PatentDe  


Dokumentenidentifikation EP1227726 04.08.2005
EP-Veröffentlichungsnummer 0001227726
Titel VERFAHREN ZUR VERBESSERUNG DES PFLANZENWACHSTUMS
Anmelder Syngenta Participations AG, Basel, CH
Erfinder SENN, Robert, CH-4108 Witterswil, CH;
HOFER, Dieter, CH-4410 Liestal, CH;
THIEME, Thomas, 18184 Sagerheide, DE;
ZANG, Larry, Highpoint, US
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60021100
Vertragsstaaten AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE
Sprache des Dokument EN
EP-Anmeldetag 11.10.2000
EP-Aktenzeichen 009922766
WO-Anmeldetag 11.10.2000
PCT-Aktenzeichen PCT/EP00/10024
WO-Veröffentlichungsnummer 0001026468
WO-Veröffentlichungsdatum 19.04.2001
EP-Offenlegungsdatum 07.08.2002
EP date of grant 29.06.2005
Veröffentlichungstag im Patentblatt 04.08.2005
IPC-Hauptklasse A01N 51/00

Beschreibung[en]

The present invention relates to a method of improving the growth of plants comprising applying to the plants or the locus thereof at least one compound selected from the class of the neonicotinoids.

Certain methods of improving plant growth are described in the literature. These methods are usually based on conventional fertilizing. The biological effects of those known methods are however not entirely satisfactory in the area of agriculture. There is therefore still a need to improve the growth of the plants basically for obtaining higher crop yields, as well as the reduction of the use of fertilizers needed.

The possible influence of imidacloprid, a neonicotinoid compound, on plant growth is discussed in HortScience, 1995, 30(5), 997-999 where imidacloprid was used on muskmelons; in J Econ Entomol., 1998, 91(4), 940-949 where cantaloupes were treated with the compound; in J Econ Entomol., 1996, 89(3), 735-742 where it was used on lettuce; and in Proc 5th Russian Wheat aphid Conf., 1992, No 142, 70-73 where it was applied to wheat and barley.

The present invention provides a new method of improving the growth of a plant characterised in that a plant-growth- improving amount of at least one plant-growth-improving compound, selected from the group, consisting of thiamethoxam, clothianidin, nitenpyram, thiactoprid, acetamiprid and MTI-446, is applied to the plant or the locus thereof.

The compounds thiamethoxam, clothianidin, nitenpyram, thiacloprid, acetamiprid and MTI-446 hereinafter referred to as compounds (I) may be in the form of tautomers. Accordingly, hereinbefore and hereinafter, where appropriate the compound compounds (I) are to be understood to include corresponding tautomers, even if the latter are not specifically mentioned in each case.

The compounds (I) are capable of forming acid addition salts. Those salts are formed, for example, with strong inorganic acids, such as mineral acids, for example perchloric acid, sulfuric acid, nitric acid, nitrous acid, a phosphoric acid or a hydrohalic acid, with strong organic carboxylic acids, such as unsubstituted or substituted, for example halo-substituted, C1-C4alkanecarboxylic acids, for example acetic acid, saturated or unsaturated dicarboxylic acids, for example oxalic, malonic, succinic, maleic, fumaric or phthalic acid, hydroxycarboxylic acids, for example ascorbic, lactic, malic, tartaric or citric acid, or benzoic acid, or with organic sulfonic acids, such as unsubstituted or substituted, for example halo-substituted, C1-C4alkane- or aryl-sulfonic acids, for example methane- or p-toluene-sulfonic acid. Furthermore, compounds of formula (I) having at least one acidic group are capable of forming salts with bases. Suitable salts with bases are, for example, metal salts, such as alkali metal or alkaline earth metal salts, for example sodium, potassium or magnesium salts, or salts with ammonia or an organic amine, such as morpholine, piperidine, pyrrolidine, a mono-, di- or tri-lower alkylamine, for example ethyl-, diethyl-, triethyl- or dimethyl-propyl-amine, or a mono-, di- or tri-hydroxy-lower alkylamine, for example mono-, di- or tri-ethanolamine. In addition, corresponding internal salts may also be formed. Preference is given within the scope of the invention to agrochemically advantageous salts. In view of the close relationship between the compounds (I) in free form and in the form of their salts, any reference hereinbefore or hereinafter to the free compounds (I) or to their respective salts is to be understood as including also the corresponding salts or the free compounds (I), where appropriate and expedient. The same applies in the case of tautomers of compounds (I) and the salts thereof. The free form is generally preferred in each case.

