EP2491171A1 - Spreading active agricultural agents - Google Patents

Abstract

The present invention relates to a device for spreading active agricultural agents, wherein the device can be brought to the site of action temporally and spatially separated from the production process and comprises a dispenser as well as non-water-soluble nanofibers and/or mesofibers storing active agricultural agents. The polymers of which the nanofibers or mesofibers consist are preferably biodegradable. The active agricultural agents are selected from the group consisting of fungicides, herbicides, bactericides, plant growth regulators and plant nutrients. They are preferably pheromones, kairomones, and signal substances. The invention further discloses a method for producing said device, wherein the nanoparticles and/or mesofibers storing active agents are produced by means of electrospinning. The device can be used to bring active agricultural agents to the site of action thereof temporally and spatially separated from the production process. The spreading can be done mechanically or automatically. The site is preferably a useful area from pomiculture, viticulture, horticulture or a commercial row crop. The device according to the invention is particularly suited for controlling arthropods.

Description

 Patent application

Application of agricultural active ingredients The present invention describes a device for applying agricultural active ingredients, wherein the device can be brought to the site of action temporally and spatially separated from the manufacturing process and comprises a dispenser and non-water-soluble nano- and / or mesofibers loaded with agricultural active ingredients. Furthermore, a method for producing this device is disclosed in which the loaded with active substances nano- and / or mesofibers are produced by means of electrospinning. The device can be used to bring agricultural agents to their site of action. This is preferably a usable area from fruit or viticulture, horticulture or a commercial row crop.

Description and introduction of the general field of the invention

The present invention relates to the fields of agricultural sciences, biotechnology, materials science and nanotechnology.

State of the art

In the following, "agricultural active ingredients" are understood to mean active substances which are naturally occurring or extracted using chemical processes or produced using chemical and / or microbiological processes, known for the treatment of plants or soil, such as, for example: fungicides, Bactericides, insecticides, acaricides, nematicides, helminthicides, herbicides, molluscicides, rodenticides, algicides, aphicides, larvicides, ovicides, feedingstuffs Attractants, antifeedants, kairomones, pheromones and other signaling agents for the management of arthropods, repellents, game repellents, systemic agents, plant growth regulators or plant nutrients, such as but not limited to fertilizer.

By insecticides are meant in particular substances for influencing the animals surrounding the plants. In addition to chemical or microbiologically produced substances, these substances may also contain naturally occurring active substances, such as extracts, e.g. from the neem tree or the quassia root or else such substances which i.a. affect the sexual behavior and the release of the animals surrounding the plants, such as Pheromones.

There are a number of methods for the application of active ingredients are known, with which active ingredients can be supplied to the soil or plants. These are the output of

 -1) liquid in drop form by spraying, spraying, misting, brushing and drip irrigation,

 -2) solids in the form of granules and powders as well

 -3) gaseous substances via different dispensers. Examples of 1 are the long-standing methods of application or distribution, with watering can, hand syringe, backpack sprayer, tractor, helicopter and aircraft.

Examples of 2 are not only granules and powders but also adsorbates on solid natural or artificial particles, eg. B. Corncob meal on which the Kairomon MCA was absorbed. This is described, for example, in Hummel, HE, Metealf, RL (1996). Diabrotica barberi ano D. virgifera virgifera fail to orient Towards Sticky Traps in Maize Fields Kairomones p-methoxyphenylethanol and p-methoxy-trans-cinnamaldehyde. Med. Fac. Landbouww. Univ. Gent 61 / 3b, 101 1 -1018; Hummel, HE, Hein, DF, Metealf, RL (1997). Orientation disruption of Western Com Rootworm Beetles by Air Permeation with Host Plant Kairomone Mimics. p. 36 in: 2nd FAO WCR / TCP Meetings and 4th International IWGO Workshop, Oct. 28-30, 1997, Gödöllö, Hungary, J. Kiss, ed., And Wendemann, L., HE Hummel. 2001. Diabrotica beetle orientation disruption with the plant kairomone mimic 4-methoxycinnamaldehyde in Zea mays L. Mitt. Dtsch. Ges. Gen. General. 13: 209-214. Much development work has already flowed into dispenser technology. A critical review of the status achieved until 1982 is in the monograph by Leonhardt, BA, Beroza, M. (eds.) (1982). Insect pheromone technology: chemistry and applications. ACS Symposium Series # 190. American Chemical Society, Washington DC ISBN 0-8412- 0724-0. Further examples can be found in Hummel, HE, Miller, TA, eds (1984). Techniques in Pheromone Research. Springer, New York. ISBN 0-387-90919-2. In F Trona, G Anfora, M Baldessari, V Mazzoni, E Casagrande, C Loratti, G Angeli: "Mating disruption of codling moth with a continuous adhesive tape car- rying high densities of pheromone dispensers", Bull Insectol 2009, 62, 7 -13 an endless adhesive tape is described with dispensers containing (E, E) -8,10-dodecadiene-1-ol (Codlemone®) and which can be applied by machine, for example with a modified broadleaf, in the following essays Methods for controlling the corn rootworm Diabrotica virgifera virgifera described:

 1 . He Hummel, JT Shaw, DF Hein: A promising biotechnical approach to pest management of the western com rootworm in Illinois maize fields shielded with a MCA kairomone baited trap line. Mitt. Ger. Ges. Gen. general. Ent. 2006, 15, 131-135

 2. HE Hummel, A Deuker, G Leithold: The leaf beetle Diabrotica virgifera virgifera LeConte: a merciless entomological challenge for agriculture.

 lOBC / wprs Bulletin 2009, 41, 103-1 10.

 3. HE Hummel: Diabrotica virgifera virgifera LeConte: inconspicuous leaf hives - formidable challenges to agriculture. Comm. Appl. Biol. Be. 2007, 71,

7-32.

4. HE Hummel, M. Bertossa, A. Deuker: The current status of Diabrotica virgifera virgifera in selected European countries and emerging options for its pest management. pp. 338-348. In: FELDMANN, F., ALFORD, DV & FURK, C. (eds.). Crop plant resistance to biotic and abiotic factors: current potential and future demands. Proceedings of the ^3rd International Symposium on Plant Protection and Plant Health in Europe, Berlin, Germany, 14-16 May 2009. DPG self-publishing. The procedure under 2 is commonly used to apply fertilizer.

