PT101533B - SEED TREATMENT WITH PHOSPHORUS ACID OR ONE OF ITS SALTS AND ASSIMPED SEEDS. - Google Patents

Description

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

PATENT SERVICES DIRECTORATE

SUMMARY SHEET (Continued)

Order date (22)

Summary (continued) (57) active ingredient chosen from the group consisting of phosphorous acid or its salts, in the absence of triazole-2- (4-clobenzylidene) -5,5-dimethyl-l- [1H-1,2,4 -triazol-1-yl-methyl] -1-cyclopentanol.

4 FILL IN THE SHADOW ZONES

The Official Industrial Property Agent

DESCRIPTION

SEED TREATMENT WITH PHOSPHOROUS ACID OR ONE OF THE

ITS SALTS AND SEEDS SO TREATED rr ^: ·· '-''The present invention relates to seeds of plants protected against attacks of fungal diseases, as well as antifungal compositions useful for obtaining the seeds thus protected, and a process of seed treatment to obtain protected seeds.

More advantageously, the present invention relates to seeds of monocotyledonous plants protected against the attacks of fungal diseases, as well as antifungal compositions useful for obtaining the seeds thus protected, and a process of treatment of the seeds to obtain seeds, protected .

It was known that it was possible to fight fungal diseases of vegetables by applying them to the leaves of phosphorous acid and its derivatives (British patent NQ 1459539), but this knowledge had no practical application.

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because of the phytotoxicity of the compositions containing such ingredients (European patent application No. 230209).

It has now been discovered in a surprising way that compositions with an excellent protective effect can be obtained with respect to seeds, and the plants from their germination, thanks to the protection of these seeds with phosphorous acid or its derivatives, without therefore protection is disturbed by untimely phytotoxicity.

In the present invention, the term seeds means all the parts capable of originating a plant (propagation material) and which can be used for the reproduction of that plant. This term includes grains (seeds in the strict sense), roots, rhizomes, fruits, tubers, bulbs, plant parts, germinated plants, young plants obtained by any method of propagation from grains , cuttings, cell cultures, artificial seeds such as those described in FR 9305192 or PCT / FR 91/00984 (published under WO 92/10087).

The present invention relates, more precisely, to seeds, natural or artificial, preferably of monocotyledonous plants, characterized by comprising, on the surface or inside the grains, an effective amount of an active principle chosen from the group consisting of phosphorous acid or

-3 its salts, in the absence of triazole -2- (4-chlorobenzylidene) -5,5-dimethyl-1- [1H-1,2,4-triazol-1-ylmethyl] -1-cyclopentanol.

phosphorous acid, also called phosphonic acid, is a product of the formula Η-Ρ (Ο) (ΟΗ) £ (short formula The salts of this acid are called phosphites and can be mono- or diphosphites, preferably salts alkali or ammonium, mainly sodium phosphite (^ 2 ^ 0 ^), potassium phosphite (K ^ HPO ^) and ammonium phosphite (NH ^^ PO ^).

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In practice, the effective amount of phosphorous-type active principle that is retained is generally between 1 g / q and 1 kg / q (q being the metric yard symbol corresponding to 100 kg), preferably between 5 and 500 g / q.

Preferably, the grains are coated at a rate of 1 to 500 g of active ingredient per one yard (100 kg) of grain and, preferably, 5 to 300 g / yard.

phosphorous-type active principle is chosen in such a way that its solubility in water at a temperature of 20 ° C is greater than 0.1 g / 1, preferably greater than 0.5 g / 1 and more preferably greater than 50 g / 1. Less soluble active ingredients can also be used, but in these cases it is necessary to prepare very elaborate formulations, for example wettable powders or aqueous suspensions. The use of principles

...

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-4Solutions of sufficiently high solubility as defined is advantageous because it allows to treat seeds using simple solutions, which is more economically advantageous.

According to a first variant, the present invention also relates to seedlings from seed germination as those previously defined, with such seedlings in the stage of one or two leaves.

. ' ^γ · - _ _ The obtaining of these plants is all the more remarkable as it would be expected that the residual phosphorous acid would exert a phytotoxic effect on the plants from the germination, as in the foliar treatment.

The present invention makes it possible in particular to protect crop seeds included in the group consisting of cereals, particularly wheat, including varieties of candial wheat and buckwheat, barley, including a early variety, rye, oats, maize and rice from fungal diseases.

