WO1999015002A1 - Procede pour l'enrobage de materiel vegetal avec des matieres plastiques en polyurethane biodegradable, ainsi que son utilisation comme semences artificielles - Google Patents

Procede pour l'enrobage de materiel vegetal avec des matieres plastiques en polyurethane biodegradable, ainsi que son utilisation comme semences artificielles Download PDF

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Publication number
WO1999015002A1
WO1999015002A1 PCT/EP1998/005812 EP9805812W WO9915002A1 WO 1999015002 A1 WO1999015002 A1 WO 1999015002A1 EP 9805812 W EP9805812 W EP 9805812W WO 9915002 A1 WO9915002 A1 WO 9915002A1
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WO
WIPO (PCT)
Prior art keywords
plant material
plant
artificial seeds
polyester
methyl
Prior art date
Application number
PCT/EP1998/005812
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German (de)
English (en)
Inventor
Ina Seyffert
Jürgen STRUSCH
Christa Lechelt-Kunze
Original Assignee
Bayer Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer Aktiengesellschaft filed Critical Bayer Aktiengesellschaft
Priority to AU93482/98A priority Critical patent/AU9348298A/en
Publication of WO1999015002A1 publication Critical patent/WO1999015002A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H4/00—Plant reproduction by tissue culture techniques ; Tissue culture techniques therefor
    • A01H4/005—Methods for micropropagation; Vegetative plant propagation using cell or tissue culture techniques
    • A01H4/006—Encapsulated embryos for plant reproduction, e.g. artificial seeds
    • 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
    • A01N3/00—Preservation of plants or parts thereof, e.g. inhibiting evaporation, improvement of the appearance of leaves or protection against physical influences such as UV radiation using chemical compositions; Grafting wax