Thiamethoxam is known for instance from EP-A-580 553;

Nitenpyram from The Pesticide Manual, 11th Ed. (1997), The British Crop Protection Council, London, page 880;

Clothianidin from EP-A-376,279;

MTI-446 from EP-A-649'845; and

Thiacloprid from EP-A-235'725.

Surprisingly, it has been found that the application of the compounds (1) to the plants or the locus thereof results in a quite unexpectedly enhanced plant growth. It has now been found, that the action of the compounds (I) goes far beyond their well-known pesticidal action. It has been shown, that the compounds of the formula (I) exhibit an action termed plant growth in the frame of the instant invention. Under the term plant growth there are understood various sorts of improvements of plants which are not connected to the control of pests with the said compound (I). For example such advantageous properties that may be mentioned are improved crop characteristics including: emergence, crop yields, protein content, more developed root system, tillering increase, increase in plant height, bigger leaf blade, less dead basal leaves, stronger tillers, greener leaf color, less fertilizers needed, less seeds needed, more productive tillers, earlier flowering, early grain maturity, less plant verse (lodging), increased shoot growth, improved plant vigor, and early germination; or any other advantages familiar to a person skilled in the art.

Especially preferred is the use of the said neonicotiniod compounds in a method for the improvement of the growth plants which are essentially free of insects and representatives of the order Acarina.

It has been shown, that compounds (I) have a good effect on the plant growth. As a rule, a good effect means at least 10% earlier emergence, crop yields, more developed root system, increase in plant height, bigger leaf blade, less fertilizers needed, less seeds needed increased shoot growth, improved plant vigor etc.

A further aspect of the invention is a method of using a compound (I) in a method for improving the growth of plants.

A further aspect of the invention is the use of a compound (I) in a method for improving the growth of plants.

Still a further aspect of the invention is a method of using a composition comprising a compound (I) in a method for improving the growth of plants.

Crops which can be improved according to the present method include cereals, such as wheat, barley, rye, oats, rice, maize and sorghum; beet, such as sugar beet and fodder beet; fruit, for example pomes, stone fruit and soft fruit, such as apples, pears, plums, peaches, almonds, cherries and berries, e.g. strawberries, raspberries and blackberries; leguminous fruits, such as beans, lentils, peas and soybeans; oil plants, such as rape, mustard, poppy, olives, sunflowers, coconut, castor oil plants, cocoa beans and groundnuts; cucurbitaceae, such as marrows, cucumbersand melons; fibre plants, such as cotton, flax, hemp and jute; citrus fruit, such as oranges, lemons, grapefruit and mandarins; vegetables, such as spinach, lettuce, asparagus, cabbages, carrots, onions, tomatoes, potatoes and paprika; lauraceae, such as avocados, cinnamon and camphor; and also tobacco, nuts, coffee, aubergines, sugar cane, tea, pepper, vines, hops, bananas, natural rubber plants and ornamentals; especially rice, beans, soybeans, rape and potatoes.

The invention accordingly relates also to compositions comprising the compounds (I) and the use of the said compositions, such as emulsifiable concentrates, suspension concentrates, directly sprayable or dilutable solutions, coatable pastes, dilute emulsions, wettable powders, soluble powders, dispersible powders, wettable powders, dusts, granules or encapsulations in polymeric substances, which comprise at least one of the compounds according to the invention, the type of formulation being chosen in accordance with the intended objectives and the prevailing circumstances.

The compounds (I) are used in those compositions in pure form, a solid the compounds (I) being used, for example, in a specific particle size, or, preferably, together with at least one of the adjuvants customary in formulation technology, such as extenders, e.g. solvents or solid carriers, or surface-active compounds (surfactants).