Examples of 3 are pheromones vaporized from semi-open PTFE capillaries, e.g. B. formulated with glue, and distributed by the aircraft. This is in Brooks, TW, Doane, CC, Staten, RT (1979). Experience with the first commercial pheromone communication disruptive for suppression of an agricultural insect pest. pp 375-388. In: Chemical Ecology: Odour Communication in Animals, ed. FJ Ritter. Amsterdam: Elservier / North Holland Biomedical. ISBN 0-444-80103-0. Also to be mentioned are double-chamber dispensers of the company Hercon Laboratories Corp., York, Pennsylvania, USA for pheromones, as they were used by the company BASF AG in fruit and viticulture use. Finally, Shorey, HH, Gerber, RG 1996. Use of puffers for disrup- tion of sex pheromone communication of codling moths (Lepidoptera: Tortricidae) in walnut orchards. Environ. Entomol 25 (6): 1398-1400 described "acid-bottle" buffer systems in which compressed signaling solutions are stored and from which formulations are issued upon radio command by valves. The disadvantage of these methods is that in general the delivery of the active ingredients is not continuous, extends only for a very limited period of time, and that interfering factors such as wind and rain affect this delivery as well as the fate of the active ingredient on the target surface (e.g. Range of later or already grown plants or the surfaces of plants) have a very negative influence. As a result, in the case of a desired delivery of active ingredients over a longer period of time, a multiple application of the active substance is necessary, which is associated with increased costs. The alternative of once-only application of the entire amount of active substance entails the risk of the active substances being displaced into non-target areas and thus representing at least a financial loss for the user, if not even undesired ecological influences in non-target areas. The transport over water into the soil or in lakes, streams and rivers is a typical example. Here carrier materials or systems are advantageous, as they have been described for medicinal drugs, but also active ingredients for agriculture. These include, for example, biodegradable polymer fibers or polymer moldings loaded with agricultural agents. In all cases, the ratio of surface area to volume of the polymer fiber or of the polymer molding is very important for the adjustment of the release. This ratio is particularly favorable with nanostructured fibers and increases very much with decreasing fiber diameter. As a result of nanoproduction, there are already known in principle some suitable carriers of active substances and their production processes.

 A particularly favorable process both for gently embedding the active ingredients in the carrier and for controlling the fiber diameter down to the nanometer range is electrospinning.

Details of the process of electrospinning (also called electrospinning) are described e.g. described in D.H. Reneker, I. Chun, Nanotechn. 7, 216 (1996) or Fong, H.; Reneker, D.H. ; J. Polym. See, Part B 37 (1999), 3488 and in DE 100 23 45 69. A review of electrospinning is also provided by A Greiner, JH Wendorff: "Electrospinning: A Fascinating Method for the Preparation of Ultrathin Fibers." Angew Chem Int Ed , 46, 5670-5703.

The fiber formation takes place in the case of electrospinning by means of a high electrical voltage applied between a nozzle and a counter electrode. The material to be spun is present in the form of a melt and / or a solution and is transported through the nozzle. The electric field leads via induced charges to a deformation of the emerging from the nozzle droplet, it forms a fine stream of material, which is accelerated in the direction of the counter electrode. The material flow undergoes some physical instabilities based on electrostatic repulsion, dilutes and is finally deposited on a substrate.

The fibers are separated at a speed of several meters per second, the fibers themselves can be produced up to a length of several meters. The end result is a very fine fiber spatter on the Substrate. By adjusting the concentration of the solution, the applied field, the temperature, the use of additives and other parameters, such as additional electrodes, the viscosity, the processing temperature, etc., the achieved diameter of the fibers can be adjusted within a wide range. Fibers down to a few nanometers are available; In this case, large-area fiber arrangements can be deposited up to the square meter area on the substrate or the Zielfäche.

 Fibers of amorphous or semi-crystalline polymers, of block copolymers, of polymer alloys can be produced in this way. For example, Nanofibers of such diverse natural and synthetic polymers produced as polyamides, polycarbonate or polymethylmethacrylate, from Polynor-, from polyvinylidene fluoride, cellulose, from polylactides. It is necessary for the respective material, the exact setting of the control parameters for electrospinning. Examples are the electrode material, the electrode shape and arrangement, the presence of auxiliary electrodes and control electrodes, the viscosity of the melt or solution of the template material and their surface tension and conductivity. If these parameters are not chosen optimally, then rather droplets than fibers are deposited, the diameter is in the micrometer range or the fiber diameter varies greatly. It is important for the properties of the fibers that, during electrospinning, partial orientation of the chain molecules in the fibers occurs, as shown by electron diffraction on a fiber with a diameter of about 50 nm. The orientations obtained are of the same order of magnitude as those of commercial melt-extruded fibers. With a suitable, targeted selection of the spinning parameters, it is also possible to specifically incorporate droplets into fibers.

A major advantage of electrospinning is that water can also be used as a solvent, so that water-soluble polymers, even water-soluble biological systems can be spun. Examples are polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene oxide. Depending on the arrangement and shape of the electrodes, tissues are obtained, but also parallel strands.

Examples of nanoproduction results in this regard are: i) DE 100 23 456 A1, in which hollow fibers with an inner diameter of 10 nm to 50 μm and an outer wall composed of metal-containing inorganic compounds, polymers and / or metals are proposed, which can be produced by a first method in that one fiber obtained from a first degradable material at least one coating of at least one further material and then the first material is degraded with the proviso that the hollow fiber thus obtained has an inner diameter of 10 nm to 50 μιτι.

 The second solution proposed in the above-cited document is a method according to which a fiber of a first non-degradable material is successively coated with a second, degradable material and at least one further material and the second degradable material is degraded with the proviso that was obtained on the at least one further material, a hollow fiber having an inner diameter of 10 nm to 50 μιτι and a core of the first material is obtained. The subject matter of this document was also intended for use in the area of "controlled release" according to claim 21. ii) DE 100 40 897 A1, in which porous fibers of polymeric materials are proposed, the fibers with diameters of 20 to 4,000 nm and pores ( for example for the absorption of active ingredients) in the form of at least to the fiber core reaching and / or reaching through the fiber channels.

These fibers are according to claim 7 of the above document in that a 5 to 20 wt .-% - sol. at least one polymer is spun in an easily evaporable organic solvent or solvent mixture by electrospinning at a field of 1 to 100 kV, the resulting fiber having a diameter of 20 to 4,000 nm and pores in the form of at least fiber core reaching and / or Has fiber-extending channels. Thus, surfaces of 100 to 700 m ² / g can be realized. According to a preferred embodiment of the subject matter of this document (column 4, paragraphs [0028] and [0029], by using two polymers (one water-soluble and one water-soluble), it is also possible to produce fibers which initially have no channels, but these likewise show pores or Channels, when by the action of water, the water-soluble polymers from the You assigned pores / channels are solved. For the exact manufacturing conditions reference is made to this document.

