WO2005120226A2 - Method of applying pesticides - Google Patents

Method of applying pesticides Download PDF

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Publication number
WO2005120226A2
WO2005120226A2 PCT/EP2005/006208 EP2005006208W WO2005120226A2 WO 2005120226 A2 WO2005120226 A2 WO 2005120226A2 EP 2005006208 W EP2005006208 W EP 2005006208W WO 2005120226 A2 WO2005120226 A2 WO 2005120226A2
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WO
WIPO (PCT)
Prior art keywords
pesticide
spp
seed
dose
containing particles
Prior art date
Application number
PCT/EP2005/006208
Other languages
French (fr)
Other versions
WO2005120226A3 (en
Inventor
Eric Van Der Drift
Original Assignee
Syngenta Participations Ag
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 Syngenta Participations Ag filed Critical Syngenta Participations Ag
Priority to AU2005251468A priority Critical patent/AU2005251468B2/en
Priority to JP2007526306A priority patent/JP5567253B2/en
Priority to KR1020067025951A priority patent/KR101238276B1/en
Priority to MXPA06013613A priority patent/MXPA06013613A/en
Priority to EP05759213A priority patent/EP1778009A2/en
Priority to US11/569,754 priority patent/US8347551B2/en
Priority to CA2567820A priority patent/CA2567820C/en
Priority to BRPI0510850-0A priority patent/BRPI0510850A/en
Publication of WO2005120226A2 publication Critical patent/WO2005120226A2/en
Publication of WO2005120226A3 publication Critical patent/WO2005120226A3/en

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Classifications

    • 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
    • A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • 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
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/36—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
    • A01N37/38—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system
    • A01N37/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
    • 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
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
    • 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
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
    • 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
    • A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring

Definitions

  • the present invention relates to a method of protecting a germinating seed treated with a pesticide in agriculture and horticulture.
  • Pesticides for example insecticides or fungicides are applied alone or in combinations directly onto seeds during a seed treatment prior to sowing.
  • Seed treatment is well-known in the art and comprises different methods, for example seed dressing, seed coating or seed pelleting.
  • pesticides are generally applied in relatively high doses to achieve adequate protection against the pest to be fought. It is well known in the art that, for example, high doses of some pesticides in seed treatment, when they exceed a certain threshold, can delay germination, hamper the growth vigor of the plant or induce other negative effects during germination. These effects, that occur predominantly in the seedling stage of a plant, are collectively called “phytotoxic” effects. Examples of pesticides that may cause phytotoxic effects depending on dosing, way of application, environmental conditions and similar parameters, can be found amongst the systemic insecticides, such as, for example, imidacloprid, thiamethoxam and clothianidin.
  • WO 01/13722 describes this method for pelleted lettuce seeds in combination with pellets containing the insecticide imidacloprid.
  • a further important industry in the art of the invention is that of young plant growers.
  • Young plant growers cultivate high-value plants, such as, for example lettuce, brassica, pepper, tomato and melon, in nurseries from the point in time of sowing the seed until the plant reaches the young plant stage. Typically, the young plant stage is reached between 4 and 6 weeks after sowing of the seed. Then the young plants are usually sold to a customer, who then transplants the young plants into an open-land field for further cultivation. Generally, while being in the nurseries of the young plant growers, the plants are cultivated on plant trays. Besides the already mentioned loss of pesticide-containing particles due to sowing failures, pesticide-containing particles can also be lost, for example during transport of said plant trays or during said transplanting into the open-land field.
  • the present invention recognizes the need to increase the yield of suitably pesticide- protected plants in mass-cultivations, that start already at the seed stage, without investments into the improvement of labour intensive operations, such as, for example, sowing or transplanting.
  • the plant trays used by the young plant growers contain a multitude of individual plant containers. Depending on the application, the size of said plant containers is in the range of 1 x 1 cm to 4 x 4 cm.
  • the seed and the pesticide-containing particle are placed individually into the plant containers. Therefore, due to automation with the use of sowing machines, the seed and the pesticide-containing particle can easily have a distance to each other of up to 4 cm in the individual plant containers.
  • the plants are cultivated for 4 to 6 weeks in the plant trays before they reach the young plant stage and are then transplanted into the open- land field.
  • the present invention also recognizes the need of conveying an early pesticide protection to those transplanted plants, where the seed and its corresponding pesticide-containing particle were situated in a considerable distance in the plant container.
  • the problems of increasing the yield of suitably pesticide protected plants in mass-cultivations and of conveying an early pesticide protection to transplanted plants are both overcome by the instant invention.
  • the instant invention it is suggested not to apply the Effective Dose of the pesticide, that is a dose that is sufficient to protect one seed germ, on the pesticide-containing particles, which are placed next to the seed to be protected, but to distribute the Effective
  • the invention relates to a method of protecting a germinating seed treated with a pesticide comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide- containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide. This guarantees that those plants, that did not receive or have lost their pesticide-containing particles do not remain unprotected, as the pesticide will always be present directly on the seed at a dose that is lower than or equal to the Maximal Non- Phytotoxic Dose of the pesticide.
  • a basic level of pesticide protection is conferred to all plants in a mass-cultivation without causing undesirable phytotoxic effects during germination.
  • Said basic level of pesticide protection will also be present immediately after transplanting, even with those plants, whose pesticide-containing particles were situated in a considerable distance from the seed in the plant container.
  • an early protection is conferred to those plants without causing undesirable phytotoxic effects during germination.
  • an “Effective Dose” is a dose of a pesticide in a seed treatment that is giving sufficient control of the pest under normal test conditions.
  • said sufficient control is equal to the maximal obtainable control of the pest for the pesticide under normal test conditions.
  • Said normal test conditions generally reflect the natural environment where the plants are to be grown and where the pest is to be fought.
  • "Sufficient control of the pest” represents an economically interesting pest control and is, as a rule, in a range of between 70-100% control.
  • Tests for pesticidal activity of pesticides in seed treatments are well known in the art and include, for example, tests for insecticidal, fungicidal or miticidal activities. Examples for said tests can be found in Jukes et al. (in: "Evaluation of non-organophosphorus insecticides for controlling the cabbage root fly. The insecticide conundrum", Proceedings 52nd International Symposium on Crop Protection, Gent, Belgium, 2000), Ester et al. (in: “Filmcoating the seed of cabbage (Brassica oleracea L. covar. Capitata L.) and cauliflower (Brassica oleracea L. var. Botrytis L.) with imidacloprid and spinosad to control insect pests", 2003, Crop Protection
  • the Effective Dose can range from 0.0001 to 1000 g of pesticide per kg seeds.
  • the specific value of the Effective Dose may depend on a variety of parameters such as, for example, physical and biological factors which are unique for each individual pesticide
  • a "Maximal Non-Phytotoxic Dose” is that proportion of the Effective Dose that is just sufficiently low not to cause an economically undesirable phytotoxic effect on the plant.
  • Examples for phytotoxic effects are a delay in germination, a hampering of the growth vigor of the plant and other negative effects during germination.
