WO2016039623A1 - Utilisation d'aldéhydes pour améliorer la croissance de plante - Google Patents

Utilisation d'aldéhydes pour améliorer la croissance de plante Download PDF

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Publication number
WO2016039623A1
WO2016039623A1 PCT/NL2015/050620 NL2015050620W WO2016039623A1 WO 2016039623 A1 WO2016039623 A1 WO 2016039623A1 NL 2015050620 W NL2015050620 W NL 2015050620W WO 2016039623 A1 WO2016039623 A1 WO 2016039623A1
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WIPO (PCT)
Prior art keywords
seed
compound
cyclic
plant
coating
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PCT/NL2015/050620
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English (en)
Inventor
Francois Casper Bernard COLLEE
Cyril Hew Thai HSOON
Lothar Ott
Rubik SOMMERHALDER
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Incotec Holding B.V.
Lonza Ag
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Application filed by Incotec Holding B.V., Lonza Ag filed Critical Incotec Holding B.V.
Publication of WO2016039623A1 publication Critical patent/WO2016039623A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
    • A01N35/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing aliphatically bound aldehyde or keto groups, or thio analogues thereof; Derivatives thereof, e.g. acetals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
    • A01N43/24—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms

Definitions

  • the invention relates to a method of improving the growth of a plant by a physiological effect on said plant, to the use of a compound, and to a composition.
  • Seed treatment can be used to improve the germination and yield of crops such as rice. Suitable treatments include priming treatments such as osmopriming and hydropriming. Priming methods are generally based on having a physiological effect on the plant. Another approach to improving yield and growth is by providing plant (micro)nutrients, typically minerals and metal containing compounds, such as zinc minerals, magnesium sulphate, and iron chelate. These (micro)nutrients can for example be provided in a seed coating. The use of (micro)nutrients typically aims at uptake of the nutrient to obtain a beneficial effect on the plant.
  • plant protection products are used to protect seeds, seedlings and/or plants from damaging influences such as weeds, plant diseases, insects, nematodes, and molluscs. Plant protection products can be phytotoxic to plants and seedlings, and do not typically have a beneficial physiological effect on the plant itself.
  • An objective of the present invention is to provide such methods, compositions and uses.
  • the present inventors surprisingly found that certain compounds have a beneficial effect on the gross yield of plants.
  • the effect is separate from and additive to the effect of reducing and/or preventing damage by pests, in particular snails and/or slugs. Therefore, without wishing to be bound by way of theory, it is believed that these compounds have a beneficial physiological effect on the plant development. This effect may be based on uptake of the compounds, or compounds derived thereof, by the seeds, seedlings and/or plants; and/or on the transportation as a systemic action of the compounds by the seeds, seedlings and/or plants.
  • the invention relates to a method of improving the growth of a plant by a physiological effect on said plant, comprising: applying a compound to seed of said plant, before, during and/or after sowing, wherein said compound comprises a cyclic oligomer of an aldehyde or cyclic polymer of an aldehyde.
  • the compound may be the active compound and/or may be a precursor to the active compound that is formed for example by hydrolysis.
  • Metaldehyde is commonly used as a pesticide against slugs, snails, and other gastropods. Typically, it is applied for protection against slugs in the form of slug pellets. Metaldehyde acts on molluscs by contact or ingestion. It has been reported that the aqueous environment inside cells of molluscs readily hydrolyses metaldehyde into acetaldehyde. An overview is given in Bieri, "The environmental profile of metaldehyde", in: G. B. J.
  • the phrase "enhancing the growth of a plant” includes the variant of increasing the gross yield of a crop, typically as mass of useful plant parts (such as grains) per field surface. It may also include improving the germination rate, the germination speed, and for cereals increasing the mass of grain (such as rice) obtained per plant and/or per seed sown.
  • a physiological effect on a plant of a compound is used to indicate an effect that is based on an interaction of that compound with the plant organism, or of compounds derived from that compound, for example degradation products, hydrolysis products, and metabolic products produced by metabolism of the plant or other organisms. The effect typically is based on uptake of the compound or such derived compounds by the plant organism.
  • pesticides may improve the growth of a plant by reducing damage by pests
  • (micro)nutrients are examples of compounds that have a physiological effect on a plant.
  • Plant physiology relates to the functioning of the plant. Some aspects of plant physiology include photosynthesis, respiration, plant hormone functions, germination, dormancy, transpiration. A physiological effect may also relate to other aspects of plant physiology.
  • seed refers in particular to the ripened ovule of gymnosperms and angiosperms, which contains an embryo surrounded by a protective cover.