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The present invention allows especially to protect oneself against diseases belonging to the group that includes Pythium arrhenomanes, Pythium graminicola, Pythium torulosum, Pythium vanterpoolii, Pythium myriotylum, Pythium periilum, Pythium aristosporum, Pythium aphanidermatum,

···. · - a: -4, .4. / -5th seed fusion (suppuration), root necrosis, necrosis of vital seedling nodes.

The present invention also relates to antifungal compositions intended to protect seeds, preferably from monocot plants, against fungal diseases, characterized by the fact that they contain:

at least one active ingredient chosen from the group consisting of phosphorous acid or its salts, at least one inert vehicle acceptable in agriculture, where appropriate (an acceptable surfactant in agriculture, the various constituents of these compositions being different from triazole-2- ( 4-chlorobenzylidene) -5,5-dimethyl-1- [1H-1,2,4-triazol-1-ylmethyl] -1-cyclopentanol.

The compositions according to the present invention usually contain between 0.5 Z and 95 Z (by weight) of an active principle of the phosphorous type. Preferably, the amount of

-6 active ingredient of the phosphorous type contained in these treatment formulas is greater than 5 Z (by weight).

The present invention also relates to a process to protect seeds, preferably from mono cotyledonous plants, against fungal diseases, characterized in that an effective amount of an antifungal active ingredient and / or an antifungal composition such as defined before. According to the process according to the present invention, the application of the fungicidal active principle of the phosphorous type is carried out using compositions containing at least 5 Z of phosphorous-type active principle, preferably at least 10 Z.

In the present invention the term vehicle designates an organic or mineral, natural or synthetic material to which the active ingredient is associated to facilitate its application on the seed. This vehicle is therefore generally inert and must be acceptable in agriculture, mainly on the seed treated. The vehicle can be solid (clays, natural or synthetic silicates, silica, resins, waxes, solid fertilizers, etc ...) or, preferably, liquid (water, alcohols, ketones, oil fractions, aromatic or paraffinic hydrocarbons , chlorinated hydrocarbons, etc. ...). As already mentioned, liquid vehicles are preferred, especially those, in which the phosphorous active ingredient is soluble, especially water and aqueous solutions.

surfactant can be an emulsifying, dispersing or wetting agent of an ionic or non-ionic type. For example, salts of poly (acrylic) acids, salts of lignosulfonic acids, salts of phenolsulfonic or naphthalenesulfonic acids, polycondensates of ethylene oxide with fatty alcohols, or fatty acids, or fatty amines, or substituted phenols alkyl-phenols or aryl-phenols), salts of esters of sulfosuccinic acids, derivatives of tauri (na (mainly alkyl-taurates) and phosphoric esters of 'alcohols or poly (oxyethylated) phenols. In the practice and frequent the presence of hair least one surfactant.

These compositions may also contain other types of ingredients such as, for example, protective colloids, adhesives, thickeners, thixotropic agents, penetrating agents, stabilizers, sequestrants, pigments, dyes, polymers.

In general, the compositions according to the present invention can be combined with all solid or liquid additives used in common main formulation techniques, for the application of seed treatment.

In this regard, it should be noted that in the vocabulary of those skilled in the art, the term seed treatment refers, in fact, mainly to the treatment of

grains. · - - i v £ - . . *, Γ r- · »ίΤ _; - ·· .Χ ·? ^ · Vçr. —.R · ': · * r. ι · ._, .-; ϊτγ; _ ·· ,, • '''Άντ * “* x fe-” ^- v V * -v. j. -t g > 5 -Λ * · - u · * · ^v * (4 ^- ¾. - jr r <- * - · ··> -. ϊί, / Λ »» -. · j. · *>, r - _v -L. í «-u · ~ - '*' 1 J = - '

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The application techniques are well known to those skilled in the art and can be used without inconvenience in the context of the present invention.

One can mention, for example, the coating with a film or the covering with a protective layer. In the present invention, the latter technique is preferred due to its simplicity: it is sufficient to agitate or mix the seed to be treated with the antifungal compositions according to the present invention.

Among these compositions, solid or liquid compositions can be mentioned in general.

As forms of liquid compositions or intended to constitute liquid compositions at the time of application, we can mention the solutions, in particular water-soluble concentrates, emulsifiable concentrates, emulsions, concentrated suspensions, wettable powders (or spray powders) ).