Definitions

  • the invention relates to a method for covering plant material with biodegradable plastics, each plant part being given its own cover.
  • Plant material encased in this way can e.g. can be used as artificial seeds.
  • Artificial seeds are encased, asexually reproducible parts of plants, which ideally are used like natural seeds for plant production.
  • the prerequisite for the cost-effective production of artificial seeds is
  • Plant material the development of technical, automatable processes for wrapping or coating the plant material with suitable materials.
  • the wrapping of the plant material is necessary for shaping and mechanical stabilization in order to ensure that it can be transported and stored, and that it can be dosed and handled adequately.
  • the artificial one is necessary for shaping and mechanical stabilization in order to ensure that it can be transported and stored, and that it can be dosed and handled adequately.
  • the seed coat can also serve as a depot for nutrients and crop protection agents.
  • the release / absorption of nutrients and moisture through the casing should be controllable.
  • draining processes are also known. Dripping processes are only suitable to a limited extent for encapsulating plant parts, since balls are formed which are only statistically loaded with particles / plant parts, namely none, one or more Containing particles per unit, so that a sorting process is subsequently required in order to separate the desired simply filled units from the others.
  • individually wrapped plants are commercially desirable because they enable "single-grain" sowing and subsequent manual "weeding". make redundant
  • the present invention is therefore based on the object of providing a process for the wrapping of plant material in which plant parts are wrapped with a biodegradable plastic under physiological conditions, uniform, agglomeration-free wrapping products being obtained which predominantly contain only one plant part per wrapping product
  • the invention thus relates to a process for coating plant material with biodegradable plastics, wherein a fill of plant material is continuously moved with an aqueous dispersion
  • the aqueous dispersion of the biodegradable plastic is sprayed onto the moving fill of plant particles.
  • the movement of the fill is necessary in order to prevent agglomeration of the particles due to liquid Innsbruck and to ensure uniform spraying of all particles
  • Water of the sprayed-on aqueous dispersion must be evaporated in order to obtain a solid shell made of the biodegradable plastic.
  • the movement of the bulk material from plant particles is generated by the input of mechanical energy.
  • the energy input can be done with the help of a coating drum, a rotating drum, a Agglomeration plate, a rotor agglomerator or a mixer with moving tools.
  • Drying air is added to the bed to evaporate the sprayed water.
  • the amount and temperature of drying air supplied is adapted to the amount of water to be evaporated.
  • the concentration of the dispersion should be as high as possible in order to keep the amount of water to be evaporated small.
  • the plant material can be encased directly, but it can also be encased after embedding in calcium alginate hydrospheres by this process according to the invention.
  • the plant material is suspended in an alginate solution and dropped into an ion solution (usually CaC ⁇ ) using a peristaltic pump, so that the alginate coacervates.
  • the wrapping process works at physiological temperatures (18 ° -30 ° C). It allows the step-by-step application of different polymers with which the end product "artificial seeds" is given the desired properties.
  • biodegradable, fully compostable plastics are non-toxic for plants, ensure water and gas exchange for the plants and lead to satisfactory germination rates of coated plant material.
  • the plant material can come from the following plants: plants that supply food and raw materials, e.g. Cereals (e.g. rice, corn, wheat, barley, rye, millet), potatoes, legumes (e.g. alfalfa and soybeans), rapeseed, oil palm, sugar cane, sugar beet, sisal, cotton, miscanthus and tobacco; Vegetables and aromatic plants (e.g. tomato, cabbage, lettuce, carrot, eggplant, melon, cucumber,
  • Cereals e.g. rice, corn, wheat, barley, rye, millet
  • potatoes e.g. alfalfa and soybeans
  • rapeseed e.g. rapeseed, oil palm, sugar cane, sugar beet, sisal, cotton, miscanthus and tobacco
  • Vegetables and aromatic plants e.g. tomato, cabbage, lettuce, carrot, eggplant, melon, cucumber,
  • Medicinal plants such as ginseng, deadly cherry, digitalis; Fruit (e.g. apples, pears, cherries, grapes, strawberries, citrus, mango, papaya, banana, nuts); Tea, cocoa, coffee bushes; Forest plants e.g. Conifers such as spruce, fir, pine, larch, deciduous trees e.g. Poplar, beech, oak; Ornamental plants e.g. Rose, chrysanthemum, lily, amaryllis, orchid, geranium, begonia,
  • polyester polyurethane polyureas used according to the invention are known from DE 19 517 185.
  • polyester diol of a molecular weight of 500 to 10,000 which can be calculated from the hydroxyl group content from (i) adipic acid and / or succinic acid and (ii) at least one alkane diol with 2 to 6 carbon atoms or
  • a diamine component in an amount of 2 to 50 equivalent%, based on the total amount of the groups present in components b) and c) which are reactive towards isocyanate groups, consisting of
  • n and n independently of one another represent numbers from 2 to 6,
  • R represents a monovalent hydrocarbon radical having 1 to 12 carbon atoms
  • X denotes a polyalkylene oxide chain in the molecular weight range 88 to 4000, the alkylene oxide units of which at least 40% consist of ethylene oxide units and the rest of propylene oxide units. This gives aqueous dispersions of polyester-polyurethane-polyureas
  • aqueous dispersion is also intended to encompass aqueous solutions which can be present when the concentration of hydrophilic centers in the urea group-containing polyurethanes is sufficiently high to ensure that they are water-free.
  • the dispersions are often aqueous systems , which contain both dispersed and dissolved urea-containing polyurethanes
  • the starting materials a), b), c) and, if appropriate, d) and / or if appropriate e) mentioned above are used in the proportions mentioned
  • the diisocyanate component a) preferably consists exclusively of hexamethylene diisocyanate