  • the protective cover can comprise the seed coat (testa).
  • Some seeds comprise a pericarp or fruit coat around the seed coat.
  • this layer is closely adhered to the seed, as in cereal kernels, it is in some cases referred to as a caryopsis or an achene.
  • the term “seed” refers in particular to the ripened ovule of gymnosperms and angiosperms, which contains an embryo surrounded by a protective cover.
  • the protective cover can comprise the seed coat (testa).
  • Some seeds comprise a pericarp or fruit coat around the seed coat.
  • this layer is closely adhered to the seed, as in cereal kernels, it is in some cases referred to as a caryopsis or an achene.
  • seed includes but is not restricted to anything that can sown in agriculture to produce plants, including tubers and bulbs.
  • coating refers to broadly applying a layer of a material around a seed and includes film coating, pelleting, and encrusting. Pellets obtained with pelleting are also known as seed pills.
  • An exemplary embodiment of a film coating may add 0.1-10 % to the weight of the untreated seed, often 2-5 %.
  • An encrustment layer may for example have a mass of for example 50-200 % of the mass of an untreated seed, and a full seed pellet may increase the weight of a seed for example by 500-5000 % (5: 1 to 50: 1), such as up to 3500 % (35: 1).
  • the method of the invention is directed to improving the growth of a plant, for example by increasing the yield of a crop and/or improving plant development.
  • the method comprises applying a compound to said plant and/or to a seed thereof, before, during and/or after sowing.
  • the compound is suitably applied before harvest and/or before end of growth of the plant.
  • the improvement is based on a physiological effect of the compound on said crop plant.
  • the method preferably further comprises growing the plant, preferably such that at least part of the growth of the plant, for example the germination, occurs while the plant is exposed to the compound or compounds derived thereof.
  • Growing the plants can in principle be carried out in any suitable way, such as in a conventional way, for example in a field or in a green house.
  • the compound comprises a cyclic oligomer of an aldehyde or a cyclic polymer of an aldehyde.
  • suitable polymers and oligomers include cyclic homopolymers and copolymers and oligomers. Oligomers are for example obtained from 2-12 monomers, for example trimers, tetramers, pentamers, hexamers, heptamers and octamers, of one or more aldehyde compounds, in particular of formaldehyde and/or acetaldehyde.
  • the compound comprises a cyclic oligomer selected from the group consisting of a cyclic trimer, a cyclic tetramer, a cyclic pentamer, a cyclic hexamer, a cyclic heptamer, and a cyclic octamer. More preferably, the compound comprises a cyclic oligomer selected from a cyclic trimer and a cyclic tetramer. In practice, compositions comprising mixtures of such polymers and/or oligomers can be used. Preferably, the polymer or oligomer is of formaldehyde and/or acetaldehyde.
  • Suitable compounds include cyclic trioxymethylene (1,3,5-trioxane or metaformaldehyde), cyclic tetraoxymethylene, paraldehyde (2, 4,6-trimethyl- 1,3,5-trioxane) and metaldehyde (2,4,6,8-tetramethyl-l,3,5,7-tetraoxacyclooctan).
  • the compound comprises a cyclic oligomer selected from metaldehyde and paraldehyde.
  • the way of applying the compound to seed of the plant is not restricted in any particular way. It is advantageous that during at least some time during and/or after germination, the seeds are exposed to at least some amount of the compound and/or compounds derived thereof. For this reason, amounts of the compound (and/or compounds derived thereof) may be applied in any suitable form before sowing on the seed, and/or on the seed during sowing, and/or on seed after sowing but before germination.
  • an amount of the compound (and/or compounds derived thereof) may additionally be applied in any suitable form on the plants (including seedlings) after germination, but suitably before harvesting and/or end of the growth.
  • the method may involve any combinations of these ways of applying amounts of the compounds.
  • the method of the invention may further comprise, for example, applying formulations of the compound or compounds derived thereof to the plant and/or the place where the plants grow or will grow, such as a field or green house.
  • suitable formulations include solid and/or liquid formulations, such as solutions, suspension, sprays, emulsions, powders, particles, pellets and baits.
  • Solid formulations such as pellets and pills typically comprise an inert core, such as a killed seed, and often do not comprise a seed capable of germination within a pellet or pill.
  • Liquid formulations typically comprise a liquid carrier, such as water. Formulations may for example be applied to the place of growth (such as a field) before sowing, during sowing, between sowing and the end of germination and/or between germination and harvest of the plants.
  • At least some amount of the compound is applied to seed before or during sowing.