Suitable formulation adjuvants are, for example, solid carriers, solvents, stabilisers, slow-release adjuvants, dyes and optionally surface-active substances (surfactants). Suitable carriers and adjuvants in this case include all substances customarily used in crop protection products, especially in products for controlling snails and slugs. Suitable adjuvants, such as solvents, solid carriers, surface-active compounds, non-ionic surfactants, cationic surfactants, anionic surfactants and further adjuvants in the compositions used in accordance with the invention are, for example, the same as those described in EP-A-736 252; are fully incorporated by reference herein for their disclosure relating to useful formulation adjuvants.

The compositions usually contain from 0.1 to 99 %, especially from 0.1 to 95 %, of a compound (I) and from 1 to 99.9 %, especially from 5 to 99.9 %, of at least one solid or liquid adjuvant, it generally being possible for from 0 to 25 %, especially from 0.1 to 20 %, of the composition to be surfactants (in each case percentages are by weight). Whereas commercial products will preferably be formulated as concentrates, the end user will normally employ dilute formulations which have considerably lower concentrations of one or more compounds (I). Preferred formulations have especially the following composition (% = percent by weight): Emulsifiable concentrates active ingredient 1 to 90%, preferably 5 to 20% surface-active agent 1 to 30%, preferably 10 to 20% liquid carrier 5 to 94%, preferably 70 to 85%
Dusts active ingredient 0.1 to 10%, preferably 0.1 to 1% Solid carrier 99.9 to 90%, preferably 99.9 to 99%
Suspension concentrates active ingredient 5 to 75%, preferably 10 to 50% water 94 to 24%, preferably 88 to 30% surface-active agent 1 to 40%, preferably 2 to 30%
Wettable powders active ingredient 0.5 to 90%, preferably 1 to 80% surface-active agent 0.5 to 20%, preferably 1 to 15% solid carrier 5 to 95%, preferably 15 to 90%
Granules active ingredient 0.5 to 30%, preferably 3 to 15% solid carrier 99.5 to 70%, preferably 97 to 85%
Injection solution active ingredient 0.1 to 10%, preferably 0.5 to 5% non-ionic surfactant 0.1 to 30%, preferably 0.5 to 10% mixture of ethanol and propylene glycol 60 to 99%, preferably 85 to 90%
Injection suspension (aqueous or oily) active ingredient 0.1 to 20%, preferably 1 to 10% non-ionic surfactant 0.1 to 20%, preferably 1 to 10% water or vegetable oil 60 to 99%, preferably 85 to 90%

The compositions according to the invention are prepared in known manner: in the absence of adjuvants, for example, by grinding, sieving and/or compressing a solid compound (I), for example to a specific particle size, and, in the presence of at least one adjuvant, for example, by intimately mixing and/or grinding the compound (I) with the adjuvant(s). The invention relates also to those methods of preparing the compositions according to the invention and to the use of compounds I in the preparation of such compositions.

The invention relates also to the methods of applying the compositions of the type mentioned, such as spraying, atomising, dusting, coating, dressing, scattering or pouring, which are chosen in accordance with the intended objectives and the prevailing circumstances, and to the use of the compositions for the improvement of the plants of the type mentioned. Typical rates of concentration are from 0.1 to 1000 ppm, preferably from 0.1 to 500 ppm, of compound (I). The rates of application per hectare are generally from 1 to 2000 g of compound (I) per hectare, especially from 1 to 1000 g/ha, preferably from 5 to 600 g/ha.

A preferred method of application is application to the leaves of the plants (foliar application), the frequency and rate of application depending on the desired improvement of the crop plant in question. The compound (I) may, however, also penetrate the plants through the root system (systemic action) as a result of impregnation of the locus of the plant with a liquid formulation or by incorporation of the compound (I) in solid form, for example in the form of granules, in the locus of the plant, for example in the soil (soil application). In the case of paddy rice crops, such granules may be applied in metered amounts to the flooded rice field.