  • Tests for phytotoxic effects in seed treatments are well known in the art and include, for example the analysis of the germination percentage, the analysis of the germination speed, the analysis of the yield of normal developed plants and the analysis of the plant leaf area development. An example for said tests can be found in W0 01/13722.
  • an economically undesirable phytotoxic effect is seen, when the value of a beneficial parameter, such as, for example, the germination rate or the growth of the size of the plant leaf area, is diminished below 95-75% of the value of the untreated control.
  • a beneficial parameter such as, for example, the germination rate or the growth of the size of the plant leaf area
  • the economical significance of the parameter chosen for the phytotoxicity test has to be taken into account.
  • a 25% decrease of a parameter with medium economical significance, such as the size of the plant leaf area is economically acceptable
  • a 5% decrease of a parameter with high economical significance such as the germination percentage, which dictates the number of marketable plants, is the maximum acceptable.
  • Maximal Non-Phytotoxic Doses for pesticides for individual plant species are required by the regulatory authorities and are thus routinely determined in the art for regulatory purposes. Methods for determining Maximal Non-Phytotoxic Doses of plant pesticides are thus well known to the skilled artisan and are described, for example, in the above-mentioned reference. The methodology to determine Maximal Non-Phytotoxic Doses of plant pesticides are known in the art. In general, Maximal Non-Phytotoxic Doses can range from 0.0001 to 1000 g of pesticide per kg seeds.
  • the specific value of the Maximal Non-Phytotoxic Dose may depend on a variety of parameters such as, for example, physical and biological factors which are unique for each individual pesticide (stability of the compound in the test environment, phytotoxicity against the plant species) and the nature of the plant material to be protected (surface area, consistency, moisture content and similar parameters). It may also vary depending on different pesticide formulations and methods of pesticide application for the same plant species.
  • plating pesticide-containing particles next to the pesticide-treated seed and the expression “next to the pesticide-treated seed” means sufficiently close to a locus of the pesticide-treated seed to allow diffusion of the pesticide from the pesticide-containing particles to the locus of the pesticide-treated seed.
  • the pesticide-containing particles can be placed before, during or after the sowing of the pesticide-treated seed, the invention is meant to cover all these embodiments of the invention.
  • plating pesticide- containing particles next to the pesticide-treated seed and the expression “next to the pesticide-treated seed” means in a distance of less that 10 cm, preferably less than 5 cm, more preferably less 4 cm, most preferably less than 1 cm, to a locus of the pesticide-treated seed.
  • pesticide-containing particles are placed (planted or sown) into an open-land field at the time a young plant is transplanted from a nursery tray into an open land, irrespective of (i) whether pesticide-containing particles are also placed in the nursery tray with the then pesticide-treated seeds or (ii) whether the pesticide on the pesticide- containing particles is the same or different from the pesticide-containing particles, if present, or pesticide-treated seeds in the nursery tray.
  • the placing of the pesticide-containing particles in the open-land field is such that to allow diffusion of the pesticide from the pesticide- containing particles to the locus of the young plant.
  • Such as a method allows a second level of pesticide protection to the transplanted young plant with the same, or a different, pesticide. This can be advantageous especially when pesticide protection is sought against pests that are not known to damage the young plant in the nursery trays, but only in the open-land field.
  • the pesticide dose contained in the pesticide-treated seed is more than or equal to the Minimal Pesticidal Dose of the pesticide and less then or equal to the Maximal Non-Phytotoxic Dose of the pesticide.
  • a "Minimal Pesticidal Dose” is a dose of a pesticide in a seed treatment that is needed to provide a partial control of the pest under normal test conditions, wherein said normal test conditions are as described above.
  • "Partial control of the pest” means a measurable pest control under normal test conditions and is lower than said "sufficient control of the pest", which is described above.
  • the pesticide dose contained in the pesticide-treated seed is equal to the Maximal Non-Phytotoxic Dose of the pesticide.
  • the pesticide dose contained in the pesticide-treated seed is in a range of between 10, 20, 30, 40, 50, 60, 70, 80 and/or 90% of the Effective Dose, with any individual number falling with this range of between 10% and 90% and including the boundaries of the range, 10% and 90%, also being part of the invention.
  • the respective dose that is applied to the pesticide-containing particles is in a range of between 90, 80, 70, 60, 50, 40, 30, 20 and/or 10% of Effective Dose, with any individual number falling with this range of between 10% and 90% and including the boundaries of the range, 10% and 90%, also being part of the invention.
  • the total dose that is applied to the seed and the pesticide-containing particles adds up to 100%, corresponding to the Effective Dose.
  • the dose applied to the seed is 10% of the Effective Dose
  • the pesticide-containing particles receive the remaining 90% of the Effective Dose.
  • the maximal dose that is applied to the seed to be protected may vary considerably within the above given range of between 10% to 90% of the Effective Dose depending on the plant species to be treated and the pesticide to be used, respectively.
  • Other parameters which may also be considered in the proper dosing of the pesticide are, for example, humidity, temperature, soil conditions and similar parameters.
  • Seed treatment methods are well known in the art, and they may be used readily to apply the pesticide to the seed. Examples for seed treatment methods are shown in Butler (in: “Coatings, films and treatments", Seed World, October, 19-24, 1993), Callan (1975, Outlook on Agriculture 8: 271-274), Maude (in: “Vegetable seed treatments”, Seed Treatment, CIPAC Monograph 2, Jeffs, Ed., pages 91-101 , 1978), US Patent 5,876,739 and US Patent 2,502,809.
  • the pesticide can be formulated, for example as a powder, as a wettable powder, as a water soluble powder, as a liquid formulation (e.g. aqueous or solvent-based), including a flowable concentrate (such as a suspension concentrate), solution and capsule suspension.
  • a powder as a wettable powder, as a water soluble powder, as a liquid formulation (e.g. aqueous or solvent-based), including a flowable concentrate (such as a suspension concentrate), solution and capsule suspension.
  • the formulation of the pesticide may also include an agent for assisting the adhesion of the formulation to the seed, for example a mineral oil or a film-forming barrier.
  • the pesticide or the formulation may be applied to the seed as a dust, as a slurry, as a soak, as a film-coating or as an encapsulation.
  • the method of application depends on the chemical and physical properties of the seed surface and the pesticide itself and may be varied.
  • the invention is intended to include any technique which is to be used.
  • a coating may be added to the seed using conventional coating or pelleting techniques, multiple different coatings are possible.
  • the coating may comprise any conventional material commonly used in the art for protecting or pelleting seed. Suitable materials include clays, such as sub-bentonite and bentonite, vermiculite, along with additives such as perlite, pumice, metal stearates, polyethylene, polystyrene, polyurethane, talcum powder, polypropylene, polyvinyl chloride, starches, loams, sugars, Arabic gums, organic polymers, celluloses, flours such as wood flours, quartz powders and the like.
  • the coating may comprise the pesticide, but may also comprise further adjuvants, for example pigments, antioxidants, dyes, odorants, agents, that convey a bitter taste, or beneficial substances for the plant, for example one or more other pesticides, such as, for example, an acaricide, bactericide, fungicide, insecticide, molluscicide, nematicide or rodenticide, one or more herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
  • pesticides such as, for example, an acaricide, bactericide, fungicide, insecticide, molluscicide, nematicide or rodenticide, one or more herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
  • the seed is used in the form of a seed-containing pellet.