  • This advantageous allows for controlled dosing and effective release of the compound during germination.
  • An example of applying the compound to seed before sowing is any form of seed treatment, as is conventionally used to apply compounds such as plant protection products and (micro)nutrients to seed. Examples include coating seed, including film coating, encrustment and pelleting. Soaking and spraying the seed with (liquid) formulations of the compound are further options.
  • Another option is combining seed before sowing with solid formulations of the compound, in particular particulate formulations thereof.
  • the combined seed and solid formulation often a mixture comprising seed and solid formulation particles is prepared before sowing and the mixture can be sowed.
  • the mixture may for example be prepared in advance and packaged but may also be prepared in a seed drill.
  • At least some amount of the compound is applied to the seed before sowing, preferably by a seed treatment. Applying the compound at least in part before sowing provides as advantage that the compound can be present during germination. In this preferred method, additional amounts of the compound may be applied during sowing and/or after sowing.
  • At least some amount of the compound is applied before sowing by applying a seed coating comprising the compound to seed capable of germinating.
  • suitable seed coatings include for example film coatings, encrustments, and pelleting layers. Film coatings are preferred.
  • the coatings may provide a controlled and advantageous release profile of the compound, such as sustained release and delayed release. This allows for timing release of the compound according to the desired physiological effect on the plant, rather than on the presence of molluscs.
  • a preferred embodiment of the method comprises: providing a combination of seeds capable of germinating and a compound as defined herein such as metaldehyde, and sowing said seed.
  • said combination may comprise coated seeds wherein the coating comprises a compound as defined herein wherein the coating is preferably a film coating, encrustment layer, or pelleting layer.
  • said combination may comprise a mixture of seed capable of germinating and a particulate formulation comprising a compound as defined herein;
  • said combination may comprise a kit of parts, comprising a container comprising at least said seed capable of germinating, and a separate container comprising a formulation comprising a compound as defined herein, preferably a particulate formulation , preferably the particles comprising an inert core, preferably a killed seed, more preferably a killed seed of the same crop as the seed capable of germinating.
  • the seed is sown as said coated seeds or as said mixture of seed.
  • the sowing preferably comprises applying the seed and the formulation in a controlled ratio, more preferably in such as to ensure an effective amount of the plant growth enhancing compound per number and/or mass of seed.
  • sowing may comprise sowing a solid particulate formulation and seed together in a controlled ratio as number of formulation particles per number of seed, such as 50 seeds per particle to 5 particles per seed, preferably 1-10 seeds per particle.
  • the compound as defined herein can for example be applied in an amount of 1-50 g per kg seed, preferably per kg untreated seed without coating, for example 2-30 g or 5-20 g.
  • Particularly preferred amounts of the compound as defined herein are 4-11 g per kg untreated seed without coating, such as 4-10 g/kg or 4.5-7.5 g/kg.
  • such amount of compound is the total amount of the one or more applied compounds as defined herein.
  • the compound as defined herein can for example be applied in an amount of 50 g to 5 kg per ha per year or per growing season, for example 100 g to 1 kg, or for example in an amount of 10-200 g per ha per application.
  • a possibility is applying the compounds as defined herein in an amount of 1 ⁇ g to 1 g per seed, more preferably 1-100 mg per seed (mean amount of the compounds per seed). Without restriction, these amounts can for instance be used for metaldehyde.
  • the compounds are applied in a suitable sustained release formulation, such as a coating, for example ensuring effective release in the period of 1-10 days after sowing, or for example 2-10 days after germination (hence with delayed release). With these release patterns, good physiological effects can be obtained on growth.
  • a coating formulation is attractive because of the localised application and release on or next to the seed and/or plants, since the compounds are used for a physiological effect and preferred interaction with the plants. In contrast pellets are more dispersed. In view of the need for reducing the amounts of chemicals applied in agriculture for environmental reasons, localised application on the seeds such as with coatings is preferred. Film coatings are attractive because of the possible controlled release.
  • the plant seed is of an agricultural crop.
  • the plant and seed thereof may be of the order of Monocotyledoneae or Dicotyledoneae.
  • Suitable seed include for example seed of soybean, cotton, corn, peanut, maize, any grain crop, wheat (in particular Triticum aestivum), barley, oat, rye, triticale, mustard, in particular white mustard, sunflower, sugar beet, safflower, millet, chicory, flax, rapeseed, buckwheat, tobacco, hemp seed, alfalfa, signal grass, clover in particular red and/or white clover, sorghum, chick pea, beans, peas, vetch, lucerne, Italian ryegrass, perennial ryegrass, common vetch, oilseed rape, Lacy phacelia, oil radish, lupin, forage rape and preferably rice.