  • the diol component b) consists either of bl) at least one polyester diol or b2) of a mixture of at least one polyester diol bl) with up to 32, preferably up to 10% by weight of at least one alkane diol with 2 to 6 carbon atoms, optionally containing ether groups
  • Suitable polyester diols b1) are those having a molecular weight which can be calculated from the hydroxyl group content 500 to 10,000, preferably 1,000 to 2,500, based on (i) adipic acid and / or succinic acid and (ii) alkane diols with 2 to 6 carbon atoms, optionally containing ether groups, such as For example, ethylene glycol, diethylene glycol, 1,4-butanediol, neopentyl glycol and / or 1,6-hexanediol polyester diols, in the production of which only ethylene glycol and / or 1,4-butanediol were used as the diol, are particularly preferred
  • the chain extenders which may optionally be used as hydroxyl groups and which may have ether groups and contain alkane diols with 2 to 6 carbon atoms are those of the type just mentioned by way of example
  • the diamine component c) consists either of cl) of diaminosulfonates of the general formula already mentioned above or of c2) mixtures of such diaminosulfonates with ethylenediamine, which, if at all, in amounts of up to 90, preferably up to 70 equivalent%, based on the opposite Isocyanate-reactive amino groups of component c) are used.
  • the particularly preferred diaminosulfonates are the potassium or sodium salts of N- (2-aminoethyl) -2-aminoethanesulfonic acid.
  • the diamine component c) is generally used in an amount of 1 to 10, preferably 2 to 5,% by weight, based on the weight of component b).
  • the optional structural component d) is a hydrophilic, monohydric polyether alcohol of the general formula
  • R and X have the meaning already mentioned.
  • R represents an aliphatic hydrocarbon radical having 1 to 4 carbon atoms
  • X represents a polyalkylene oxide chain in the molecular weight range 500 to 4,000, in which at least 40, in particular at least 70 and particularly preferably 100% of the alkylene oxide units, ethylene oxide units and the remaining alkylene oxide units are propylene oxide units.
  • a suitable polysaccharide such as, for example, alginate
  • hydrogel balls containing plant parts which consist of a polysaccharide can preferably be produced in a preliminary stage.
  • biodegradable polysacchands or their derivatives can be used individually or in a mixture as the polysaccharide component of the hydrogel according to the invention.
  • Suitable are, for example, native and soluble starches of any provenance, amylose, amylopectin, alginic acids, alginates, carrageenan, chitin, chitosan, dextran, glycogen, guar, locust bean gum, laevan, pectin, pullulan, tamarid seed meal, xanthan and hylan, and cellulose.
  • Cellulose derivatives such as e.g. Cellulose ethers, cellulose esters and cellulose carbamates.
  • Cellulose ethers such as methyl cellulose, ethyl cellulose or benzyl cellulose with average degrees of substitution less than or equal to 2.5,
  • Methyl cellulose, hydroxyethyl cellulose or hydroxypropyl cellulose are particularly preferably used.
  • Polysaccharide derivatives, in particular cellulose derivatives with any mixtures of ether, ester and carbamate substituents, are also suitable.
  • polyurethane-polysaccharide combinations according to the invention also referred to below as “blend”, can be sterilized by autoclaving and are completely biodegradable.
  • blends have combinations of properties that are advantageous for the purpose, namely the wrapping of plant material:
  • the strength of the casing can be increased in the process by adding a salt solution.
  • the salt solution is either sprayed together with the aqueous dispersion of the biodegradable plastic or else the finished coated plant materials are stored in a salt solution for a period of time to be selected.
  • the strength and the swelling behavior of the casings can be influenced by the amount and the concentration of the salt solution as well as by the exposure time. Coacervation of the polyester polyurethane polyurea is induced by the ions of the salt solution.
  • the process allows the addition of additives such as nutrients or active ingredients and protective substances.
  • any nutrient salt mixtures and sugar can be added.
  • Nutrients are the nutrient salt and vitamin mixtures which are customary and commercially available, depending on the plant material, and also natural or synthetic phytohormones which may also be commercially available, for example from the class of auxins, cyto- kinine, gibbereline, abscisic acid, and ethylene-forming substances.
  • compounds that have effects similar to vitamins or phytohormones such as chlorocholine chloride, lipo-oligosaccharides, salicylic acid derivatives.
  • herbicidal active ingredients may also be added.
  • Protective substances are e.g. insecticides, e.g. from the classes of phosphonic acid esters, carbamates, especially imidacloprid, or e.g. fungicides from the classes of azoles, in particular triadimenol and
  • fungicides are:
  • copper preparations such as: copper hydroxide, copper naphthenate, copper oxychloride, copper sulfate, copper oxide, oxyne copper and Bordeaux mixture, Mancopper, Mancozeb, Maneb, Mepanipyrim, Mepronil, Metalaxyl, Metconazole, Methasulfocarb, Methfuroxam, Metiram, Metsobutanax Nickel dimethyldithiocarbamate, nitrothal isopropyl, Nuarimol,
  • bactericides are:
  • Bacillus thuringiensis 4-bromo-2- (4-chlorophenyl) -l- (ethoxymethyl) -5- (trifluoromethyl) -lH-pyrrole-3-carbonitrile, bendiocarb, benfuracarb, bensultap, betacyfluthrin, bifenthrin, BPMC, brofenprox , Bromophos A, Bufencarb, Buprofezin, Butocarboxin, Butylpyridaben, Cadusafos, Carbaryl, Carbofuran, Carbophenothion, Carbosulfan, Cartap,
  • Chloethocarb Chloretoxyfos, Chlorfenvinphos, Chlorfluazuron, Chlormephos, N - [(6-Chloro-3-pyridinyl) -methyl] -N'-cyano-N-methyl-ethanimidamide, Chlorpyrifos, Chloropyrifos M, Cis-Resmethrin, Clocythrin, Clofentezin, Cyanophos, Cycloprothrin, Cyfluthrin, Cyhalothrin, Cyhexatin, Cypermethrin, Cyromazin, Deltamethrin, Demeton-M, Demeton-S, Demeton-S-methyl, Diafenthiuron, Diazinon,
  • Fenamiphos Fenazaquin, Fenbutatinoxid, Fenitrothion, Fenobucarb, Fenothiocarb, Fenoxycarb, Fenpropathrin, Fenpyrad, Fenpyroximat, Fenthion, Fenvalerate, Fipronil, Fluazinam, Fluazuron, Flucycloxuron, Flucythrinat, Flufenxurophone, Flufenoxurion, Fufonxxuron, Flufenoxuron, Flufenoxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufionxuron, Fufone HCH, heptenophos, hex
  • Imidacloprid Iprobefos, Isazophos, Isofenphos, Isoprocarb, Isoxathion, Ivermectin, Lambda-cyhalothrin, Lufenuron,