In one embodiment, commercial products will preferably be formulated as concentrates whereas the end user will normally use dilute formulations. The compositions according to the invention are also suitable for the treatment of plant propagation material, including genetically modified propagation material, e.g. seed, such as fruit, tubers or grains, or plant cuttings, The propagation material may be treated with the composition before planting, for example seed may be dressed before sowing. The compounds according to the invention may also be applied to seed grains (coating) either by impregnating the grains with a liquid formulation or by coating them with a solid formulation. The composition may also be applied to the planting site when the propagation material is being planted, for example may be applied to the seed furrow during sowing. The invention relates also to that method of treating plant propagation material and to the plant propagation material so treated.

The compounds (I) are normally applied to plant propagation material in the form of compositions, but also can be applied to the seed or to the locus of propagation thereof (such as a furrow), simultaneously or in succession, with further compounds. These further compounds can be fertilizers or micronutrient donors or other preparations that influence plant growth. They can also be selective pesticides or mixtures of several of these preparations, if desired together with further carriers, surfactants or application-promoting adjuvants customarily employed in the art of formulation.

In connection with the treatment of plant propagation material, favorable rates of application are in general 0.0005 to not more than 1 kg, in particular 0.01-0.8 kg, more particularly 0.1-0.5 kg of one or more compounds (I) per 100 kg of material to be protected. However, the application conditions depend essentially on the nature (surface area, consistency, moisture content) of the material and on its environmental factors. Accordingly, within these ranges, those skilled in the art will choose, on the basis of their general body of knowledge and, where appropriate, a few experiments, doses which are non-phytotoxic but effective for improving the plant growth.

The techniques of seed treatment application are well known to those skilled in the art, and they may be used readily in the context of the present invention. The compounds (I) can be formulated and applied as a slurry, a solid seed coating, a soak, or as a dust on the surface of the seed. There also may be mentioned, e.g., film-coating or encapsulation. The coating processes are well known in the art, and employ, for seeds, the techniques of film-coating or encapsulation, or for the other multiplication products, the techniques of immersion. Needless to say, the method of application of the compounds to the seed may be varied and the invention is intended to Include any technique which is to be used.

A preferred method of applying the mixture to the plant propagation material according to the invention consists in spraying or wetting the plant propagation material with a liquid preparation, or mixing the plant material with a solid preparation of the compounds (I).

The compounds of this invention may be formulated or mixed in the seed treater tank or combined on the seed by overcoating with other seed treating agents. The agents to be mixed with the compounds of this invention may be for the control of pests, or further modification of growth, nutrition, or for the controt of plant diseases.

Formulation Examples (% = per cent by weight)

The examples which follow are intended to illustrate and not limit the invention, "compound (I)" being understood as meaning one or several of the compounds (1). Example F1: Emulsifiable concentrates a) b) c) Compound (I) 25% 40% 50% calcium dodecylbenzenesulfonate 5% 8% 6% castor oil polyethylene glycol ether 5% - - Tributylphenol polyethylene glycol ether - 12% 4% Cyclohexanone - 15% 20% xylene mixture 65% 25% 20%

Emulsions of any desired concentration can be prepared from this concentrate by dilution with water, and can be employed in crop protection and in seed treatment applications. Example F2: Dusts a) b) Compound (I) 5% 8% Talc 95% - Kaolin - 92%

Ready-to-use dusts are obtained by mixing the compounds (I) with the carrier and grinding the mixture in a suitable mill. Such powders can be used for dry-dressing seeds. Example F3: Wettable powders a) b) c) Compound (I) 25% 50% 75% sodium lignosulfonate 5% 5% - sodium laurylsulfate 3% - 5% sodium diisobutylnaphthalenesulfonate - 6% 10% octylphenol polyethylene glycol ether - 2% - highly dispersed silicic acid 5% 10% 10% Kaolin 62% 27% -

The compound (I) is mixed thoroughly with the additives and the mixture is ground thoroughly in a suitable mill affording wettable powders which can be diluted with water to give suspensions of any desired concentration. Such slurries can be used for carrying out furrow treatments on prior to planting crops of plants and also for wet- or moist-dressing material which can be propagated, for example oil seeds or tubers of plants. Example F4: Suspoemulsions a) Compound (I) 22.5% sulfated nonylphenol (polyoxyethylene condensate) 0.1% phosphated tristyrylphenol (polyoxyethylene condensate) 4% sodium lignosulfonate (polyoxyethylene condensate) 2% NaOH (50%) 0.1% silicone defoaming agent 0.1% pigment(s) 9.5% Glycerin 20% xanthan gum 0.2% Water 41.5%