 If the surface is structured, then z. As the wetting behavior, the solution behavior and the degradation behavior, the adsorption behavior, the ratio of surface area to volume. The concept is to specifically use a phase separation beginning during electrowetting to generate such surface structures (8-10). On the one hand, the use of a binary system polymer / solvent is recommended. In the case of volatile solvents, electrospinning results in a depletion of the solvent and thus, under certain conditions, to phase separation, to the formation of a certain phase morphology, which then finally leads to a corresponding structuring of the fibers. Remarkable is the regularity of the forming structure. This can therefore be used very well for the production of consistent, retarding carrier. The pores have an ellipsoidal cross-section, these z. B. in the direction of the fiber axis about 300 nm long and perpendicular to 50 nm to 150 nm wide. The second way (see above DE 100 40 897 A1) provides for the use of ternary systems Polymer1 / Polymer2 / solvent. In fiber production, segregation of the two polymers occurs when they are incompatible. This results in fibers with a binodal (disperse phase / matrix phase) or even a cocontinuous spinodal structure. Such composite fibers are already interesting on their own. If one selectively removes one of the two components, fibers with a specific surface structure are formed. iii) WO 2005/1 15143 A1 describes a modified electrospinning method using the field soil and / or several plants and / or plant seeds as counterelectrode, in which nanoscale and / or nanostructured polymer fibers are produced which are loaded with agricultural active ingredients.

The prior art knows the above-mentioned nanofiber dispensers which are applied by direct electrospinning in the field. The polymers and active ingredients are present in a solution, from which the nanofibers are then produced in the field. In electrospinning, the nanofibers are extracted from a solution. testifies. During this process, the solvent evaporates and enters the environment. Some polymers can only be dissolved in organic solvents (eg chloroform) and then spun. With these polymers, direct electrospinning in the field is impracticable, since release of such solvents into the environment is undesirable.

Furthermore, the prior art knows dispensers which manage without electrospinning. These include commercial dispensers such as e.g. RAK Dispenser (BASF) and Isonet Dispenser (Shin-Etsu). These dispensers are applied by hand in the respective stock. As a rule, a quantity of 500 dispensers per ha is necessary. The form of manual dispensing of the dispensers means a considerable amount of manpower.

In agricultural practice, however, it is in some cases more advantageous to produce these active ingredient-loaded polymer fibers without the aid of agricultural soil, plants or plant seeds as counterelectrode. Rather, it is desirable to be able to produce such polymers loaded with active ingredients in stock and to spend them only when needed at the site of action, for example the agricultural area.

The present invention overcomes these disadvantages of the prior art by providing novel, pre-prepared and drug-loaded dispensers.

task

The object of the invention is to provide a device for the application of agricultural active ingredients, wherein the device can be brought temporally and spatially separated from the manufacturing process at the site of action, and a method for producing this device.

Solution of the task

The object of the provision of a device for the application of agricultural active ingredients, wherein the device can be brought temporally and spatially separated from the manufacturing process to the site of action, is achieved by a device comprising a dispenser and loaded with agricultural agents, non-water-soluble nano and / or mesofibers ,

Surprisingly, it has been found that non-water-soluble nano- and / or mesofibers loaded with agricultural active ingredients can be applied to a dispenser so that they can be brought to the site of action separately in time and space from the production process.

The device according to the invention and the method for its production are explained below, wherein the invention comprises all embodiments listed below individually and in combination with one another. The term "dispenser" is understood to mean a manual, semi-automatic or automatic dispensing device for active ingredients - here: agricultural active ingredients. A carrier material is understood to be a base or base on which the nano- and / or mesofibers loaded with active ingredients are applied. Accordingly, according to the invention, the dispenser functions as a carrier material for the nano- and / or mesofibers loaded with active ingredients. Agronomically usable dispensers are known to the person skilled in the art and can be used without departing from the scope of the patent claims. The term "site of action" is understood to mean the place where the active agricultural ingredients are used, for example an agricultural area, preferably an area of fruit or viticulture, horticulture and row crops.

According to the invention, "water-stable polymer fibers" are to be understood as meaning fibers of such polymers which are substantially water-insoluble. [Polymere Unter] For the purposes of the present invention, polymers having a solubility in water of less than 0.1% by weight are especially water-insoluble polymers. Accordingly, polymers whose solubility in water is greater than or equal to 0.1% by weight are to be understood as water-soluble polymers in the meaning of the present invention the polymers are selected from poly (p-xylylene), polyvinyl halides, polyvinylidene halides, polyesters such as polyethylene terephthalates, polybutylene terephthalate, polyvinyl esters, polyethers, polyvinyl ethers, polyolefins such as polyethylene, polypropylene, poly (ethylene / propylene) (EPDM), polycarbonates, polyu - rethanes; natural polymers, eg rubber; polycarboxylic acids; polysulfonic acid sulfated polysaccharides; polylactides; polyglycosides; polyamides; Homo- and copolymers of aromatic vinyl compounds such as poly (alkyl) styrenes, polystyrenes, poly-cc-methylstyrenes; polyacrylonitriles; Poly methacrylates; Polymethacrylnitrilen; polyacrylamides; polyimides; Polyphenylenes; polysilanes; polysiloxanes; polybenzimidazoles; polybenzobisbenzazoles; Polyoxazoles; polysulfides; polyesteramides; Polyarylenvinylenen; polyether ketones; polyurethanes; polysulfones; Polyvinylsulfonen; polyvinylsulfonic; Polyvinyl sulfonic acid esters; inorganic-organic hybrid polymers such as ORMOCER®s of the Fraunhofer Society for the Advancement of Applied Research Munich; silicones; wholly aromatic copolyesters; acrylates of poly (alkyl); Poly (alkyl) methacrylates; Polyhydroxyethylmethacrylaten; polyvinyl acetates; Polyisoprene, synthetic rubbers such as chlorobutadiene rubbers, eg Neoprene® from DuPont; Nitrile butadiene rubbers, eg Buna N®; polybutadiene; polytetrafluoroethylene; modified and unmodified celluloses, homo- and Copolymers of cc-olefins, vinylsulfonic acids, maleic acids, alginates or collagens, 1, ω-dicarboxylic acids, polyols, especially Ι, ω-diols such as adipic acid. Furthermore, the polymers may be water-soluble polymers, such as, for example, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone or hydroxypropylcellulose, if fibers from these polymers are stabilized against water after the electrowinning by a further processing step. This further processing step is preferably a crosslinking. This can be carried out, for example, thermally or photochemically or by radiation, with the aid of a photoinitiator being particularly advantageous in the case of photochemical crosslinking. "Radiation-induced" refers to high-energy radiation (higher energy than the VIS range), eg to UV radiation. Crosslinking may also be effected by reaction of the water-soluble polymer with a crosslinking agent These crosslinking agents include, for example, dialdehydes, sodium hypochlorite, isocyanates, dicarboxylic acid halides and chlorinated epoxides He can apply this knowledge without departing from the scope of the patent claims.