  • a seed-containing pellet is formed with a filler material surrounding the seed.
  • filler materials include, among others, peat, soil, calcium carbonate, dolomite, gypsum, clay minerals, phosphates, titanium dioxide, humus and activated charcoal. Any agriculturally suitable material can be employed.
  • An adhesive material is often included in such a seed-containing pellet to ensure that the filler material remains in contact with the seed.
  • Many acceptable adhesives are known in the art and include, among others, synthetic glues, vegetable glues, gelatin and sugars.
  • a coating may be applied before or after the pelleting process.
  • a "pesticide-containing particle” refers to a composition comprising a pesticide and a suitable inert carrier. Suitable examples of “pesticide-containing particle” are pesticide-containing pellets and pesticide-containing granules. Pesticide-containing particles are well known in the art, for example see WO 01/13722, DE-4343176-A1 and CA Patent 1- 143-651. The type of pesticide-containing particles chosen will depend upon the particular purpose envisaged and the physical, chemical and biological properties of the pesticide.
  • the pesticide-containing particles comprises, by weight, 0.0001 to 95%, more preferably 1 to 85%, for example 5 to 60%, of the pesticide.
  • the pesticide-containing particles may have a core.
  • the core may be inert, for example, a glass-bead, perlite, plastic, pumice or any other suitable material. If desired however, it is also possible to use non-germinating seed, which is for example inactivated by heat treatment, gamma rays or microwaves, or other biodegradable organic material.
  • the pesticide-containing particles may contain a filler material.
  • the filler material can be applied to the particles before or after applying the pesticide. All types of filler material commonly used in seed treatment can be used. The types of filler materials are described above.
  • a substance is incorporated into the pesticide-containing particle to regulate the release of the pesticide, for example, after a certain time or at under certain conditions, such as temperature, moisture and humidity.
  • Such substances are known in the art. Such a controlled release is advantageous when pest protection is not needed immediately on sowing or planting the seed.
  • the pesticide-containing particles may comprise further adjuvants such as pigments, antioxidants, dyes, odorants, agents, that convey a bitter taste, or beneficial substances for the plant, for example one or more other pesticides, for example acaricides, bactericides, fungicides, insecticides, molluscicides, nematicides or rodenticides, herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
  • pesticides for example acaricides, bactericides, fungicides, insecticides, molluscicides, nematicides or rodenticides, herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
  • the pesticide-containing particles may be produced in any desired shape and size that allows for precise placement next to the pesticide-treated seed or transplanted young plant.
  • the pesticide-containing particles have substantially the same size, shape and weight as the seed. It is thus possible with precision sowing machinery to place a precisely defined number (as determined by the grower based on pest pressure) of pesticide-containing particles per plant next to the seed. Thus in a simple way both sub- and overdose can be effectively avoided.
  • one to four, especially one, pesticide-containing particle is used per pesticide-treated seed.
  • the ratio also applies in the event the pesticide-containing particles are used in the open-land field with transplanted young plants.
  • automated sowing can be carried out in the most cost-effective way. Machinery for use in such methods exist, and if desired can be adapted for a specific ratio.
  • both pesticide-containing particles and pesticide-treated seeds have a substantially uniform diameter ranging from 0.5 to 5 millimeter.
  • the seeds may be from the following useful plants: cereals, for example wheat, barley, rye, oats, rice, maize or sorghum; beet, for example sugar or fodder beet; fruit, for example pome fruit, stone fruit and soft fruit, for example apples, pears, plums, peaches, almonds, cherries or berries, for example strawberries, raspberries and blackberries; legumes, for example beans, lentils, peas or soya beans, oil crops, for example oilseed rape, mustard, poppies, olives, sunflowers, coconut, castor-oil plants, cacao or peanuts; cucurbits, for example pumpkins, cucumbers or melons; fibre plants, for example cotton, flax, hemp or jute; citrus fruit, for example oranges, lemons, grapefruit or mandarins; vegetables, for example spinach, lettuce, asparagus, brassica (e.g.
  • cabbage, broccoli, and cauliflower carrots, onions, tomatoes, potatoes or capsicums
  • Lauraceae for example avocado, Cinnamonium or camphor
  • the seeds may be preferably from the following useful plants: beet, for example sugar or fodder beet; vegetables, for example spinach, lettuce, asparagus, brassica, carrots, onions, tomatoes, cucurbits, potatoes or capsicums; tobacco.
  • the seeds may be most preferably from vegetables, for example lettuce, brassica, tomatoes and cucurbits.
  • the method according to the instant invention can be used to protect useful plants against pests, for example insects, representatives of the order Acarina, molluscs, nematodes, microorganisms, for example phytopathogenic fungi, or rodents.
  • pests for example insects, representatives of the order Acarina, molluscs, nematodes, microorganisms, for example phytopathogenic fungi, or rodents.
  • the method according to the instant invention can be used preferably to protect useful plants against insects, representatives of the order Acarina or nematodes.
  • insects are:
  • Lepidoptera for example, Acleris spp., Adoxophyes spp., Aegeria spp., Agrotis spp., Alabama argillaceae, Amylois spp., Anticarsia gemmatalis, Archips spp., Argyrotaenia spp., Astylus atromaculatus, Autographa spp., Busseola fusca, Cadra cautella, Carposina nipponensis, Chilo spp., Choristoneura spp., Clysia ambiguella, Cnaphalocrocis spp., Cnephasia spp., Cochylis spp., Coleophora spp., Crocidolomia binotalis, Cryptophlebia leucotreta, Cydia spp., Diatraea spp., Diparopsis castanea, Earias spp
  • Diabrotica spp. Dilopoderus spp., Epilachna spp., Eremnus spp., Heteronychus spp.,
  • Leptinotarsa decemlineata Lissorhoptrus spp., Melolontha spp., Orycaephilus spp., Otiorhynchus spp., Phlyctinus spp., Popillia spp., Psylliodes spp., Rhizopertha spp.,
  • Orthoptera for example, Blatta spp., Blattella spp., Gryllotalpa spp., Leucophaea maderae, Locusta spp., Periplaneta spp. and Schistocerca spp.;
  • Anoplura for example, Haematopinus spp., Linognathus spp., Pediculus spp., Pemphigus spp. und Phylloxera spp.;
  • Thysanoptera for example, Frankliniella spp., Hercinothrips spp., Taeniothrips spp., Thrips palmi, Thrips tabaci and Scirtothrips aurantii;
  • Heteroptera for example, Cimex spp., Distantiella theobroma, Dysdercus spp., Euchistus spp. Eurygaster spp. Leptocorisa spp., Nezara spp., Piesma spp., Rhodnius spp., Sahlbergella singularis, Scotinophara spp. and Thatoma spp.;
  • Aedes spp. Anthe gona soccata, Bibio hortulanus, Calliphora erythrocephala, Ceratitis spp., Chrysomyia spp., Culex spp., Cuterebra spp., Dacus spp., Drosophila melanogaster, Fannia spp., Gastrophilus spp., Glossina spp., Hypoderma spp., Hyppobosca spp., Liriomyza spp., Lucilia spp., Melanagromyza spp., Musca spp., Oestrus spp., Orseolia spp., Oscinella frit, Pegomyia hyoscyami, Phorbia spp., Rhagoletis pomonella, Sciara spp., Stomoxys spp., Tab
  • Siphonaptera for example, Ceratophyllus spp. and Xenopsylla cheopis
  • Thysanura for example, Lepisma saccharina.