  • suitable seed include vegetable seed, ornamentals seed, herb seed, French marigold, wildflower seed, ornamental seed and grass seed and tree and bush seeds.
  • suitable vegetable seeds include asparagus, chives, celery, leek, garlic, beetroot, spinach, beet, curly kale, cauliflower, sprouting broccoli, savoy cabbage, white cabbage, red cabbage, kohlrabi, Chinese cabbage, turnip, endive, chicory, water melon, melon, cucumber, gherkin, marrow, parsley, fennel, pea, beans, radish, black salsify, eggplant, sweet corn, pop corn, carrot, onion, tomato, pepper, lettuce, snap bean, cucurbit, shallot, broccoli, and Brussels sprout, and greenhouse crops such as Liliales, for example Alstroemeria.
  • the seed is selected from the group consisting of rice seed, sunflower seed and wheat. More preferably the seed is rice seed, preferably selected from the group consisting of Oryza sativa japonica, Oryza glaberrima javanica, Oryza sativa indica, Zizania palustris, and hybrids thereof.
  • Metaldehyde is an example of a preferred compound for grain, in particular for rice and/or wheat.
  • a seed coating is applied in the form of a film coating.
  • the preferred coating composition for preparing the seed coating comprises at least the compound and one or more binders.
  • the binder typically comprises a polymer. Many suitable binders are known.
  • the binder can, for example, comprise one or more selected from the group consisting of polyvinyl acetates, polyvinyl acetate copolymers, polyvinyl alcohols, polyvinyl alcohol copolymers, polyurethane, celluloses (including ethylcelluloses and methylcelluloses, hydroxymethylcelluloses, hydroxypropylcellulose, ethylcellulose,
  • polyvinylpyrolidones dextrins, maltodextrins, polysaccharides, fats, oils, proteins, gum arabics, shellacs, vinylidene chloride, vinylidene chloride copolymers, calcium lignosulphonates, acrylic copolymers, starches, polyvinylacrylates, zeins, casein, gelatine, chitosan, pullulan, polyethylene oxide, ethylene vinylacetate, acrylimide polymers and copolymers, polyhydroxyethyl acrylate, methylacrylimide monomers,
  • waxes such as carnauba wax, paraffin wax, polyethylene wax, bees wax, and polypropylene wax can be used as a binder.
  • These binders may be used alone or in combination of two or more.
  • Preferred binders include polyvinyl acetates, polyvinyl alcohols, hydroxypropyl methyl cellulose, polysaccharides (such as starch), proteins, polyethylene glycol, and polyvinyl pyrrolidones, and styrene acrylic polymer.
  • An example of a binder comprises polyvinyl alcohol and polyurethane in a mass ratio of 1:99 to 99: 1, such as 95:5 to 30:70, for example 90: 10 to 50:50 (polyvinylalcohol:polyurethane), with the advantage of sustained release.
  • the amount of binder in the coating composition is normally in the range of 0.1-100 g per kg of the seed, preferably 0.5-50 g per kg of the seed, more preferably 1-20 g per kg of the seed. Based on the total weight of the coating composition, the amount of the binder in the coating composition can be 1 wt.% or more, preferably 10 wt.% or more, and 80 wt.% or less, preferably 60 wt.% or less.
  • the preferred coating composition further comprises one or more active ingredients (including Plant Protective Products, PPP).
  • active-ingredients are fungicidal agents, bactericidal agents, insecticidal agents, nematicidal agents, molluscidal agents and other biocides.
  • Further active ingredients include disinfectants, micro-organisms, rodent killers, weed killers (herbicides), attracting agents, repellent agents, plant growth regulators (such as gibberellic acid, auxin or cytokinin), nutrients (such as potassium nitrate, magnesium sulphate, iron chelate), plant hormones, minerals, plant extracts, acaricides or miticides,
  • the amount of active ingredient applied strongly depends on the type of active ingredient and the type of seed used. Usually, however, the amount of one or more active ingredients is in the range of 0.001-200 g per kg of the seed. The skilled person is able to determine suitable amounts of active ingredient depending on the active ingredient and the type of seed used.