  • Mecarbam Mevinphos, Mesulfenphos, Metaldehyde, Methacrifos, Methamidophos, Methidathion, Methiocarb, Methomyl, Metolcarb, Milbemectin, Monocrotophos, Moxidectin,
  • Tebufenozide Tebufenpyrad
  • Tebupirimiphos Teflubenzuron
  • Tefluthrin Temephos
  • Terbam Terbufos
  • Tetrachlorvinphos Thiafenox, Thiodicarb, Thiofanox, Thiomethonon, Thionazin, Thuringiensin, Tralathenontrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium, Tronomenhrononium
  • Chemical or biological resistance inducers which protect the plant against phytopathogenic microorganisms such as fungi, bacteria, viruses or viroids can also be used as resistance-reducing protective substances.
  • Some compounds with resistance-inducing effects provide protection against insects or nematodes.
  • classes of substances with a resistance-inducing effect are benzothiadiazoles and their derivatives, mono- and dichloroisonicotinic acids and their derivatives, dichlorisothiazoles and their derivatives, dibromothiophenecarboxylic acids and their derivatives, salicylic acid and their derivatives and probenazoles.
  • the biological resistance inducers are microorganisms, e.g. fungi, bacteria or viruses useful for the plant which protect the plant from pathogenic organisms, e.g. against harmful fungi, bacteria, viruses or nematodes.
  • organisms in the coated plant material according to the invention which, as symbionts, such as, for example, as mycorrhizal fungi, or, for example, rhizobia in connection with nitrogen fixation, support the growth of plants.
  • the germination and growth of the plants can also be improved and the plant can be protected against pathogens and pests by the formation of specific metabolic products by microorganisms, which are used in combination with the plant material.
  • Another object of the invention is also the use of the coated biological material thus obtained as an artificial seed for sowing plants (artificial seeds).
  • the biodegradability of the polyester polyurethane polyureas used according to the invention and of the mixtures with the poly saccharide derivatives according to the invention was demonstrated as described below.
  • the biodegradability of the potting materials formed from the materials according to the invention has also been shown in compost and soil. After 4 weeks at the latest, the material was completely degraded; a control test with a biologically inactive substrate showed no degradation, so that disintegration of the investment material by hydrolysis or mechanical influences can be ruled out.
  • the degradation also took place in the presence of the additives possible according to the invention, e.g. Active substances, nutrients etc.
  • the compounds to be tested are placed in a suitable box in a 2 cm high mixture of rotten compost from a composting plant, Rottegrad IV.
  • the filled boxes are incubated in succession in an incubator for 4 weeks at 60, 50 and 37 ° C. Water losses are over the
  • Weight loss determined and balanced The pH of the compost is regularly measured during the incubation. If the measured value deviates from pH 7 by more than one unit, the water loss is compensated for by 100 mM potassium phosphate pH 7.0. After each week, a batch is broken off, the materials removed, cleaned, dried to constant weight at 80 ° C. and photographed. Immediately after drying, the weight loss of the material is determined by weighing again.
  • the batch is dried completely at 105 ° C. and the water evaporated is then replaced by a 0.1% HgCi2 solution.
  • Samples for the poisoned control are placed in the HgCi2 solution before being introduced into the compost mixture and then dried.
  • the control batch is incubated in exactly the same way as the batches to be tested.
  • a substance is then called classified as degradable if after 4 weeks no more sample substance can be detected in the non-poisoned mixture, but the sample in the poisoned mixture is unchanged.
  • the polyester-polyurethane-polyurea according to DE 19 517 185 is used as the polyester-polyurethane-polyurea.
  • water-soluble, biodegradable hydroxyalkyl cellulose ethers with an average molecular weight (number average) of about 10,000 to 200,000 g / mol and a degree of substitution with respect to the ether groups of about 0.5 to 1.5 are used as hydroxyethyl cellulose or hydroxypropyl cellulose.
  • Sterile cell suspensions of carrot were in 50 ml of hormone-containing Murashige-Skoog medium (MS medium; see Murashige T., Skoog F., Physiol. Plant. L5, 473-479, 1962) at 100 revolutions per minute and 25 ° C on a shaker in the dark.
  • MS medium hormone-containing Murashige-Skoog medium
  • the cell count was usually 0.5 x 10 4 - 1 x 10 5 cells / ml.
  • the sieved, washed cells were further incubated on the shaker as indicated above; After 2, 7 and 9 days there was a change of media, the cells being centrifuged off and resuspended in hormone-free medium. After 15 days the embryoids were harvested using a sieve with a mesh size of 75 ⁇ m. The suspension contained approximately 40 torpedoes / ml and 2,700 globular heart stages / ml.
  • the embryoids were suspended in 300 ml of a 3% alginate solution in semi-concentrated MS medium with 1% sucrose, added dropwise in 200 raM CaCi2 using a peristaltic pump and coacervated for 30 min. If necessary, the alginate-encapsulated embryoids were stored in sterile water at 4 ° C. and resuspended in semi-concentrated MS medium with 1% saccharode 24 h before the coating experiments.
  • the alginate balls were coated with a 40% aqueous polyester polyurethane polyurea dispersion (PU) and with 20% PU / 1% hydroxypropyl cellulose (HPC).
  • PU aqueous polyester polyurethane polyurea dispersion
  • HPC hydroxypropyl cellulose
  • the coating tests were carried out in a coating drum (diameter:
  • the liquid for coating was sprayed onto the alginate hydrogel balls rolling off in the coating drum using a 2-component nozzle. Air was used as the atomizing gas.
  • the volume flow of liquid for coating (40% PU or 20% PU / 1% HPC dispersion) was 100 g / h in each case. In the tests, a layer thickness of approximately 0.5 mm was applied.
  • the air temperature in the tests was approximately 20 ° C. and the air volume was matched to the sprayed-on amount of liquid at 19 m 3 / h.
  • Uncoated, PU and PU / HPC coated beads were placed on semi-concentrated MS agar with 1% sucrose and incubated at 25 ° C in low-light (approx. 1000 lux).
  • Germination rate from PU / HPC was 10 - 20% and after one week at 4 ° C 20 - 30%.