  • Acarina for example, Acarus siro, Aceria sheldoni, Aculus pointedendali, Amblyomma spp., Argas spp., Boophilus spp., Brevipalpus spp., Bryobia praetiosa, Calipitrimerus spp., Chorioptes spp., Dermanyssus gallinae, Eotetranychus carpini, Eriophyes spp., Hyalomma spp., Ixodes spp., Olygonychus pratensis, Ornithodoros spp., Panonychus spp., Phyllocoptruta oleivora, Polyphagotarsonemus latus, Psoroptes spp., Rhipicephalus spp., Rhizoglyphus spp., Sarcoptes spp., Tarsonemus s
  • nematodes for example root knot nematodes, stem eelworms and foliar nematodes; especially Heterodera spp., for example Heterodera schachtii, Heterodora avenae and Heterodora trifolii; Globodera spp., for example Globodera rostochiensis; Meloidogyne spp., for example Meloidogyne incoginita and Meloidogyne javanica; Radopholus spp., for example Radopholus similis; Pratylenchus, for example Pratylenchus neglectans and Pratylenchus penetrans; Tylenchulus, for example Tylenchulus semipenetrans; Longidorus, Trichodorus, Xiphinema, Ditylenchus, Aphelenchoides and Anguina.
  • Heterodera spp. for example Heterodera schachti
  • the pesticide-containing particles and pesticide-treated seeds may have the same pesticide or different. Further, the pesticide on the particles or seeds may be more than one pesticide or active ingredient, which can be of different types of pesticides (e.g. fungicide, insecticide, acaricide, nematicide). In an embodiment, the pesticide-containing particle has one or more fungicide and one or more insecticide mixture of active ingredients. Alternatively, the pesticide- containing particle has one or more types of insecticide, such as thiamethoxam, imidacloprid and tefluthrin.
  • a particular advantage of the present invention is that several pesticides can be available to protect the seed and young plant at a vulnerable stage of its growth through the use of a defined number of pesticide-containing particles per pesticide- treated seed or transplanted young plant.
  • the pesticide is, for example, an acaricide, a bactericide, a fungicide, an insecticide, a molluscicide, a nematicide or a rodenticide, or a mixture of two or more thereof, for example, a fungicide and an insecticide or two insecticides.
  • the pesticide is an acaricide, a fungicide, nematicide or an insecticide, or a mixture of two or more thereof, for example, a fungicide and an insecticide or two insecticides.
  • more than one pesticide are present on a seed and/or particle.
  • the pesticide is an acaricide or an insecticide, such as, for example, spinosad, chlorpyriphos, imidacloprid, benfuracarb, clothianidin, fipronil, chlorfenvinphos and thiamethoxam, or a mixture of two or more thereof.
  • the pesticide is at least one of imidacloprid, thiamethoxam, clothianidin or abamectin.
  • the pesticide-containing particles contain the same pesticide as the pesticide-treated seeds. ln another embodiment, the pesticide-containing particles contain a different pesticide from the pesticide-treated seeds, which can be a different type of pesticide or a different active ingredient within the same type of pesticide.
  • the pesticide on the seed is at least thiamethoxam, azoxystrobin, fludioxonil and metalaxyl-M and the pesticide on the particle is at least abamectin.
  • a further aspect of the invention relates to a method of producing plants comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.
  • a further aspect of the invention relates to plants produced by a method comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.

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Abstract

Method of protecting a germinating seed treated with a pesticide comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.

Description

METHOD OF APPLYING PESTICIDES
The present invention relates to a method of protecting a germinating seed treated with a pesticide in agriculture and horticulture.
Methods for protecting plant seed against pests are well known in the field. Usually pesticides, for example insecticides or fungicides are applied alone or in combinations directly onto seeds during a seed treatment prior to sowing. Seed treatment is well-known in the art and comprises different methods, for example seed dressing, seed coating or seed pelleting.
In seed treatments pesticides are generally applied in relatively high doses to achieve adequate protection against the pest to be fought. It is well known in the art that, for example, high doses of some pesticides in seed treatment, when they exceed a certain threshold, can delay germination, hamper the growth vigor of the plant or induce other negative effects during germination. These effects, that occur predominantly in the seedling stage of a plant, are collectively called "phytotoxic" effects. Examples of pesticides that may cause phytotoxic effects depending on dosing, way of application, environmental conditions and similar parameters, can be found amongst the systemic insecticides, such as, for example, imidacloprid, thiamethoxam and clothianidin. Said phytotoxic effects are an economic disadvantage and restrict the flexibility of the corresponding pesticide in seed treatment. One way to avoid said phytotoxic effects is suggested in WO 01/13722 where it is proposed to apply the pesticide on a separate particle and place one of these pesticide-containing particles next to a seed. WO 01/13722 describes this method for pelleted lettuce seeds in combination with pellets containing the insecticide imidacloprid.
When the method as described in WO 01/13722 is applied in the plant-producing industry there still exist some economical disadvantages. Although modern seed sowing machines are quite accurate, a sowing failure of 1 to 2% can be present. Therefore, considering the mass- cultivation of plants that is characteristic for this industry, a significant portion of plants will receive no pesticide protection at all due to a sowing failure of the pesticide-containing particle during sowing.
A further important industry in the art of the invention is that of young plant growers. Young plant growers cultivate high-value plants, such as, for example lettuce, brassica, pepper, tomato and melon, in nurseries from the point in time of sowing the seed until the plant reaches the young plant stage. Typically, the young plant stage is reached between 4 and 6 weeks after sowing of the seed. Then the young plants are usually sold to a customer, who then transplants the young plants into an open-land field for further cultivation. Generally, while being in the nurseries of the young plant growers, the plants are cultivated on plant trays. Besides the already mentioned loss of pesticide-containing particles due to sowing failures, pesticide-containing particles can also be lost, for example during transport of said plant trays or during said transplanting into the open-land field.
By applying the method as described in WO 01/13722 in those high-value plant growing industries there is a significant financial loss as a considerable portion of plants will receive no pesticide protection at all due to sowing failures or due to loss of pesticide-containing particles during said plant handling operations.
The present invention recognizes the need to increase the yield of suitably pesticide- protected plants in mass-cultivations, that start already at the seed stage, without investments into the improvement of labour intensive operations, such as, for example, sowing or transplanting.