  • Typical fungicidal agents include Captan
  • ProseedTM Metalaxyl (methyl-N-(2,6-dimethylphenyl)- N-(methoxyacetyl)-D,L-alaninate), Fludioxonil (4-(2,2-difluoro- l,3-benzodioxol-4-yl)-l-H-pyrrol-3-carbonitril; commercially available in a blend with mefonoxam as MaximTM XL), difenoconazole (commercially available as DividendTM 3FS), carbendazim iprodione (commercially available as RovralTM), ipconazole, mefonoxam (commercially available as ApronTM XL), tebuconazole, carboxin, thiabendazole, azoxystrobin, prochloraz, and Oxadixyl (N-(2,6-dimethylphenyl)-2-methoxy-
  • a fungicide can be included in the seed coating composition in an amount of 0.0001- 10 wt.%, based on the total weight of the coated seeds.
  • Typical bactericidal agents include streptomycin, penicillins, tetracyclines, ampicillin, and oxolinic acid.
  • Typical insecticidal agents include pyrethroids, organophosphates, caramoyloximes, pyrazoles, amidines, halogenated hydrocarbons, neonicotinoids, and carbamates and derivatives thereof.
  • Particularly suitable classes of insecticides include organophosphates, phenylpyrazoles and pyrethoids.
  • Preferred insecticides are those known as terbufos, chlorpyrifos, fipronil, chlorethoxyfos, tefluthrin, carbofuran, imidacloprid, and tebupirimfos.
  • Commercially available insecticides include imidacloprid (commercially available as GauchoTM), and clothianidin (commercially available from Bayer as
  • nematicidal agents include abamectin (commercially available from Syngenta as AvictaTM) thiodicarb
  • the preferred coating composition can comprise further components such as a wetting and dispersing additive (sometimes also referred to as pigment dispersant), a filler, a solvent, a thickener, a colourant, an anti-foaming agent, a preservative, a surfactant and an effect pigment.
  • a wetting and dispersing additive sometimes also referred to as pigment dispersant
  • a wetting and dispersing agent can aid in mixing inorganic particles in the seed coating composition.
  • Suitable wetting and dispersing additives include ionic and non-ionic products and include solutions of organo-modified polyacrylates, polyacrylates, sodium polyacrylate, polyurethane, phosphoric acid ester, star polymers, and/or modified polyethers.
  • the wetting and dispersing additive can for instance be present in the seed coating composition in an amount of 0-40 wt.%, based on the total weight of the inorganic particles.
  • Suitable thickeners include agar, carboxy methylcellulose, carrageen, chitin, fucoidan, ghatti, gum arabic, karaya, laminaran, locust bean gum, pectin, alginate, guar gum, xanthan gum and tragacanth, bentonite clays, HEUR (hydrophobically modified, ethoxylated urethane) thickeners, HASE (hydrophobically modified, alkali-swellable emulsion) thickeners and polyacrylates. Gums are generally preferred because of their low cost, availability and superior ability to enhance the physical characteristics of the resultant film.
  • colourants include dyes or pigmented pigment dispersions.
  • suitable dyes include: anthraquinone,
  • Pigment dispersions can contain pigments such as pigment red 112 (CAS No. 6535-46-2), pigment red 2 (CAS No. 6041-94-7), pigment red 48:2 (CAS No. 7023-61-2), pigment blue 15:3 (CAS No. 147-14-8), pigment green 36 (CAS No. 14302- 13-7), pigment green 7 (CAS No. 1328-53-6), pigment yellow 74 (CAS No. 6358-31-2), pigment orange 5 (CAS No. 3468-63-1), pigment violet 23 (CAS No. 6358-30- 1), pigment black 7 (CAS No.
  • the colourant may be present in the seed coating composition in an amount of 0-50 wt.%, based on the total weight of the coating composition.
  • Suitable anti foaming agents include polyethylene glycol, glycerine, mineral oil defoamers, silicone defoamers, and non silicone defoamers (such as polyethers, polyacrylates), dimethylpolysiloxanes (silicone oils), arylalkyd modified polysiloxanes, polyether siloxane copolymer containing fumed silica.
  • the anti foaming agent may be present in the seed coating composition in an amount of 0.1-0.3 wt.%, based on the total weight of the coating composition.
  • effect pigments examples include pearlescent pigment in different particle sizes. Effect pigments having a particle size of 15 ⁇ or less, or a particle size of 60 ⁇ or less are commonly used.
  • the particle size of the effect pigments is normally not more than 200 ⁇ , preferably not more than 100 ⁇ . Usually, the particle size of the effect pigment is 1 ⁇ or more.
  • Another effect pigment can be aluminium. All effect pigments are commonly used to create a nice cosmetic look on the seeds.
  • a biocide can be included in the seed coating composition in order to prolong the shelf life of the seed coating composition before being applied to a seed, such as when being stored.