Furthermore, the polymers may be biopolymers. According to the invention, biopolymers are to be understood as meaning polymers which are synthesized by polymerization processes from naturally occurring monomer units. In the following, some of these biopolymers are given by way of example but not exhaustively, the corresponding monomer units being given in parentheses: proteins and peptides (amino acids); Polysaccharides such as starch, cellulose, glycogen (glucose); Lipids (carboxylic acids); Polyglucosamines such as chitin and chitosan (acetylglucosamine, glucosamine); Polyhydroxyalkanoates, also referred to as PHB (hydroxyalkanoate); Cutin (C16 and C18 subunits); Suberin (glycerin and polyphenols); Lignin (coumaryl alcohol, coniferyl alcohol, sinapyl alcohol). It is known to those skilled in the art that some of these biopolymers are water-soluble. Water-soluble biopolymers used in the context of the present invention have to be used - as described for the synthetic polymers - to be stabilized by another processing step to water.

All of the abovementioned polymers can be used according to the invention individually (homopolymers) or in any desired combinations with one another (copolymers). Copolymers can be composed of two or more monomer units which form the abovementioned polymers. Furthermore, the copolymers may be random copolymers, gradient copolymers, alternating copolymers, block copolymers or graft copolymers. All of the abovementioned polymers can be used in the polymer fibers to be used according to the invention individually or in any desired combination and in any desired mixing ratio.

Optionally, composite additives such as terephthalic acid may be added to the polymers.

Examples of agricultural agents are:

Examples of fungicides:

2-aminobutane; 2-anilino-4'-methyl-6-cyclopropyl-pyrimidine; 2 ', 6'-dibromo-2-methyl-4'-trifluoromethoxy-4'-trifluoromethyl-1,3-thiazole-5-carboxanilide; 2,6-dichloro-N- (4-trifluoromethylbenzyl) benzamide; (E) -2-methoxymino-N-methyl-2- (2-phenoxyphenyl) -acetamide; 8-hydroxyquinoline sulfate; Methyl (E) -2- 2- [6- (2-cyanophenoxy) -pyrimidin-4-yloxy] -phenyl-3-methoxyacrylate; Methyl (E) -methoximino [alpha- (o-tolyloxy) -o-tolyl] -acetate; 2-Phenylphenol (OPP), Aldimorph, Ampropylfos, Anilazine, Azaconazole, Benalaxyl, Benodanil, Benomyl, Binapacryl, Biphenyl, Bitertanol, Blasticidin-S, Bromuconazole, Bupirimate, Buthiobate, Calcium Polysulfide, Captafol, Captan, Carbendazim, Carboxin, Quinomethionate (Quinomethionate ), Chloroneb, chloropicrin, chlorothalonil, chlozolinate, cufraneb, cymoxanil, cyproconazole, cyprofuram, dichlorophen, diclobutrazole, dichlorofluidide, diclomethine, dicloran, diethofencarb, difenoconazole, dimethirimol, dimethomorph, diniconazole, dinocap, diphenylamine, dipyrrithione, ditalimfos, Dithianone, Dodine, Drazoxolone, Edifenphos, Epoxyconazole, Ethirimol, Etridiazole, Fenarimol, Fenbuconazole, Fenfuram, Fenitropan, Fenpiclonil, Fenpropidin, Fenpropimorph, fentin acetate, fentin hydroxide, ferbam, ferimzone, fluazinam, fludioxonil, fluoromides, fluquinconazole, flusilazole, flusulfamide, flutolanil, flutriafol, folpet, fosetyl-aluminum, fthalide, fuberidazole, furalaxyl, furmecyclox, guazatine, hexachlorobenzene, hexaconazole, hymexazole, Imazalil, imibencanolazole, iminoctadine, Iprobenfos (IBP), iprodione, isoprothiolane, kasugamycin, copper preparations such as: copper hydroxide, copper naphthenate, copper oxychloride, copper sulfate, copper oxide, oxine-copper and Bordeaux mixture, Mancopper, Mancoceb, Maneb , Mepanipyrim, mepronil, metalaxyl, metconazole, methasulfocarb, methfuroxam, metiram, metsulfovax, myclobutanil, nickel dimethyldithiocarbamate, nitrothal-isopropyl, nuarimol, ofurace, oxadixyl, oxamocarb, oxycarboxin, pefurazoate, penconazole, pencycuron, phosphodiphene, pimaricin, piperaline, polyoxin , Probenazole, prochloraz, procymidone, propamocarb, propiconazole, propineb, pyrazophos, pyrifenox, pyrimethanil, pyroquilone, quintozene (PCNB ), Sulfur and sulfur preparations, tebuconazole, tecloftalam, technazen, tetraconazole, thiabendazole, thicyofen, thiophanate-methyl, thiram, tolclophos-methyl, tolylfluidide, triadimefon, triadimenol, triazoxide, trichlamide, tricyclazole, tridemorph, triflumizole, triforin, Triticonazole, validamycin A, vinclozoline, zineb, ziram, 8-tert-butyl-2- (N-ethyl-Nn-propyl-amino) -methyl-1,4-dioxa-spiro [4,5] decane, N - (R) - (1- (4-chlorophenyl) ethyl) -2,2-dichloro-1-ethyl-3t-methyl-1-r-cyclopropanecarboxamide (mixture of diastereomers or individual or isolated isomers), [2-methyl-1 - [[[1- (4-methylphenyl) ethyl] amino] carbonyl] propyl] carbamic acid 1-methyl ethyl ester and 1-methylcyclohexyl-1-carboxylic acid (2,3-dichloro-4-hydroxy ) anilide.

Examples of bactericides are:

Bronopol, dichlorophen, nitrapyrin, nickel dimethyldithiocarbamate, kasugamycin, octhilinone, furancarboxylic acid, oxytetracycline, probenazole, streptomycin, tecloftalam, copper sulfate and other copper preparations.