Emulsifiable or soluble concentrates almost always comprise 10 Z to 80 Z of active principle and emulsions or solutions ready for application contain 0.01 Z to 20 Z of active principle.

For example, in addition to the solvent, emulsifiable concentrates can contain, when necessary, 2 Z to 20 Z

-9 suitable additives such as stabilizers, surfactants, penetrating agents, corrosion inhibitors, dyes or adhesives as mentioned above.

From these concentrates, emulsions of any desired concentration can be obtained by diluting with water, especially suitable for applications on seeds.

Γ Wettable powders (or spray powders) prepare · -. usually they contain 20 7. to 95 Z of active ingredient, and they usually contain, in addition to the solid vehicle, 0 ve »to 5 Z of a wetting agent, 3 Z to 10 7« of a wetting agent dispersant and, when necessary, 0 Z to 10 Z of one or more stabilizer (s) and / or other additives, such as pigments, dyes, penetrating agents, adhesives or anti-caking agents, etc. ...

As already stated, aqueous dispersions and emulsions, for example compositions obtained by diluting a wettable powder or an emulsifiable concentrate according to the present invention, fall within the general scope of the present invention. These emulsions can be of the water in oil or oil in water type and can have a thick consistency like that of a mayonnaise ”.

. -10According to the intended use, those skilled in the art will choose one or more of these compositions that have (in) the greatest advantage.

According to the present invention, the phosphorus derivative can only be used individually or in a mixture, mainly with fungicides or insecticides, mainly captan, tiram, aspirin or its salts or esters, salicylic acid or its salts and esters , guazatin, copper · oxyquinoleate, teflutrin, anthraquinone, metalaxyl as well as with insecticides such as imidacloprid, lindane and endosulfan or a mixture of these products.

The following examples, without limitation, illustrate the present invention and show how it can be applied in practice.

EXAMPLE 1

100 g of barley grains were treated with 1.5 ml of an aqueous solution of phosphorous acid. The particular concentration of the treatment solution was calculated in order to obtain, on the seed, the dose (in g / q) of products indicated in the following Table. In the case of a dose of .100 g / q the concentration of phosphorous acid in the water would be 75 g / 1.

P. -110 treatment was carried out by simple mixing-stirring, for 1 minute, in order to obtain seeds encompassing different concentrations of phosphorous acid as indicated in the above Table.

These grains were deposited in pots containing a mixture of peat and pozzolan. By sprinkling the soil, one milliliter of a Pythium mycelium nebulizer was inoculated into each vessel. Each pot contained about 20 grains of seed.

The grains germinated and, 15 days after sowing, the condition of the plants was observed in relation to the control grains not treated with phosphorous acid and to the control grains not inoculated with Pythium. All plants that germinated had two leaves. No phytotoxicity was observed in any case.

The results are as follows:

tr ¹ -f

Antifungal agent Dose in g / q Effectiveness expressed as a percentage Pythium arrhenomanes Pythium myriotylum Phosphorous acid 50 60 40 100 100 60 Monophosphite 100 75 20 sodium 200 100 70 400 100 100 800 100 100 Untreated witness 0 0 0

EXAMPLE 2

As in Example 1, barley grains were treated

- with an aqueous solution of potassium diphosphite. To obtain a dose of 240 g / q of products on the seeds, we treated

100 g of seeds with 1.5 ml of a solution containing 180 g / 1 of potassium phosphide (K ^ HPO ^)! ^"T seed treatment was made in order to apply

240 g / q of phosphite on those.

-13 The grains thus treated were sown in the field and 72 hours after sowing, the state of the culture was observed in relation to an untreated control. All of these cultures had been affected by fungal attacks by Pythium arrhenomanes.

It was observed that, in relation to the untreated plants, the plants resulting from the treatment according to the present invention, contained 2.8 times more roots, with the plants themselves being more than 24.3 Z. The dry matter weight of the roots of treated plants compared to untreated plants was over 39 7 '.