  • suitable biocides include MIT (2-methyl-4-isothiazolin-3-one, CAS No. 2682-20-4) and BIT
  • the coating composition further comprises flakes of a translucent polymeric film on an inert carrier (a carrier which has no detectable, harmful consequences for the environment, in particular for the seed or the outgrowing plant in the quantities present) for providing the seeds with a light-reflecting appearance, such as described in WO-A-03/003812.
  • the translucent polymeric film comprises light-reflecting particles.
  • One or more coating layers can be applied. In case of multiple coating layers, the various layers typically comprise different active ingredients.
  • the coated seeds are dried, packaged and/or stored.
  • the seed comprises molluscidal agents other than the compounds as defined herein, in an amount that is effective against molluscs such as snails.
  • molluscidal agents include niclosamid (commercially available from Bayer as Bayluscide ® ), Cypermetrin (commercially available from Chemtura as Langis ®) , Cyazypir and Rynaxypir (available from DuPont).
  • an optional method includes preventing or reducing the exposure of the plants and/or seeds to molluscs, for example snails, by another method than applying the compounds.
  • examples of such other methods include preventing physical access of snails or other molluscs to the plants and/or seeds, or by applying another molluscidal agent.
  • the method can be carried out in a green-house, as a form of preventing (or at least reducing) physical access of molluscs (including snails and/or slugs) to the growing plants and/or seeds.
  • Suitable crops for such method include for example flowers, such as Alstroemeria flowers, and vegetable crops.
  • the invention relates to a use of the compounds as defined herein.
  • an aspect of the invention relates to a use of a compound as plant growth enhancing agent, wherein said
  • the compound comprises a cyclic oligomer of an aldehyde or a cyclic polymer of an aldehyde.
  • the use is a use of the compounds as defined herein to improve the growth of a plant by a physiological effect on said plant.
  • the use is a use as growth enhancing agent for one or more of the preferred crops, more preferably for one or more plants selected from rice, sunflower and wheat.
  • the invention relates to a composition
  • a composition comprising a carrier compound and a plant growth enhancer comprising a cyclic oligomer of an aldehyde or a cyclic polymer of an aldehyde.
  • said composition comprises plant seed capable of germinating, and preferably the amount of said plant growth enhancer is effective to induce a plant growth enhancing physiological effect on plants germinating from said seed.
  • Suitable amounts are for example 1-100 g per kg seed, such as 2-20 g per kg seed, for example for rice, sunflower and/or wheat.
  • the plant seed is preferably one of the preferred crops, preferably rice, sunflower and/or wheat.
  • the composition is in the form of a coating composition for coating plant seed comprising said plant growth enhancer and a carrier.
  • the carrier is a polymeric binder.
  • the concentration of said plant growth enhancer is 1-50 wt.% or 5-30 wt.%, based on total coating composition.
  • the coating composition has a release profile of delayed release, for example less than 5 wt.% of the compounds release (total amount applied) released in 24 hours in soil and/or on immersion in water.
  • Another possible release profile is sustained release, wherein the amount released per day, compared to the day with maximum release, is at least 10 % of that maximum release per day on the 7 th day after that day with maximum release, more preferably at least 20 %, optionally at least 10 % at the 20 th day after that day with maximum release.
  • the amount released on the 30 th day after sowing is at least 10 % of the average release per day for the first 10 days after sowing, more preferably so for the 60 th day and 120 th day after sowing.
  • the average released amount per day for the 120 th day is at least 20 % of that for the 60 th day.
  • the release formulation preferably provides effective release over 2-4 months after sowing.
  • the compound is applied to the seed surface, preferably in 0.1-20 g, more preferably 0.5-3 g, 1-5, or 2-15 g per kg of seed, even more preferably 4-12 g per kg of seed.
  • the seed may be dehusked. In particular for rice dehusking before application is advantageous for good release and application.
  • coated seeds comprising such a coating.
  • suitable types of coating include film coatings, encrustments and pelleting layers for seed pellets and pills.
  • each of such seed pills and/or pellets comprises a seed capable of germinating, preferably of the preferred crops mentioned for the method of the invention.
  • the compositions comprising coated seeds may comprise one or more coating components mentioned for the method of the invention.
  • an example composition comprises metaldehyde and seed capable of germinating.
  • Such composition may comprise film coated seed capable of germinating wherein the film coating comprises metaldehyde and a polymeric binder.
  • a further example of a suitable composition is a mixture of plants seeds capable of germinating and particles comprising an amount of the plant growth enhancer of the invention.
  • Such particles typically comprise an inert core, such as a killed seed.
  • the seeds capable of germinating in such mixture may be untreated or treated.