Typically, the plant trays used by the young plant growers contain a multitude of individual plant containers. Depending on the application, the size of said plant containers is in the range of 1 x 1 cm to 4 x 4 cm. The seed and the pesticide-containing particle are placed individually into the plant containers. Therefore, due to automation with the use of sowing machines, the seed and the pesticide-containing particle can easily have a distance to each other of up to 4 cm in the individual plant containers. Usually, the plants are cultivated for 4 to 6 weeks in the plant trays before they reach the young plant stage and are then transplanted into the open- land field. For a seed where a considerable distance, such as, for example 4 cm, lies between the seed and its corresponding pesticide-containing particle it is questionable, that the plant germinating from that seed receives an adequate pesticide protection already early after transplanting, because the pesticide has to be transported over that distance solely by diffusion.
The present invention also recognizes the need of conveying an early pesticide protection to those transplanted plants, where the seed and its corresponding pesticide-containing particle were situated in a considerable distance in the plant container.
The problems of increasing the yield of suitably pesticide protected plants in mass-cultivations and of conveying an early pesticide protection to transplanted plants are both overcome by the instant invention. According to the instant invention it is suggested not to apply the Effective Dose of the pesticide, that is a dose that is sufficient to protect one seed germ, on the pesticide-containing particles, which are placed next to the seed to be protected, but to distribute the Effective
Dose between the seed and the pesticide-containing particles in a suitable ratio.
The invention relates to a method of protecting a germinating seed treated with a pesticide comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide- containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide. This guarantees that those plants, that did not receive or have lost their pesticide-containing particles do not remain unprotected, as the pesticide will always be present directly on the seed at a dose that is lower than or equal to the Maximal Non- Phytotoxic Dose of the pesticide. By using said method a basic level of pesticide protection is conferred to all plants in a mass-cultivation without causing undesirable phytotoxic effects during germination. Said basic level of pesticide protection will also be present immediately after transplanting, even with those plants, whose pesticide-containing particles were situated in a considerable distance from the seed in the plant container. Thus an early protection is conferred to those plants without causing undesirable phytotoxic effects during germination.
Within the context of the present invention certain terms are meant to have a specific meaning as defined below:
According to the instant invention an "Effective Dose" is a dose of a pesticide in a seed treatment that is giving sufficient control of the pest under normal test conditions. Usually, said sufficient control is equal to the maximal obtainable control of the pest for the pesticide under normal test conditions. Said normal test conditions generally reflect the natural environment where the plants are to be grown and where the pest is to be fought. "Sufficient control of the pest" represents an economically interesting pest control and is, as a rule, in a range of between 70-100% control.
Tests for pesticidal activity of pesticides in seed treatments are well known in the art and include, for example, tests for insecticidal, fungicidal or miticidal activities. Examples for said tests can be found in Jukes et al. (in: "Evaluation of non-organophosphorus insecticides for controlling the cabbage root fly. The insecticide conundrum", Proceedings 52nd International Symposium on Crop Protection, Gent, Belgium, 2000), Ester et al. (in: "Filmcoating the seed of cabbage (Brassica oleracea L. covar. Capitata L.) and cauliflower (Brassica oleracea L. var. Botrytis L.) with imidacloprid and spinosad to control insect pests", 2003, Crop Protection
22(5): 761 -768), Ester and Brantjes (in: "Pelleting the seed of iceberg lettuce (Lactuca sativa
L.) and butterhead lettuce (Lactuca sativa L. var. capitata L.) with imidacloprid to control aphids", Proceedings 50th International Symposium on Crop Protection, Gent, Belgium, 1998) and Hofer et al. (in: "Thiamethoxam (CGA 293'343) - a novel insecticide for seed delivered insect control", 2001 BCPC Symposium Proceedings No.76, Seed Treatment). Information about Effective Doses for individual pesticides to be used in specific plant/pest systems are required by the regulatory authorities and are thus routinely determined in the art for regulatory purposes. Examples for such Effective Doses are: 0.8 g of imidacloprid per 1000 lettuce seeds (dutch registration code no. 11455), 0.096 g of chlorpyriphos per 1000 brassica seeds (dutch registration code no. 10968), 0.175 g of metalaxyl-m per kg brassica seeds (dutch registration code no. 12280), 1 g of carbendazim per kg onion seeds (dutch registration code no. 8672), 5 g of iprodioneper kg carrot seeds (dutch registration code no. 8928) and 1.6 g of thiramper kg radish seeds (dutch registration code no. 11492).
The methodology to determine pesticidal activity including the Effective Dose are known in the art and are described, for example, in the above-mentioned references. In general, the Effective Dose can range from 0.0001 to 1000 g of pesticide per kg seeds. However, the specific value of the Effective Dose may depend on a variety of parameters such as, for example, physical and biological factors which are unique for each individual pesticide
(stability of the compound in the test environment, efficacy against the pest to be controlled) and the nature of the plant material to be protected (surface area, consistency, moisture content and similar parameters). It may also vary depending on different pesticide formulations and methods of pesticide application for the same plant/pest system.
According to the instant invention a "Maximal Non-Phytotoxic Dose" is that proportion of the Effective Dose that is just sufficiently low not to cause an economically undesirable phytotoxic effect on the plant. Examples for phytotoxic effects are a delay in germination, a hampering of the growth vigor of the plant and other negative effects during germination. Tests for phytotoxic effects in seed treatments are well known in the art and include, for example the analysis of the germination percentage, the analysis of the germination speed, the analysis of the yield of normal developed plants and the analysis of the plant leaf area development. An example for said tests can be found in W0 01/13722.
As a rule, an economically undesirable phytotoxic effect is seen, when the value of a beneficial parameter, such as, for example, the germination rate or the growth of the size of the plant leaf area, is diminished below 95-75% of the value of the untreated control. Here the economical significance of the parameter chosen for the phytotoxicity test has to be taken into account. Whereas a 25% decrease of a parameter with medium economical significance, such as the size of the plant leaf area, is economically acceptable, a 5% decrease of a parameter with high economical significance, such as the germination percentage, which dictates the number of marketable plants, is the maximum acceptable. It has to be mentioned that for some rare and exceptional plant/pest/pesticide systems a certain amount of phytotoxicity exceeding the above mentioned values might be tolerated economically as an increased pesticide protection available directly to the seed would compensate the economic disadvantage caused by the phytotoxic effect. The invention is also meant to cover these rare and exceptional cases.
Information about Maximal Non-Phytotoxic Doses for pesticides for individual plant species are required by the regulatory authorities and are thus routinely determined in the art for regulatory purposes. Methods for determining Maximal Non-Phytotoxic Doses of plant pesticides are thus well known to the skilled artisan and are described, for example, in the above-mentioned reference. The methodology to determine Maximal Non-Phytotoxic Doses of plant pesticides are known in the art. In general, Maximal Non-Phytotoxic Doses can range from 0.0001 to 1000 g of pesticide per kg seeds. However, the specific value of the Maximal Non-Phytotoxic Dose may depend on a variety of parameters such as, for example, physical and biological factors which are unique for each individual pesticide (stability of the compound in the test environment, phytotoxicity against the plant species) and the nature of the plant material to be protected (surface area, consistency, moisture content and similar parameters). It may also vary depending on different pesticide formulations and methods of pesticide application for the same plant species.