Examples of acaricides, insecticides and nematicides are:

Abamectin, Acephate, Acrinathrin, Alanycarb, Aldicarb, Alphamethrin, Amitraz, Avermectin, Az 60541, Azadirachtin, Azinphos A, Azinphos M, Azocyclotin, Bacillus thuringiensis, 4-Bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) - 5- (trifluoromethyl) -1-H-pyrrole-3-carbonitriles, Bendiocarb, Benfuracarb, Bensultap, Betacyfluthrin, Bifenthrin, BPMC, Brofenprox, Bromophos A, Bufencarb, Buprofezin, Butocarboxine, Butylpyridaben, Cadusafos, Carbaryl, Carbofuran, Carbophenothione, carbosulfan, Cartap, chloethocarb, chlororetoxyfos, chlorfenvinphos, chlorofluorazuron, chloromefos, N - [(6-chloro-3-pyridinyl) -methyl] -N'-cyano-N-methyl-ethanimidamide, chlorpyrifos, chlorpyrifos M, cis-resmethrin, Clocythrin, Clofentezine, Cyanophos, Cycloprothrin, Cyfluthrin, Cyhalothrin, Cyhexatin, Cypermethrin, Cyromazine, Deltamethrin, Demeton-M, Demeton-S, Demeton-S-methyl, Diafenthiuron, Diazinone, Dichlofenthione, Dichlorvos, Dicliphos, Dicrotophos, Diethion, Diflubenzuron, dimethoate, dimethylvinphos, dioxathion, disulfonot, edifenphos, emamectin, fenvalerate, ethiofencarb, ethion, ethofenprox, ethoprophos, etrimphos, fenamiphos, fenazaquin, fenbutatinoxide, fenitrothion, fenobucarb, fenothiocarb, fenoxycarb, fenpropathrin, fenpyrad, Fenpyroximate, Fenthion, Fenvalerate, Fipronil, Fluazinam, Fluazuron, Flucycloxuron, Flucythrinat, Flufenoxuron, Flufenprox, Fiuvalinate, Fonophos, Formothion, Fosthiazat, Fubfenprox, Furathiocarb, HCH, Heptenophos, Hexaflumuron, Hexythiazox, Imidacloprid, Iprobenfos, Isazophos, Isofenphos, Isoprocarb, Isoxathion, Ivermectin, Lambda-cyhalothrin, Lufenuron, Malathion, Mecarbam, Mevinphos, Mesulfenphos, Metaldehyde, Methacrifos, Methamidophos, Methidathion, Methiocarb, Methomyl, Metolcarb, Milmectin, Monocrotophos, Moxidectin, Naled, NC 184, Nitenpyram, Omethoate, Oxamyl, Oxydemethon M, Oxydeprofos, Parathion A, Parathion M, Permethrin, Phenthoate, Phorate, Phosalone, Phosmet, Phosphamidone, Phoxim, Pirimicarb, Pirimiphos M, Pirimiphos A, Profenophos, Promecarb, Propaphos, propoxur, prothiophos, prothoate, pymetrozine, pyrachlophos, pyridapenthione, pyresmethrin, pyrethrum, pyridaben, pyrimidifen, pyriproxifen, quinalphos, salithion, sebufos, silafluofen, sulfotep, sulprofos, tebufenozide, tebufenpyrad, tebupirimiphos, teflubenzuron, Tefluthrin, Temephos, Terbam, Terbufos, Tetrachlorvinphos, Thiophenox, Thiodicarb, Thiofanox, Thiomethone, Thionazine, Thuringiensin, Tralomethrin, Triarathen, Triazophos, Triazuron, Trichlorfon, Triflum uron, trimethacarb, vedicine, XMC, xylylcarb, zetamethrin, substituted propargylamines, as shown in DE 102 17 697, dihalopropene compounds, as shown in DE 101 55 385, pyrazolylbenzyl derivatives, as shown in DE 199 61 330, pyrazole derivatives as shown in DE 696 27 281.

Examples of herbicides:

Anilides, such as Diflufenican and propanil; Arylcarboxylic acids, such as. Dichloropicolinic acid, dicamba and picloram; Aryloxyalkanoic acids, such as. B. 2,4-D, 2,4-DB, 2,4-DP, fluroxypyr, MCPA, MCPP and triclopyr; Aryloxyphenoxyalkansäureester, such as. Diclofop-methyl, Fenoxaprop-ethyl, Fluazifop-butyl, Haloxyfop-methyl and Quizalofop-ethyl; Azinones, such as Chloridazon and norflurazon; Carbamates, such as. Chlorpropham, Desmedipham, Phenmedipham and Propham; Chloroacetanilides, such as. Alachlor, acetochlor, butachlor, metazachlor, metolachlor, pretilachlor and propachlor; Dinitroanilines, such as. Oryzalin, pendimethalin and trifluralin; Diphenyl ether, such as. Acifluorfen, bifenox, fluoroglycofen, fomesafen, halosafen, lactofen and oxyfluorfen; Urea, such as. Chlortoluron, diuron, fluometuron, isoproturon, linuron and methabenzthiazirone; Hydroxyamines, such as. Alloxydim, clethodim, cycloxydim, sethoxydim and tralkoxydim; Imidazolinones, such as Imazethapyr, imazamethabenz, imazapyr and imazaquin; Nitriles, such as. Bromoxynil, dichlobenil and loxynil; Oxyacetami- de, such as. B. mefenacet; Sulfonylureas, such as. Amidosulfuron, bensulfuron-methyl, chlorimuron-ethyl, chlorosulfuron, cinosulfuron, metsulfuron-methyl, nico- sulfurone, primisulfuron, pyrazosulfuron-ethyl, thifensulfuron-methyl, triasulfuron and tribenuron-methyl; Thiolcarbamates, such as. Butylates, cycloates, dialkylates, EPTC, esprocarb, molinates, prosulfocarb, thiobencarb and triallates; Triazines, such as. Atrazine, cyanazine, simazine, simetryne, terbutryne and terbutylazine; Triazinones, such as. Hexazinone, metamitron and metribuzin; Other, such as Aminotriazole, benfuresates, bentazones, cinmethylin, clomazone, clopyralid, difenzoquat, dithiopyr, ethofumesates, fluorochloridones, glufosinates, glyphosates, isoxabene, pyridates, quinchlorac, quinmerac, sulphosates and tridiphanes.

Examples of plant growth regulators include chlorocholine chloride and ethephone.

 By "agricultural active ingredient" is meant compositions which contain at least one of the abovementioned substances.

Examples of plant nutrients include common inorganic or organic fertilizers for the supply of plants with macro and / or micronutrients.

As additives which may be known to be present in the agricultural active ingredients according to the invention, all customary substances which can be used in such preparations are suitable. Preference is given to filling Fabrics, lubricants and lubricants known from plastics technology, plasticizers and stabilizers.