  • Treated seed can for example be provided with a coating, such as a film coating, comprising for example pesticides or optionally some amount of the plant growth enhancer.
  • a preferred composition is coated seed, wherein the coating is preferably a film coating comprising an aldehyde compound as defined herein and a polymeric binder.
  • the composition may comprise 2-20 g of the compound as defined herein per kg seed, such as 4-12 g/kg , preferably 4-10 g/kg, more preferably 4.5-7.5 g/kg. Hence, such amounts of the compound and seed or the corresponding concentrations for application on seed.
  • compositions can be used in the method of the invention; for example the method can comprise sowing seed in the form of such composition, preferably the mentioned treated seeds.
  • the use of the invention can also be a use of such compositions as plant growth enhancer.
  • the invention also relates to a method of preparing plant seed with improved growth properties, which may include improved germination properties, comprising combining the seeds capable of germinating with the plant growth enhancer as described herein, for example by coating with a coating composition as described.
  • a fluid coating composition can be applied to seed, according to conventional methods. After application, the coating composition can be solidified by curing and/or drying, as is customary for film coatings.
  • Rice (Oryza sativa subsp. Indica) of the variety MR263 was sown and grown as follows: untreated rice in plots 1A and 2A as control, rice sown as rice seed coated with a metaldehyde coating in plots IB and 2B.
  • the seed of plots IB and 2B were obtained from the same batch of seed coated with a coating comprising metaldehyde (technical grade). The seeds were sown at a distance is 625 seeds/m 2 .
  • the preparation of the coated seeds was as follows: the untreated seeds of plots 1A and 2 A were naked seeds and the treated seeds of plots IB and 2B were treated with metaldehyde in the dosage of 10 g/kg rice seeds. Few days before sowing the seeds were soaked for 48 hours.
  • Sunflower (Helianthus) was sown and grown as follows: untreated sunflower seed in sample 1, sunflower seed coated with a film coating containing a standard fungicide (Apron ® XL from Syngenta) in sample 7, and sunflower seed coated with the same film coating as sample 7
  • a standard fungicide Apron ® XL from Syngenta
  • Plant growth was assessed approximately 30 days following sowing by extracting 25 seedlings from the arenas while ensuring that the full plant was removed (roots and foliage). The length of each complete plant was determined.
  • Plant growth was assessed approximately 30 days following sowing by extracting 25 seedlings from the arenas while ensuring that the full plant was removed (roots and foliage). The length of each complete plant was determined.

Abstract

L'invention concerne un procédé d'amélioration de la croissance d'une plante par un effet physiologique sur ladite plante, l'utilisation d'un composé, et une composition. Le procédé d'amélioration de la croissance d'une plante par un effet physiologique sur ladite plante comprend l'application d'un composé sur la graine de ladite plante, avant, pendant et/ou après le semis, où ledit composé comprend un oligomère cyclique d'un aldéhyde ou un polymère cyclique d'un aldéhyde.
PCT/NL2015/050620 2014-09-09 2015-09-08 Utilisation d'aldéhydes pour améliorer la croissance de plante WO2016039623A1 (fr)

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WO2019123194A1 (fr) 2017-12-20 2019-06-27 Pi Industries Ltd. Anthranilamides, leur utilisation en tant qu'insecticides et leurs procédés de préparation
WO2019123195A1 (fr) 2017-12-20 2019-06-27 Pi Industries Ltd. Pyrazolopyridine-diamides, leur utilisation en tant qu'insecticide et leurs procédés de préparation
WO2019150220A1 (fr) 2018-01-30 2019-08-08 Pi Industries Ltd. Nouveaux anthranilamides, leur utilisation en tant qu'insecticides et leurs procédés de préparation
WO2020178789A1 (fr) 2019-03-07 2020-09-10 Pi Industries Ltd. Composés hétérocycliques condensés et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2020250183A1 (fr) 2019-06-13 2020-12-17 Pi Industries Ltd. Composés hétérocycliques fusionnés et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2021033141A1 (fr) 2019-08-20 2021-02-25 Pi Industries Ltd. Composés hétérocycliques fusionnés et leur utilisation en tant qu'agents de lutte contre les organismes nuisibles