According to the instant invention in the expression "placing pesticide-containing particles next to the pesticide-treated seed", and the expression "next to the pesticide-treated seed" means sufficiently close to a locus of the pesticide-treated seed to allow diffusion of the pesticide from the pesticide-containing particles to the locus of the pesticide-treated seed.
It has to be mentioned, that the pesticide-containing particles can be placed before, during or after the sowing of the pesticide-treated seed, the invention is meant to cover all these embodiments of the invention.
According to a specific embodiment of the invention in the expression "placing pesticide- containing particles next to the pesticide-treated seed" and the expression "next to the pesticide-treated seed" means in a distance of less that 10 cm, preferably less than 5 cm, more preferably less 4 cm, most preferably less than 1 cm, to a locus of the pesticide-treated seed.
In particular it is also envisaged that pesticide-containing particles are placed (planted or sown) into an open-land field at the time a young plant is transplanted from a nursery tray into an open land, irrespective of (i) whether pesticide-containing particles are also placed in the nursery tray with the then pesticide-treated seeds or (ii) whether the pesticide on the pesticide- containing particles is the same or different from the pesticide-containing particles, if present, or pesticide-treated seeds in the nursery tray. The placing of the pesticide-containing particles in the open-land field is such that to allow diffusion of the pesticide from the pesticide- containing particles to the locus of the young plant. Such as a method allows a second level of pesticide protection to the transplanted young plant with the same, or a different, pesticide. This can be advantageous especially when pesticide protection is sought against pests that are not known to damage the young plant in the nursery trays, but only in the open-land field.
In a preferred embodiment of the invention it is envisaged that the pesticide dose contained in the pesticide-treated seed is more than or equal to the Minimal Pesticidal Dose of the pesticide and less then or equal to the Maximal Non-Phytotoxic Dose of the pesticide. According to the instant invention a "Minimal Pesticidal Dose" is a dose of a pesticide in a seed treatment that is needed to provide a partial control of the pest under normal test conditions, wherein said normal test conditions are as described above. "Partial control of the pest" means a measurable pest control under normal test conditions and is lower than said "sufficient control of the pest", which is described above.
In an especially preferred embodiment of the invention it is envisaged that the pesticide dose contained in the pesticide-treated seed is equal to the Maximal Non-Phytotoxic Dose of the pesticide. Thus a high level of protection is conferred directly to the plant and simultaneously the economic disadvantage due to phytotoxicity in the young plant stage is kept at an economically acceptable level.
In another embodiment of the invention, the pesticide dose contained in the pesticide-treated seed is in a range of between 10, 20, 30, 40, 50, 60, 70, 80 and/or 90% of the Effective Dose, with any individual number falling with this range of between 10% and 90% and including the boundaries of the range, 10% and 90%, also being part of the invention. Consequently, the respective dose that is applied to the pesticide-containing particles is in a range of between 90, 80, 70, 60, 50, 40, 30, 20 and/or 10% of Effective Dose, with any individual number falling with this range of between 10% and 90% and including the boundaries of the range, 10% and 90%, also being part of the invention. The total dose that is applied to the seed and the pesticide-containing particles adds up to 100%, corresponding to the Effective Dose. If, therefore, for example, the dose applied to the seed is 10% of the Effective Dose, the pesticide-containing particles receive the remaining 90% of the Effective Dose. The maximal dose that is applied to the seed to be protected may vary considerably within the above given range of between 10% to 90% of the Effective Dose depending on the plant species to be treated and the pesticide to be used, respectively. Other parameters which may also be considered in the proper dosing of the pesticide are, for example, humidity, temperature, soil conditions and similar parameters.
Seed treatment methods are well known in the art, and they may be used readily to apply the pesticide to the seed. Examples for seed treatment methods are shown in Butler (in: "Coatings, films and treatments", Seed World, October, 19-24, 1993), Callan (1975, Outlook on Agriculture 8: 271-274), Maude (in: "Vegetable seed treatments", Seed Treatment, CIPAC Monograph 2, Jeffs, Ed., pages 91-101 , 1978), US Patent 5,876,739 and US Patent 2,502,809.
The pesticide formulation and methods of treating seeds therewith are known in the art.
Generally, the pesticide can be formulated, for example as a powder, as a wettable powder, as a water soluble powder, as a liquid formulation (e.g. aqueous or solvent-based), including a flowable concentrate (such as a suspension concentrate), solution and capsule suspension.
The formulation of the pesticide may also include an agent for assisting the adhesion of the formulation to the seed, for example a mineral oil or a film-forming barrier. The pesticide or the formulation may be applied to the seed as a dust, as a slurry, as a soak, as a film-coating or as an encapsulation. The method of application depends on the chemical and physical properties of the seed surface and the pesticide itself and may be varied. The invention is intended to include any technique which is to be used.
A coating may be added to the seed using conventional coating or pelleting techniques, multiple different coatings are possible. The coating may comprise any conventional material commonly used in the art for protecting or pelleting seed. Suitable materials include clays, such as sub-bentonite and bentonite, vermiculite, along with additives such as perlite, pumice, metal stearates, polyethylene, polystyrene, polyurethane, talcum powder, polypropylene, polyvinyl chloride, starches, loams, sugars, Arabic gums, organic polymers, celluloses, flours such as wood flours, quartz powders and the like. The coating may comprise the pesticide, but may also comprise further adjuvants, for example pigments, antioxidants, dyes, odorants, agents, that convey a bitter taste, or beneficial substances for the plant, for example one or more other pesticides, such as, for example, an acaricide, bactericide, fungicide, insecticide, molluscicide, nematicide or rodenticide, one or more herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
In a specific embodiment of the invention the seed is used in the form of a seed-containing pellet. A seed-containing pellet is formed with a filler material surrounding the seed. Many diverse filler materials are known in the art and include, among others, peat, soil, calcium carbonate, dolomite, gypsum, clay minerals, phosphates, titanium dioxide, humus and activated charcoal. Any agriculturally suitable material can be employed. An adhesive material is often included in such a seed-containing pellet to ensure that the filler material remains in contact with the seed. Many acceptable adhesives are known in the art and include, among others, synthetic glues, vegetable glues, gelatin and sugars. A coating may be applied before or after the pelleting process.
According to the invention a "pesticide-containing particle" refers to a composition comprising a pesticide and a suitable inert carrier. Suitable examples of "pesticide-containing particle" are pesticide-containing pellets and pesticide-containing granules. Pesticide-containing particles are well known in the art, for example see WO 01/13722, DE-4343176-A1 and CA Patent 1- 143-651. The type of pesticide-containing particles chosen will depend upon the particular purpose envisaged and the physical, chemical and biological properties of the pesticide.
It is preferred that the pesticide-containing particles comprises, by weight, 0.0001 to 95%, more preferably 1 to 85%, for example 5 to 60%, of the pesticide.
The pesticide-containing particles may have a core. The core may be inert, for example, a glass-bead, perlite, plastic, pumice or any other suitable material. If desired however, it is also possible to use non-germinating seed, which is for example inactivated by heat treatment, gamma rays or microwaves, or other biodegradable organic material.
The pesticide-containing particles may contain a filler material. The filler material can be applied to the particles before or after applying the pesticide. All types of filler material commonly used in seed treatment can be used. The types of filler materials are described above.