Examples of fillers are:

 Common salt, carbonates such as calcium carbonate or sodium bicarbonate, furthermore aluminum oxides, silicic acids, clays, precipitated or colloidal silica, as well as phosphates.

 Examples of lubricants and lubricants are:

Magnesium stearate, stearic acid, talc and bentonites.

 Suitable plasticizers are all substances which are usually used for this purpose in polyester amides.

 Examples which may be mentioned are esters of phosphoric acid, esters of phthalic acid, such as dimethyl phthalate and dioctyl phthalate, and esters of adipic acid, such as diisobutyl adipate, furthermore esters of azelaic acid, malic acid, citric acid, maleic acid, ricinoleic acid, myristic acid, palmitic acid, oleic acid, sebacic acid , Stearic acid and trimellitic acid, as well as complex linear polyesters, polymeric plasticizers and epoxidized soybean oils.

 Suitable stabilizers are antioxidants and substances which protect the polymers from undesirable degradation during processing.

Dyes which may be present in the novel active compounds are all dyes which are customarily used for agricultural active ingredients. The concentrations of the individual components can be varied in the agricultural active ingredients within a relatively wide range.

In addition, optional UV protection agents can be incorporated into the fibers to protect, for example, UV-unstable pheromones. Suitable protecting agents include, but are not limited to, aromatic compounds such as 2,6-di-tert-butyl-4-methylphenol or aromatic amines.

The nano- and / or mesopolymer fibers according to the invention preferably consist of biodegradable polymers.

By biodegradable is meant that a compound (here: the homo- or copolymer of which the nano- and / or mesofibers are made) is decomposed by enzymes and / or microorganisms into smaller degradation products. Degradation may take place in a sewage treatment or composting plant or on the agricultural land on which the product according to the invention is located. are applied. In the latter case, the biodegradable polymers are chosen so that they are completely degraded only after the end of the growing season. Preferably, the degradation begins shortly before the end of the growing season or at the beginning of the rest period of the plants, which are to be protected with the inventive devices against pest infestation.

In a preferred embodiment, the nano- and / or mesofibers are electrospun fibers.

In a further embodiment, the dispenser is a hail protection net.

 In a further embodiment, the agricultural active ingredient is selected from the group of pheromones, kairomones and signaling substances.

In a further embodiment, the device according to the invention is nano- and / or mesofibers loaded with pheromones and applied to a hail protection net.

The object of providing a method for producing the device according to the invention is achieved by a method comprising the following steps: a) mixing the agricultural active substance with the polymer or the polymers in a solvent or as a melt,

 b) applying the dispenser to the counter electrode of an electrospinning apparatus,

 c) deposition of the polymer-active substance mixture on the dispenser by means of the electrospinning process.

The device according to the invention for the application of agricultural active substances comprising a dispenser and non-water-soluble nano- and / or mesofibers loaded with agricultural active ingredients is prepared by applying the at least one carrier material to the counter-electrode 7 of an electro-spinning apparatus (as shown in FIG. 3) and at least the nano- and / or mesofibers loaded with the agricultural active substance are deposited thereon by means of the electrospinning process. The material to be spun rial do not necessarily touch the counterelectrode. Alternatively, the material to be spun can also be guided over the electrode surface without contact in a continuous process.

 In one embodiment, the polymer or polymers from which the nanofibers and / or mesofibers are to be prepared are dissolved in at least one solvent prior to the electrospinning in step a). By "soluble" it is meant that the polymer or polymers have a solubility of at least in each case 1% by weight in the corresponding solvent The agricultural active ingredient is likewise dissolved either in a solvent (preferably the same) and the two Solutions are then mixed together, or the active ingredient is dissolved in the solution of the polymer or polymers.

The person skilled in the art knows which polymers are soluble in which solvent or solvent mixture as defined above. He can apply this knowledge without departing from the scope of the claims.

Suitable solvents are, for example, but not exhaustive:

 - Water,

Aliphatic alcohols, for example methanol, ethanol, n-propanol, 2-propanol, n-butanol, isobutanol, tert-butanol, cyclohexanol,

 - At room temperature liquid carboxylic acids, for example formic acid, acetic acid, trifluoroacetic acid

 Amines, for example diethylamine, diisopropylamine, phenylethylamine,

polar aprotic solvents, for example acetone, acetylacetone, acetonitrile, ethyl acetate, diethylene glycol, formamide, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), dimethylacetamide, N-methylpyrrolidone (NMP), pyridine, benzyl alcohol,

 halogenated hydrocarbons, for example dichloromethane, chloroform, non-polar aliphatic solvents, for example alkanes, selected from

Hexane, heptane, octane and cycloalkanes selected from cyclopentane, cyclohexane, cycloheptane,

 nonpolar aromatic solvents, for example benzene, toluene

- ionic liquids. In a further embodiment, a polymer melt is produced in step a) and the agricultural active ingredient dissolved in this melt. This embodiment is suitable for such polymers and agricultural agents which are thermally stable enough. The skilled worker is aware of which polymers and agricultural active ingredients have the required thermal stability. He can apply this knowledge without departing from the scope of the claims. For example, pheromones are thermally stable under vacuum and with exclusion of oxygen up to about 180 ° C.

If the electrospinning of polymer solutions, the polymer content of these solutions is 1 wt .-% to 50 wt .-%, more preferably 1 wt .-% to 25 wt .-%.

In the finished, non-water-stable nano- or mesopolymer fibers loaded with active ingredients, the proportion of agricultural active ingredient is up to 50% by weight. The polymer solution to be used according to the invention can be electrospun in all manners known to the person skilled in the art, for example by extrusion of the solution under low pressure through a cannula connected to one pole of a voltage source on a counter electrode arranged at a distance from the cannula outlet. On this counter electrode is the dispenser.

Preferably, the distance between the cannula and the counterelectrode acting as a collector and the voltage between the electrodes is selected so that an electric field of preferably 0.5 to 2 kV / cm is established between the electrodes. It forms a directed onto the counter electrode material flow, which solidifies on the way to the counter electrode.

Good results are obtained, in particular, if the diameter of the cannula is 50 μm to 500 μm. In one embodiment of the method according to the invention is a

Elektrospinningvorrichtung proposed which has a voltage source that can deliver voltages between 1 and 100 kV, and a nozzle / tip / syringe electrically connected thereto. Preferably, the device comprises means for incorporation and / or mixing of the polymers, solvents and agricultural agents used.

In a further embodiment, the device according to the invention for improved control of the application process has at least one counterelectrode which is mechanically or / and electrically connected to the device and has a different electrical potential than the nozzle or tip used as the first electrode for the passage of the polymer (s).