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  • Life Sciences & Earth Sciences (AREA)
  • Developmental Biology & Embryology (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Cell Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Botany (AREA)
  • Plant Pathology (AREA)
  • Toxicology (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

L'invention concerne un procédé pour l'enrobage de matériel végétal avec des matières plastiques biodégradables, caractérisé en ce que l'on asperge une charge de matériel végétal, sous agitation constante, avec une dispersion aqueuse de polyester, polyuréthane et polycarbamide, de polysaccharides et/ou de dérivés polysaccharidiques, et on élimine l'eau rendue. L'invention concerne également l'utilisation du matériel végétal ainsi enrobé comme semences artificielles.
PCT/EP1998/005812 1997-09-22 1998-09-12 Procede pour l'enrobage de materiel vegetal avec des matieres plastiques en polyurethane biodegradable, ainsi que son utilisation comme semences artificielles WO1999015002A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU93482/98A AU9348298A (en) 1997-09-22 1998-09-12 Method for covering plant material with biodegradable polyurethane plasti cs and the use of the covered plant material as artificial seeds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741648A DE19741648A1 (de) 1997-09-22 1997-09-22 Verfahren zur Umhüllung von Pflanzenmaterial mit biologisch abbaubaren Polyurethan-Kunststoffen sowie dessen Verwendung als künstliches Saatgut
DE19741648.9 1997-09-22