This formulation is suitable for mixtures of solid and liquid compounds of the formula (I). The solid compounds (I) are mixed thoroughly with a portion of the emulsifiers and water and the mixture is ground thoroughly in a suitable mill. Another portion of the emulsifiers and water are mixed with the liquid compounds (I). The two mixtures are combined along with any other inert ingredients (such as pigments, thickeners, etc.) that are to be used in the formulation. Such suspoemulsions can be used for carrying out in furrow treatments prior to planting crops of plants and also for wet- or moist-dressing material which can be propagated, for example oil seeds or tubers of plants.

Biological Examples (% = per cent by weight unless otherwise indicated)

The examples which follow are intended to illustrate and not limit the invention.

Example B1: Emergence

Canola seed is treated with the composition of the invention containing Thiamethoxam, at a rate of 300 g Thiamethoxam per 100 kg seed, and is seeded following procedures which correspond to conditions found in practice. Untreated seeds from the same origin are used for comparison purposes. Emergence (plants per meter) is evaluated. In the case of treated seeds, about 20% more plants per meter emerge that in the case of untreated plants.

Example B2/B3: Vigor of Rice (Orvza sativa L. cv. Nihonbare) and Eggplant (Solanum melongena L. cv. Marfa)

Plants are grown in a commercially available pathogen-free soil mixture. 2 weeks (eggplants 3 weeks) after planting seedlings are transplanted into 600 ml pots and drench treated with 10 mg Thiamethoxam in 20 ml water per pot. They were fertilised once or twice a week. Up to 10 weeks after treatment, fresh- and dry-weight of shoots and roots and numbers of leaves are determined. Protein content is measured by the method of Bradford (1976, Anal. Biochem., 72, 248-254) with BSA (bovine serum albumin) as standard: Homogenisation of leaf material in liquid N2 in a mortar. Extraction in phosphate buffer (pH 7.5, 0.1M, 2/1 vol/weight). After centrifugation supernatant is separated from pellet and stored at -20°C until protein determination. For comparison of treated and check, mg protein/g fresh weight is calculated.

Tables B2 and B3: Differences between treated plants and Check given as factors (e.g. Fresh weight of treated/ Fresh weight of check). Factors >1 indicate an enhancement of vigor of treated plants. FW: fresh weight; DW: dry weight; Protein ((mg/g treated plant)/(mg/g check)) Rice Week Size Shoot Root Protein FW DW FW DW 1 1.0 1.0 1.0 1.0 0.8 1.1 2 1.0 1.0 1.1 0.8 1.1 1.0 3 1.0 1.2 1.3 0.6 1.3 1.0 4 1.1 1.3 1.2 1.5 1.4 1.0 5 1.1 1.2 1.1 1.0 0.9 1.0 6 1.2 1.3 1.1 1.6 1.5 1.0 7 1.1 1.3 1.2 1.3 1.3 1.1 8 1.1 1.4 1.4 1.8 1.5 1.0 9 1.2 1.2 1.2 1.0 1.0 0.9 10 1.3 1.3 1.3 2.0 2.0 0.7
Eggplant Week Size Shoot Root Leaf Protein FW DW FW DW No 1 1.0 0.9 0.9 1.0 1.0 1.0 2 1.1 0.7 1.1 1.2 1.2 1.1 3 1.1 1.2 1.1 1.1 1.1 1.0 4 1.0 1.1 1.1 1.0 1.0 1.6 5 1.0 1.0 1.1 0.9 1.0 1.1 1.0 6 1.3 1.3 1.3 0.9 0.9 1.3 1.1 7 1.2 1.1 1.1 0.8 0.7 1.3 1.4 8 1.2 0.7 0.9 0.6 0.6 1.2 1.4 9 1.4 0.7 1.1 0.9 1.1 1.6 2.5 10 1.4 1.1 1.1 1.1 1.3 1.4 1.3

Since the soil used does not contain pathogens and the biological activity can be assumed as low, the effects are caused by direct growth stimulation and not by side effects of Thiamethoxam against soil organisms.