In a further advantageous embodiment it is provided that coaxially to the first, then inner nozzle / tip / syringe, a second, then outer nozzle / tip / syringe is provided. Each of the two nozzles / tips / syringes can be connected to the supply of polymers in solution with its own or with a common reservoir. In addition, storage containers for the active ingredients may also be provided.

Preferably, the apparatus further comprises pressure means which pressurizes one or both of the intended containers to supply polymers and / or agents to the nozzle (s). The mixing or mixing of the polymers with the active ingredients can in the reservoir or on the flow path to the nozzle, such as by so formed formation of the common flow path of polymer and drug to the top of the device, that turbulence in the flow and thus a mixing of polymer and Active ingredient are observed.

 The two nozzles or tips of the device have the same electrical potential. To produce multilayer fibers, the device may have further nozzles or tips which are arranged around the respective inner.

For the success of the method according to the invention with respect to the electrospinning apparatus, only a voltage source and a so that electrically connected nozzle, tip / syringe indispensable for the passage of the polymer. Preferably, at least one storage container for the polymer and the active ingredient which is in communication with the nozzle is provided, if appropriate with mixing means.

For the improved control of the passage of the polymer-active substance mixture, a pressure device is provided which exerts a pressure on the mixture in the direction of the outlet opening of the nozzle. This pressure device can be connected for optimal control of the flow rate of the mixture with a control device, which is itself connected to a signal generator, such as flow or flow rate sensor.

 Thus, depending on the actual values of flow or flow rate in the die or die tip, or depending on the melt or mixture / solution temperatures, the continuous application of consistent nanoscale polymer fibers (with or without active ingredient) can be controlled ,

In a further embodiment, the device may comprise means for measuring and controlling or / and regulating the discharged carrier quantity (mass, volume or area of the nanoscale fibers or tubes), e.g. B. in the form of a balance or in the form of optical detection means z. B. in conjunction with a flow meter (which may be designed to reduce the flow resistance in the form of an inductive flow meter). Alternatively, a flow velocity meter in conjunction with the known nozzle diameter can provide information about the amount of carrier deposited per unit of time in the form of the nanoscale fibers or tubes. These means could be used in particular for calibrating the device so as to set the correct parameters for the desired application per time or area before the application of nano- and / or mesofibres and active ingredients to the dispenser.

A further advantageous embodiment provides that an apparatus for generating the electrical potential comprises a device for generating a high voltage alternating field between the first electrode (nozzle of the device) and the counter electrode (or electrodes, ie the dispenser or dispensers) generated. Thus, the degree of "entanglement" with the target surface through the fibers can be increased.

 This alternating field can also be generated mechanically and preferably by one or more movable, preferably rotating nozzles in the form of hook-shaped or rod-shaped electrodes.

In a particularly preferred embodiment, the electro-spinning device has two or more nozzles arranged coaxially with one another for the exit of the polymer (s). Preferably, the outlet openings of all these nozzles are in a plane and have the same electrical potential, so that by means of these nozzles, a co-electrospinning is feasible, so that a core and an enveloping fiber can be produced.

In a further embodiment, the apparatus comprises other means for coating the nanoscale filament emerging from the first nozzle (i.e., the first electrode). These agents are preferably the known means of performing thin film deposition methods, e.g. the means of sputtering, chemical vapor deposition (CVD, MOCVD), vapor deposition techniques and pyrolysis.

The nano- and / or mesofibers or hollow fibers according to the invention have a surface area of 100 to 700 g / m ² and diameters of 10 nm to 5 μιη, preferably of 10 nm to 2 μιη and lengths of 1 μιη up to a few meters. Diameters of 10 nm to 1 μm are preferred.

The person skilled in the art knows how to adjust the fiber diameter. Thus, for example, the fiber diameter becomes greater, the more viscous, ie the more concentrated the polymer solution to be spun. The higher the flow rate of the spinning solution per unit time, the larger the diameter of the obtained electrospun fibers. Furthermore, the fiber diameter depends on the surface tension and the conductivity of the spinning solution. This is known to the person skilled in the art and he can apply this knowledge without departing from the scope of the patent claims. Optionally, it may be hollow fibers. Hollow fibers can be produced by first producing a massive fiber from a degradable polymer. Subsequently, this fiber is coated with a second, non-degradable material. Optionally, multiple layers of the same or different non-degradable materials can be applied. Subsequently, the first, massive fiber is removed, eg thermally, by means of irradiation or with a solvent. What remains is a hollow fiber whose inner wall consists of the second, non-degradable material and whose outer wall consists of the last non-degradable material. It is readily apparent that hollow fibers are only used in the context of the present invention if the agricultural active substance to be used is neither destroyed nor removed during the production process of these hollow fibers.

The device according to the invention can be used to bring agricultural agents temporally and spatially separated from the production of this device to its site of action. This is preferably a usable area from fruit or viticulture, horticulture or a commercial row crop.

The application can be done manually or mechanized. If necessary, the devices of the invention may be attached to or between the plants. Methods of attachment of carriers of agricultural agents are known in the art. Thus, the application and the attachment of the devices according to the invention, for example, by means of a modified Laubhefters take place, as is common in viticulture. According to the nano and / or Mesofasern distributed with the carrier material to the vines or fruit trees and attached instead of stapling the foliage. Alternatively, the dispensers loaded according to the invention with nano- and / or mesofibres and agricultural active ingredients could be wound onto a roll virtually "infinitely" and then unwound along an entire fruit tree or vine line. The devices according to the invention are particularly preferably used for regulating arthropods, for example in fruit growing or viticulture, in horticulture and in row crops. The row crops include, for example, cotton, corn and rice, and preferably almonds, nuts and pistachios.

Pheromones, kairomones or signaling substances are applied in the field depending on the pathogen considered. This has the consequence that the male pests can no longer be oriented towards the female and consequently no mating takes place. There are no fertilized eggs laid down and thus there is a reduction of the pest population. This mating disruption works so effectively that it replaces insecticide applications that are usually directed against the larvae, and pheromones and kairomones and signaling compounds are natural products of which no harmful side effects are known to humans or the environment In addition, no resistance phenomena are to be expected, as they often occur in the case of chemical-synthetic pesticides, so the confusion process with these active substances is a very environmentally friendly method of plant protection.

embodiments

Exemplary embodiment:

 Cage experiments to determine the suitability of polymer fleeces as pheromone dispensers in viticulture

The cage test is a standard procedure for testing substances that are to be applied extensively in viticulture for mating disorder. In the means to be tested is determined in this way, whether the presented formulation shows a biological effect.