Publications (1)

Publication Number Publication Date
WO1999015002A1 true WO1999015002A1 (fr) 1999-04-01

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PCT/EP1998/005812 WO1999015002A1 (fr) 1997-09-22 1998-09-12 Procede pour l'enrobage de materiel vegetal avec des matieres plastiques en polyurethane biodegradable, ainsi que son utilisation comme semences artificielles

Country Status (4)

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AU (1) AU9348298A (fr)
DE (1) DE19741648A1 (fr)
WO (1) WO1999015002A1 (fr)
ZA (1) ZA988615B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006100259A1 (fr) * 2005-03-23 2006-09-28 Rhodia Chimie Procede de traitement de vegetaux a l'aide d'une dispersion silicone aqueuse contenant un additif phytosanitaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112012008536B1 (pt) * 2009-10-13 2017-10-10 Bayer Cropscience Lp Method for coating felipe cotton garments, cargo coating, process for intensifying garment germination, and use of the fabrics so obtained
FR3008847B1 (fr) * 2013-07-24 2015-08-14 Jouffray Drillaud Enrobage pour semence vegetale

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107141A1 (fr) * 1982-10-12 1984-05-02 Plant Genetics, Inc. Méthode pour la propagation végétale des plantes et élément analogue à une semence naturelle exécutant la méthode
GB2194743A (en) * 1986-09-02 1988-03-16 Ceres Ets Coating seed material
WO1996035733A1 (fr) * 1995-05-11 1996-11-14 Bayer Aktiengesellschaft Corps moules biodegradables et pouvant servir de compost y compris produits plats
WO1998005197A1 (fr) * 1996-08-02 1998-02-12 Bayer Aktiengesellschaft Substance biologique incorporee dans de l'hydrogel, procede d'incorporation de ladite substance et son utilisation en tant que semence artificielle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107141A1 (fr) * 1982-10-12 1984-05-02 Plant Genetics, Inc. Méthode pour la propagation végétale des plantes et élément analogue à une semence naturelle exécutant la méthode
GB2194743A (en) * 1986-09-02 1988-03-16 Ceres Ets Coating seed material
WO1996035733A1 (fr) * 1995-05-11 1996-11-14 Bayer Aktiengesellschaft Corps moules biodegradables et pouvant servir de compost y compris produits plats
DE19517185A1 (de) * 1995-05-11 1996-11-14 Bayer Ag Biologisch abbaubare und kompostierbare Formkörper einschließlich Flächengebilden
WO1998005197A1 (fr) * 1996-08-02 1998-02-12 Bayer Aktiengesellschaft Substance biologique incorporee dans de l'hydrogel, procede d'incorporation de ladite substance et son utilisation en tant que semence artificielle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006100259A1 (fr) * 2005-03-23 2006-09-28 Rhodia Chimie Procede de traitement de vegetaux a l'aide d'une dispersion silicone aqueuse contenant un additif phytosanitaire
FR2883452A1 (fr) * 2005-03-23 2006-09-29 Rhodia Chimie Sa Procede de traitement de vegetaux a l'aide d'une dispersion silicone aqueuse contenant un additif phytosanitaire

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ZA988615B (en) 1999-03-31
DE19741648A1 (de) 1999-03-25
AU9348298A (en) 1999-04-12

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