WO2021038501A1 (fr) 2019-08-29 2021-03-04 Pi Industries Ltd. Composés isoxazoline et leur utilisation en tant qu'agents de lutte contre les organismes nuisibles
EP3629744A4 (fr) * 2017-05-22 2021-05-26 Hodder & Taylors Limited Traitement de semences et procédés et appareil correspondants
WO2021165834A1 (fr) 2020-02-18 2021-08-26 Pi Industries Ltd. Dérivés de 5-(3-(éthylsulfonyl)pyridin-2-yl)-pyrazolo[1,5-a]pyrimidine et composés apparentés utilisés come pesticides et insecticides pour la protection des cultures
WO2022003610A1 (fr) 2020-07-02 2022-01-06 Pi Industries Ltd. Dérivés de 2-(4,5-dihydroisoxazol-3-yl) isoindoline-5-carboxamide et composés similaires utilisés comme pesticides pour la protection des cultures
WO2022123502A1 (fr) 2020-12-11 2022-06-16 Pi Industries Ltd. Composés d'isoxazoline et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2022208370A1 (fr) 2021-03-31 2022-10-06 Pi Industries Ltd. Composés hétérocycliques condensés et leur utilisation en tant qu'agents de lutte antiparasitaire
WO2023037253A1 (fr) 2021-09-08 2023-03-16 Pi Industries Ltd Composés d'isoxazoline et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2023037249A1 (fr) 2021-09-08 2023-03-16 Pi Industries Ltd. Composés carboxamide aromatiques contenant des sulfoximines/sulfilimine et leur utilisation
WO2023084473A1 (fr) 2021-11-15 2023-05-19 Pi Industries Ltd. Composés hétéroaromatiques bicycliques et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2023218484A1 (fr) 2022-05-11 2023-11-16 Pi Industries Ltd. Composés bicycliques et leur utilisation en tant qu'agents de lutte contre les nuisibles

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3629744A4 (fr) * 2017-05-22 2021-05-26 Hodder & Taylors Limited Traitement de semences et procédés et appareil correspondants
WO2019123194A1 (fr) 2017-12-20 2019-06-27 Pi Industries Ltd. Anthranilamides, leur utilisation en tant qu'insecticides et leurs procédés de préparation
WO2019123195A1 (fr) 2017-12-20 2019-06-27 Pi Industries Ltd. Pyrazolopyridine-diamides, leur utilisation en tant qu'insecticide et leurs procédés de préparation
WO2019150220A1 (fr) 2018-01-30 2019-08-08 Pi Industries Ltd. Nouveaux anthranilamides, leur utilisation en tant qu'insecticides et leurs procédés de préparation
WO2020178789A1 (fr) 2019-03-07 2020-09-10 Pi Industries Ltd. Composés hétérocycliques condensés et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2020250183A1 (fr) 2019-06-13 2020-12-17 Pi Industries Ltd. Composés hétérocycliques fusionnés et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2021033141A1 (fr) 2019-08-20 2021-02-25 Pi Industries Ltd. Composés hétérocycliques fusionnés et leur utilisation en tant qu'agents de lutte contre les organismes nuisibles
WO2021038501A1 (fr) 2019-08-29 2021-03-04 Pi Industries Ltd. Composés isoxazoline et leur utilisation en tant qu'agents de lutte contre les organismes nuisibles
WO2021165834A1 (fr) 2020-02-18 2021-08-26 Pi Industries Ltd. Dérivés de 5-(3-(éthylsulfonyl)pyridin-2-yl)-pyrazolo[1,5-a]pyrimidine et composés apparentés utilisés come pesticides et insecticides pour la protection des cultures
WO2022003610A1 (fr) 2020-07-02 2022-01-06 Pi Industries Ltd. Dérivés de 2-(4,5-dihydroisoxazol-3-yl) isoindoline-5-carboxamide et composés similaires utilisés comme pesticides pour la protection des cultures
WO2022123502A1 (fr) 2020-12-11 2022-06-16 Pi Industries Ltd. Composés d'isoxazoline et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2022208370A1 (fr) 2021-03-31 2022-10-06 Pi Industries Ltd. Composés hétérocycliques condensés et leur utilisation en tant qu'agents de lutte antiparasitaire
WO2023037253A1 (fr) 2021-09-08 2023-03-16 Pi Industries Ltd Composés d'isoxazoline et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2023037249A1 (fr) 2021-09-08 2023-03-16 Pi Industries Ltd. Composés carboxamide aromatiques contenant des sulfoximines/sulfilimine et leur utilisation
WO2023084473A1 (fr) 2021-11-15 2023-05-19 Pi Industries Ltd. Composés hétéroaromatiques bicycliques et leur utilisation en tant qu'agents de lutte contre les nuisibles
WO2023218484A1 (fr) 2022-05-11 2023-11-16 Pi Industries Ltd. Composés bicycliques et leur utilisation en tant qu'agents de lutte contre les nuisibles

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