Versuchsbedinqunqen

 The test was carried out in vineyards with local varieties. Depending on the indication to be tested, the test organisms used were:

 • Eupoecilia ambiguella (Affiliated grape wrapper)

 • Lobesia botrana (crossed grape moth)

The biological effectiveness test was carried out exclusively in the field. For the trial areas vineyards are planned, in which experience has to be expected infestation.

attempt principle

A defined number of male curlers were lured by a natural source of pheromone (unbegatted females). The females are placed in small sieve cages so above a Leimboden that males, which have found the females successfully, are caught on the Leimboden. If a pheromone preparation is applied around the cage, the males should no longer be able to approach the females in a targeted manner.

The smaller the number of trapped males in a cage within a pheromone confusion area, the better the mating disorder works (compared to cage in an undistorted area as a control). Pilot plant type of cage

 • The flight cages are made of metal mesh.

· The mesh size allows a free draft, but prevents that

 Fly through the winder.

• The cage size is approx. 5 m ³ .

 • The cage is installed over a vine line.

 • There are two traps in the cage, each containing two live ungrafted females as baits. The traps are equipped with an adhesive floor to hold all the males who have successfully found the attracting females.

Release and rating

· For each variant (polymer fleece, control, if necessary comparison means) a cage is set up.

• Around the cage of the test variant, polymer fleeces are spread over an area of 0.2 ha (= 2,000 m ² ). This area is usually populated with 100 conventional dispensers (RAK or Isonet).

· In each cage, two traps are hanged, each with two live, unbegatted females and exposed 40 lab-grown male males per cage and released.

 • Three to seven days after release (depending on weather conditions), the number of animals caught on the sticky floors is noted.

· Then the females are exchanged in the bait traps and the new release of 40 male grape moths.

 • Three to seven days after the second release, the number of animals caught on the adhesive floors is again noted.

 • Usually a third release followed by a check.

· The return rate is calculated in comparison to the control variant (see below). The animals used in trial and control were of equal origin and age. The location for the control cage is chosen so that there is no influence from artificial pheromone sources.

Meteorological data

 Continuous weather records of the nearest weather station during the experimental phase were made and are available for the interpretation of the test results.

Determination of the return rate for cage experiments

The number of males adhering to the glue tray / adhesive base of the female trap serves as a return. The return quota Q is the percentage of the number of male males actually used which makes it possible to compare different trials and test substances. At Q = 100% a test substance does not differ from the control. The lower Q is, the better the mating disorder works. Q = R / Rk ^* 100 [%]

Q = return rate, R = return in test variant, Rk = return in control

Result of the cage trial in the field 1. Try, 1. repeat

Ecoflex® nanofibers with grape wrap pheromone as a dispenser; amount applied to 2,000 m ² Trial area: 200 g pheromone nanofibers of 33%, spun on a hail protection net before application; Distribution of 100 sections (1.5 m long) of the nanofiber-spun hail protection net on the 2,000 m ² trial area around the cage. 1 . Try, 2nd repetition

 The second repetition was done as well as the first one.

The results of both repetitions are shown graphically in FIGS. 1 and 2.

In the first repetition of the experiment (see also FIG. 1), a good confusion effect can be observed in the first three weeks. Only in the fourth week is no longer sufficient effectiveness to recognize. These results can be reproduced in the second repetition.

Ecoflex® is a biodegradable, random, aliphatic-aromatic copolyester based on monomers 1, 4-butanediol and adipic acid and terephthalic acid as a composite additive.

Isonet LE® is a commercial pheromone consisting of 52% (7E, 9Z) - dodecadienyl acetate and 48% (Z) -9-dodecenyl acetate.

LIST OF REFERENCE NUMBERS

1 voltage source

 2 capillary nozzle

 3 syringe

 4 spinning solution

 5 counter electrode

 6 fiber formation

 7 fiber fleece

Figure legends

Fig. 1

1 . Try, 1. Repeat:

Ecoflex® nanofibers with grape wrap pheromone as a dispenser; amount applied to 2,000 m ² Trial area: 200 g pheromone nanofibers of 33%, spun on a hail protection net before application; Distribution of 100 sections (1.5 m long) of the nanofiber-spun hail protection net on the 2,000 m ² trial area around the cage.

 The columns in the graphs each represent the rate of return of the males left in the cages. The returns in the untreated controls are set equal to 100% and the recaptures in the nanofiber variant and the variant with the standard dispenser related thereto.

Fig. 2

 1 . Trial, 2nd repetition:

The experimental conditions were selected as described under FIG. 1 and the graphic representation was carried out analogously to FIG. Repeat. Fig. 3

 3 shows a schematic representation of a device suitable for carrying out the electrospinning process according to the invention.

The device comprises a syringe 3, at the tip of which is a capillary nozzle 2. This capillary nozzle 2 is connected to a pole of a voltage source 1. The syringe 3 receives the polymer solutions 4 to be spun. Opposite the outlet of the capillary nozzle 2, a counterelectrode 5 connected to the other pole of the voltage source 1 is arranged at a distance of about 20 cm, which acts as a collector for the fibers formed.

During operation of the device, a voltage between 15 kV and 150 kV is set at the electrodes 2 and 5, and the polymer solution 4 is discharged through the capillary nozzle 2 of the syringe 3 at a low pressure. Due to the strong electric field of 0.5 to 2 kV / cm

electrostatic charging of the polymers in the solution produces a material flow directed towards the counter electrode 5, which solidifies on the way to the counterelectrode 5 with fiber formation 6, as a result of which fibers 7 with diameters in the micron and nanometer range are deposited on the counterelectrode 5.

Claims

claims

Apparatus for applying agricultural active ingredients, wherein the device can be brought temporally and spatially separated from its manufacturing process to the site of action, comprising a dispenser and loaded with agricultural agents, non-water-soluble nano and / or mesofibers.

Device according to claim 1, characterized in that the nano and / or mesofibres are electrospun nano and / or meso fibers.

Device according to one of claims 1 to 2, characterized in that the agricultural active ingredient is selected from the group phromones, kairomones and signaling substances.

Device according to one of claims 1 to 3, characterized in that it is the dispenser to a hail protection network.

Method for producing the device according to one of Claims 1 to 4, comprising the following steps:

 a) mixing the agricultural active ingredient with the polymer or polymers in a solvent or as a melt,

 b) applying the dispenser to the counter electrode of an electrospinning apparatus,

 c) deposition of the polymer-active substance mixture on the dispenser by means of the electrospinning process.

Use of devices according to one of claims 1 to 4 for application of agricultural active ingredients in usable areas of fruit and viticulture, horticulture and row crops.

7. Use according to claim 6, characterized in that agricultural agents are applied to the Arthropodenregulation.