In an embodiment of the invention a substance is incorporated into the pesticide-containing particle to regulate the release of the pesticide, for example, after a certain time or at under certain conditions, such as temperature, moisture and humidity. Such substances are known in the art. Such a controlled release is advantageous when pest protection is not needed immediately on sowing or planting the seed.
The pesticide-containing particles may comprise further adjuvants such as pigments, antioxidants, dyes, odorants, agents, that convey a bitter taste, or beneficial substances for the plant, for example one or more other pesticides, for example acaricides, bactericides, fungicides, insecticides, molluscicides, nematicides or rodenticides, herbicides, growth hormones, nutrients, fertilizers, for example nitrogen-, potassium- or phosphorus-containing fertilizers, germination stimulants, micro organisms, pheromones or biological preparations.
The pesticide-containing particles may be produced in any desired shape and size that allows for precise placement next to the pesticide-treated seed or transplanted young plant.
According to a preferred embodiment of the invention, the pesticide-containing particles have substantially the same size, shape and weight as the seed. It is thus possible with precision sowing machinery to place a precisely defined number (as determined by the grower based on pest pressure) of pesticide-containing particles per plant next to the seed. Thus in a simple way both sub- and overdose can be effectively avoided.
According to a further preferred embodiment of the invention one to four, especially one, pesticide-containing particle is used per pesticide-treated seed. The ratio also applies in the event the pesticide-containing particles are used in the open-land field with transplanted young plants. Thus automated sowing can be carried out in the most cost-effective way. Machinery for use in such methods exist, and if desired can be adapted for a specific ratio.
According to a further preferred embodiment of the invention, both pesticide-containing particles and pesticide-treated seeds have a substantially uniform diameter ranging from 0.5 to 5 millimeter.
The seeds may be from the following useful plants: cereals, for example wheat, barley, rye, oats, rice, maize or sorghum; beet, for example sugar or fodder beet; fruit, for example pome fruit, stone fruit and soft fruit, for example apples, pears, plums, peaches, almonds, cherries or berries, for example strawberries, raspberries and blackberries; legumes, for example beans, lentils, peas or soya beans, oil crops, for example oilseed rape, mustard, poppies, olives, sunflowers, coconut, castor-oil plants, cacao or peanuts; cucurbits, for example pumpkins, cucumbers or melons; fibre plants, for example cotton, flax, hemp or jute; citrus fruit, for example oranges, lemons, grapefruit or mandarins; vegetables, for example spinach, lettuce, asparagus, brassica (e.g. cabbage, broccoli, and cauliflower), carrots, onions, tomatoes, potatoes or capsicums; Lauraceae, for example avocado, Cinnamonium or camphor; or tobacco, nuts, coffee, egg plants, sugar cane, tea, pepper, grapevines, hops, Musaceae, latex plants or ornamentals (such as houseplants used in outdoor gardening or landscaping).
The seeds may be preferably from the following useful plants: beet, for example sugar or fodder beet; vegetables, for example spinach, lettuce, asparagus, brassica, carrots, onions, tomatoes, cucurbits, potatoes or capsicums; tobacco.
The seeds may be most preferably from vegetables, for example lettuce, brassica, tomatoes and cucurbits.
The method according to the instant invention can be used to protect useful plants against pests, for example insects, representatives of the order Acarina, molluscs, nematodes, microorganisms, for example phytopathogenic fungi, or rodents.
The method according to the instant invention can be used preferably to protect useful plants against insects, representatives of the order Acarina or nematodes. Examples of insects are:
of the order Lepidoptera, for example, Acleris spp., Adoxophyes spp., Aegeria spp., Agrotis spp., Alabama argillaceae, Amylois spp., Anticarsia gemmatalis, Archips spp., Argyrotaenia spp., Astylus atromaculatus, Autographa spp., Busseola fusca, Cadra cautella, Carposina nipponensis, Chilo spp., Choristoneura spp., Clysia ambiguella, Cnaphalocrocis spp., Cnephasia spp., Cochylis spp., Coleophora spp., Crocidolomia binotalis, Cryptophlebia leucotreta, Cydia spp., Diatraea spp., Diparopsis castanea, Earias spp., Elasmopalpus spp., Ephestia spp., Eucosma spp., Eupoecilia ambiguella, Euproctis spp., Euxoa spp., Grapholita spp., Hedya nubiferana, Heliothis spp., Hellula undalis, Heteronychus arator, Hyphantria cunea, Keiferia lycopersicella, Leucoptera scitella, Lithocollethis spp., Lobesia botrana, Lymantria spp., Lyonetia spp., Malacosoma spp., Mamestra brassicae, Manduca sexta, Operophtera spp., Ostrinia nubilalis, Pammene spp., Pandemis spp., Panolis flammea, Pectinophora gossypiella, Phthorimaea operculella, Pieris rapae, Pieris spp., Plutella xylostella, Prays spp., Scirpophaga spp., Sesamia spp., Sparganothis spp., Spodoptera spp., Synanthedon spp., Thaumetopoea spp., Tortrix spp., Trichoplusia ni and Yponomeuta spp.; of the order Coleoptera, for example, Agriotes spp., Anthonomus spp., Atomaria linearis,
Chaetocnema tibialis, Conotrachelus spp., Cosmopolites spp., Curculio spp., Dermestes spp.,
Diabrotica spp., Dilopoderus spp., Epilachna spp., Eremnus spp., Heteronychus spp.,
Leptinotarsa decemlineata, Lissorhoptrus spp., Melolontha spp., Orycaephilus spp., Otiorhynchus spp., Phlyctinus spp., Popillia spp., Psylliodes spp., Rhizopertha spp.,
Scarabeidae, Somaticus spp., Sitophilus spp., Sitotroga spp., Tanymecus spp., Tenebrio spp.,
Tribolium spp., Trogoderma spp. and Zabrus spp.;
of the order Orthoptera, for example, Blatta spp., Blattella spp., Gryllotalpa spp., Leucophaea maderae, Locusta spp., Periplaneta spp. and Schistocerca spp.;
of the order Psocoptera, for example Liposcelis spp.;
of the order Anoplura, for example, Haematopinus spp., Linognathus spp., Pediculus spp., Pemphigus spp. und Phylloxera spp.;
of the order Isoptera, for example, Reticulitermes spp.;
of the order Mallophaga, for example, Damalinea spp. and Trichodectes spp.;
of the order Thysanoptera, for example, Frankliniella spp., Hercinothrips spp., Taeniothrips spp., Thrips palmi, Thrips tabaci and Scirtothrips aurantii;
of the order Heteroptera, for example, Cimex spp., Distantiella theobroma, Dysdercus spp., Euchistus spp. Eurygaster spp. Leptocorisa spp., Nezara spp., Piesma spp., Rhodnius spp., Sahlbergella singularis, Scotinophara spp. and Thatoma spp.;
of the order Homoptera, for example, Aleurothrixus floccosus, Aleyrodes brassicae, Aonidiella spp., Aphididae, Aphis spp., Aspidiotus spp., Bemisia tabaci, Ceroplaster spp., Chrysomphalus aonidium, Chrysomphalus dictyospermi, Coccus hesperidum, Empoasca spp., Eriosoma la gerum, Erythroneura spp., Gascardia spp., Laodelphax spp., Lecanium corni, Lepidosaphes spp., Macrosiphus spp., Myzus spp., Nephotettix spp., Nilaparvata spp., Paratoria spp., Pemphigus spp., Planococcus spp., Pseudaulacaspis spp., Pseudococcus spp., Psylla spp., Pulvinaria aethiopica, Quadraspidiotus spp., Rhopalosiphum spp., Saissetia spp., Scaphoideus spp., Schizaphis spp., Sitobion spp., Trialeurodes vaporariorum, Trioza erytreae and Unaspis citri; of the order Hymenoptera, for example, Acromyrmex, Atta spp., Cephus spp., Diprion spp., Diprionidae, Gilpinia polytoma, Hoplocampa spp., Lasius spp., Monomorium pharaonis, Neodiprion spp., Solenopsis spp. and Vespa spp.;
of the order Diptera, for example, Aedes spp., Anthe gona soccata, Bibio hortulanus, Calliphora erythrocephala, Ceratitis spp., Chrysomyia spp., Culex spp., Cuterebra spp., Dacus spp., Drosophila melanogaster, Fannia spp., Gastrophilus spp., Glossina spp., Hypoderma spp., Hyppobosca spp., Liriomyza spp., Lucilia spp., Melanagromyza spp., Musca spp., Oestrus spp., Orseolia spp., Oscinella frit, Pegomyia hyoscyami, Phorbia spp., Rhagoletis pomonella, Sciara spp., Stomoxys spp., Tabanus spp., Tannia spp. and Tipula spp.;
of the order Siphonaptera, for example, Ceratophyllus spp. and Xenopsylla cheopis; or
of the order Thysanura, for example, Lepisma saccharina.
