minute to obtain seeds containing various concentrations of phosphorous acid shown in the table below.

These seed grains are placed in a pot containing a mixture of peat and ash. 1 ml of Pitium hyphae ground preparation is sprayed into the soil and inoculated into each pot. There are about 20 seed grains per pot.

The germinated seed grains after 15 days of sowing and the condition of the plants are observed in comparison to the control seed grains not treated with phosphorous acid and the control seed grains not inoculated with phytium. All germinated plants have two leaves. In no case was plant toxicity observed.

The results are shown in the table below:

Example 2

Barley seed grains are treated with aqueous dipotassium phosphite solution as in Example 1. In order to obtain an amount of 240 g / q of product on the seed, 100 g of seed are treated with 1.5 ml of a solution containing 180 g / l of K ₂ HPO ₃ .

Treatment of the seeds is carried out in order to have 240 g / q of phosphite on these seeds.

Thus treated seed grains are sown in unpartitioned land and the condition of the crops is observed after 72 days compared to the untreated control. All of these crops are affected by fungal infiltration of Pythium arrhenomanes.

Compared to the untreated plants, the plants subjected to the treatment according to the invention contain at least 2.8 times more roots and the plants themselves are 24.3% larger in number. The weight of the dry matter in the roots of the treated plants was as high as 39% compared to the untreated plants.

Claims (17)

In the absence of triazole 2-(4-chlorobenzylidene) -5,5- dimethyl-1-(1H-1,2,4-triazole-1-ylmethyl) -cyclopentanol, phosphoric acid or its A grain seed, characterized in that it contains an effective amount of an active substance in or on the surface of the grain, in terms of fungicide, selected from the group consisting of salts. The seed according to claim 1, wherein the phosphorus active material contains phosphorous acid or one of its alkali metal or ammonium inflammations. The seed according to claim 1, wherein the phosphorus active material is selected such that its solubility in water is at least 0.1 g / l at 20 ° C. The seed according to claim 1, wherein the phosphorus active material is in an amount of 1 g / q to 1 kg / q. The method of claim 1, * Pythium arrhsnomanes, Pythium graminicola, Pythium torulosum, Pythium vanterpoolii, Pythium myriotylum ), A disease belonging to the group consisting of Pythium periilum, Pythium aristosporum, or Pythium aphanidermatum, * Malaseed is a bottle, Root rot, * Collar rot of young plants, Seeds, characterized in that they are protected against invasion of pests from the group consisting of: The method according to claim 1, which comprises a secondary active substance selected from the group consisting of captane, thiram, guazin, auxin-copper or metallaxyl as well as insecticides such as imidacloprid, lindane and endosulfan copper. strain. The seed according to claim 1, which contains a secondary active substance selected from the group consisting of aspirin or its salts and esters or salicylic acid or its salts and esters. A young plant, which is produced from the germination of a seed according to any one of claims 1, 2 to 4, and 5 to 7. A method for protecting a seed against fungal diseases, characterized by applying an effective amount of a phosphorus active substance contained in the group consisting of phosphorous acid and salts thereof to the seed. At least one active substance selected from the group consisting of phosphorous acid or salts thereof, One or more agriculturally acceptable inert excipients, Any agriculturally acceptable surfactant, * Several of these compositions other than triazole 2- (4-chlorobenzylidene) -5,5-dimethyl-l- (lH-l, 2,4-triazole-l-ylmethyl) -cyclopentanol ingredient, A fungicidal composition for protecting seeds against fungal diseases, characterized in that it contains. A composition according to claim 10, which contains from 0.5 to 95% of the active substance in the form of phosphorus. The composition of claim 10 or 11 wherein the composition is an aqueous solution or a liquid. The seed according to claim 3, wherein the phosphorus active material is selected such that its solubility in water is at least 0.5 g / l at 20 ° C. The seed according to claim 4, wherein the phosphorus active material is in an amount of 5 to 500 g / q. The seed of claim 1, wherein the grain is wheat, barley, rye, autumn barley, oats, triticale, corn or rice. The method of claim 10, wherein the seed is a seed of a monocotyledonous plant. The fungicidal composition according to claim 11, wherein the seed is a seed of a monocotyledonous plant.