Example B4: Yield

Potato tubers are treated with the composition of the invention containing Imidacloprid, at a rate of 500 g Imidacloprid per 100 kg seed and are planted following procedures which correspond to conditions found in practice. The crop is harvested from the field at maturity. Untreated tubers from the same origin are used for comparison purposes. Crop yield is evaluated and found to be significantly higher in the case of treated potato tubers than with untreated tubers.

In summary, it is seen that this invention provides a new method for improving the plant growth. Variations may be made in proportions, procedures and materials without departing from the scope of the invention as defined by the following claims.


Anspruch[de]
  1. Verfahren zum Verbessern des Pflanzenwuchses, dadurch gekennzeichnet, dass eine den Pflanzenwuchs verbessernde Menge von mindestens einer den Pflanzenwuchs verbessernden Verbindung, ausgewählt aus der Gruppe, bestehend aus Thiamethoxam, Clothianidin, Nitenpyram, Thiacloprid, Acetamiprid und MTI-446, auf die Pflanze oder deren Standort appliziert wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung Thiamethoxam ist.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung Clothianidin ist.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung Nitenpyram ist.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung Thiacloprid ist.
  6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung Acetamiprid ist.
  7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die den Pflanzenwuchs verbessernde Verbindung MTI-446 ist.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Pflanze eine Reis-, Bohnen-, Sojabohnen-, Raps- oder Kartoffelpflanze ist.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Pflanze eine Sojabohnenpflanze ist.
  10. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Pflanze eine Maispflanze ist.
Anspruch[en]
  1. A method of improving the growth of a plant characterised in that a plant-growth-improving amount of at least one plant-growth-improving compound, selected from the group, consisting of thiamethoxam, clothianidin, nitenpyram, thiacloprid, acetamiprid and MTI-446, is applied to the plant or the locus thereof.
  2. The method to claim 1 characterised in that the plant-growth-improving compound is thiamethoxam.
  3. The method according to claim 1 characterised in that the plant-growth-improving compound is clothianidin.
  4. The method according to claim 1 characterised in that the plant-growth-improving compound is nitenpyram.
  5. The method according to claim 1 characterised in that the plant-growth-improving compound is thiactoprid.
  6. The method according to claim 1 characterised in that the plant-growth-improving compound is acetamiprid.
  7. The method according to claim 1 characterised in that the plant-growth-improving compound is MTI-446.
  8. The method according to any one of claims 1 to 7 characterised in that the plant is a rice, bean, soybean, rape or potato plant.
  9. The method according to any one of claims 1 to 8 characterised in that the plant is a soybean plant.
  10. The method according to any one of claims 1 to 7 characterised in that the plant is a maize plant.
Anspruch[fr]
  1. Procédé d'amélioration de la croissance d'une plante, caractérisé en ce qu'une quantité améliorant la croissance végétale d'au moins un composé améliorant la croissance végétale, choisi dans le groupe comprenant le thiaméthoxam, la clothianidine, le nitenpyram, le thiaclopride, l'acétamipride et le MTI-446, est appliquée à la plante ou au locus de celle-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est le thiaméthoxam.
  3. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est la clothianidine.
  4. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est le nitenpyram.
  5. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est le thiaclopride.
  6. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est l'acétamipride.
  7. Procédé selon la revendication 1, caractérisé en ce que le composé améliorant la croissance végétale est le MTI-446.
  8. Procédé selon l'une quelconque des revendications 1 à 7,caractérisé en ce que la plante est une plante de riz, de haricot, de soja, de colza ou de pomme de terre.
  9. Procédé selon l'une quelconque des revendications 1 à 8,caractérisé en ce que la plante est une plante de soja.
  10. Procédé selon l'une quelconque des revendications 1 à 7,caractérisé en ce que la plante est une plante de maïs.






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