Lisbon, 23 June 19941

The © ficlal Industrial Property Agent

-

Claims (16)

CLAIMING ICATIONS 1.- Plant seeds, characterized by the fact that, on the surface or inside the grains, they contain a fungicidal effective amount of an active principle chosen from the group consisting of phosphorous acid or its salts, in the absence of triazole -2- (4-chloroObenzylidene) -5,5-dimethyl-1- [1H-1,2,4-triazol-1-ylmethyl] -1-cyclopentanol. 2. - Seeds of monocotyledonous plants, characterized by the fact that, on the surface or inside the grains, they contain a fungicidal effective amount of an active principle chosen from the group consisting of phosphorous acid or its salts, in the absence of triazol-2- (4-chlorobenzylidene) -5,5-dimethyl-1- [1H-1,2,4-triazol-1-ylmethyl] -1-cyclopentanol. s Fí 7 u A. 3. Seeds according to claim 1 or 2, characterized in that the phosphorous acid or one of its alkaline or ammonium salts is the phosphorous active ingredient. 4. Seeds according to claim 1 or 2, characterized in that the principle is chosen; phosphorous active in such a way that its ~ ”· _ V 4 ^ <5 L <A ~ solubility in water at a temperature of 20 ° C is greater than 0.1 g / 1, preferably greater than 0.5 g / 1 . 5. Seeds according to claims 1 to 4, characterized in that the phosphorous active principle is present in an amount between 1 g / q and 1 kg / q, preferably between 5 and 500 g / q. 6. Seeds according to one of claims 2 to 5, characterized in that the monocot plant is chosen from the group consisting of cereals, particularly wheat, including varieties of candial wheat and buckwheat, barley, including a early variety, rye , oats, corn and rice. 7.- Seeds according to one of claims 1 to 6, characterized by the fact that they are protected against attacks by diseases of the group consisting of: * diseases belonging to the group that includes Pythium arrhenomanes, Pythium graminicola. Pythium torulosum, Pythium vanterpoolii. Pythium myriotylum, Pythium periilum, Pythium aristosponim, Pythium aphanidermatum; fusion (suppuration) of sowing; root necrosis; -. 'Λ- .................. .................. v necrosis of vital seedling nodes. 'I. <· ’AVÇ 1 X r Λ *! ¹ The i '*' * ‘t / You I 8.- Seeds according to one of claims 1 to 7, characterized by the fact that they comprise a second active ingredient chosen from the group consisting of captan, extract, guazatin, copper oxyquinoleate, metalaxyl, as well as insecticides such as imidacloprid, lindane and endosulfan. 9.- Seeds according to one of Claims 1 to 7, characterized in that they comprise a second active ingredient chosen from the group consisting of aspirin or its salts or esters and salicylic acid or its salts or esters. 10.- Seedlings, characterized by the fact that they come from the germination of seeds according to one of claims 1 to 9. 11. - Process for the protection of seeds against fungal diseases, preferably of monocotyledonous plants, characterized by the fact that an effective amount of a phosphorous active ingredient included in the group consisting of phosphorous acid and its salts is applied to the said seeds. 12. - Antifungal compositions for the protection of seeds against fungal diseases, preferably monocotyledonous plants, characterized by the fact that they contain: * at least one active ingredient chosen from the group λ consisting of phosphorous acid or its salts; ‘‘ X7 .t ·· • Ç- .. • V * · i at least one inert vehicle acceptable in agriculture and; possibly a surfactant also acceptable in agriculture; the various constituents of these compositions being different from triazole-2- (4-chlorobenzylidene) -5,5-dimethyl-1- [1 Η-1,2,4-uiazol-1-yl-methyl] - 1-cyclopentanol. 13. Compositions according to claim 12, characterized in that they contain between 0.5 and 95% of an active principle of the phosphorous type. 14. Compositions according to claim 12 or 13, characterized in that they are liquid and, preferably, aqueous. 15.- Process for the preparation of antifungal compositions for the protection of seeds against fungal diseases, preferably of monocotyledonous plants, which can be presented in liquid form, preferably aqueous, characterized by the fact that an effective amount between 0.5 and 95% of an active principle of the phosphorous type consisting of phosphorous acid or its salts, with at least one inert vehicle acceptable in agriculture and, possibly, a surfactant also acceptable in agriculture, with the proviso that the different constituents of these- compositions are different from triazole-2- (4-chlorobenzylidene) -5,5-dimethyl-1-phl-1H-triazol-1-yl-methyl-1-cyclopentanol. λ Λ. 1¾ 16.- Process for the treatment of seeds with a view to their protection against fungal diseases, characterized by the fact that, on the surface or inside the grains, a phosphorous active principle chosen from the group consisting of phosphorous acid or its salts, absence of triazole-2- (4-chlorobenzylidene) -5,5-dimethyl-1 - [1 Η-1,2,4-triazole-1 -