Amongst the representatives of the order Acarina, for example, Acarus siro, Aceria sheldoni, Aculus schlechtendali, Amblyomma spp., Argas spp., Boophilus spp., Brevipalpus spp., Bryobia praetiosa, Calipitrimerus spp., Chorioptes spp., Dermanyssus gallinae, Eotetranychus carpini, Eriophyes spp., Hyalomma spp., Ixodes spp., Olygonychus pratensis, Ornithodoros spp., Panonychus spp., Phyllocoptruta oleivora, Polyphagotarsonemus latus, Psoroptes spp., Rhipicephalus spp., Rhizoglyphus spp., Sarcoptes spp., Tarsonemus spp. and Tetranychus spp..
Amongst nematodes, for example root knot nematodes, stem eelworms and foliar nematodes; especially Heterodera spp., for example Heterodera schachtii, Heterodora avenae and Heterodora trifolii; Globodera spp., for example Globodera rostochiensis; Meloidogyne spp., for example Meloidogyne incoginita and Meloidogyne javanica; Radopholus spp., for example Radopholus similis; Pratylenchus, for example Pratylenchus neglectans and Pratylenchus penetrans; Tylenchulus, for example Tylenchulus semipenetrans; Longidorus, Trichodorus, Xiphinema, Ditylenchus, Aphelenchoides and Anguina.
And amongst crucifer flea beetles (Phyllotreta spp.), root maggots (Delia spp.) and cabbage seedpod weevil (Ceutorhynchus spp.). The pesticide-containing particles and pesticide-treated seeds may have the same pesticide or different. Further, the pesticide on the particles or seeds may be more than one pesticide or active ingredient, which can be of different types of pesticides (e.g. fungicide, insecticide, acaricide, nematicide). In an embodiment, the pesticide-containing particle has one or more fungicide and one or more insecticide mixture of active ingredients. Alternatively, the pesticide- containing particle has one or more types of insecticide, such as thiamethoxam, imidacloprid and tefluthrin.
Generally, the difficulties, such as phytotoxicity and physical impracticabilities, with including several different pesticides onto a seed prohibit the use of several pesticides at a rate effective for pest control. Accordingly, a particular advantage of the present invention is that several pesticides can be available to protect the seed and young plant at a vulnerable stage of its growth through the use of a defined number of pesticide-containing particles per pesticide- treated seed or transplanted young plant.
The pesticide is, for example, an acaricide, a bactericide, a fungicide, an insecticide, a molluscicide, a nematicide or a rodenticide, or a mixture of two or more thereof, for example, a fungicide and an insecticide or two insecticides.
In an embodiment of the invention, the pesticide is an acaricide, a fungicide, nematicide or an insecticide, or a mixture of two or more thereof, for example, a fungicide and an insecticide or two insecticides.
It is preferred that more than one pesticide, whether of the same type or different type, are present on a seed and/or particle.
According to another embodiment of the invention, the pesticide is an acaricide or an insecticide, such as, for example, spinosad, chlorpyriphos, imidacloprid, benfuracarb, clothianidin, fipronil, chlorfenvinphos and thiamethoxam, or a mixture of two or more thereof.
According to an especially preferred embodiment of the invention, the pesticide is at least one of imidacloprid, thiamethoxam, clothianidin or abamectin.
In an embodiment, the pesticide-containing particles contain the same pesticide as the pesticide-treated seeds. ln another embodiment, the pesticide-containing particles contain a different pesticide from the pesticide-treated seeds, which can be a different type of pesticide or a different active ingredient within the same type of pesticide. Preferably, the pesticide on the seed is at least thiamethoxam, azoxystrobin, fludioxonil and metalaxyl-M and the pesticide on the particle is at least abamectin.
A further aspect of the invention relates to a method of producing plants comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.
A further aspect of the invention relates to plants produced by a method comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.

Claims

1. Method of protecting a germinating seed treated with a pesticide comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide-treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide- treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide.
2. Method according to claim 1 , wherein the pesticide dose contained in the pesticide-treated seed is equal to the Maximal Non-Phytotoxic Dose of the pesticide.
3. Method according to claim 1 or 2, wherein one to four pesticide-containing particles are placed next to the pesticide-treated seed.
4. Method according to any one of claims 1 to 3, wherein the pesticide dose contained in the pesticide-treated seed is in a range of between 10 and 90% of the Effective Dose and the respective dose that is contained in the pesticide-containing particles is in a range of between 90 and 10% of the Effective Dose.
5. Method according to any one of claims 1 to 4, wherein the pesticide-treated seed is used in the form of a seed-containing pellet.
6. Method according to any one of claims 1 to 5, wherein the pesticide-containing particles have substantially the same size, shape and weight as the pesticide-treated seed.
7. Method according to any one of claims 1 to 6, wherein one pesticide-containing particle is placed next to the pesticide-treated seed.
8. Method according to any one of claims 1 to 7, wherein the pesticide is an acaricide or an insecticide or a mixture of two or more thereof.
9. Method according to any one of claims 1 to 8, wherein the pesticide is imidacloprid or thiamethoxam.
10. Method of producing plants comprising placing one or more pesticide-containing particles next to a pesticide-treated seed, wherein the amount of pesticide is such that the pesticide- treated seed and the pesticide-containing particles together contain an Effective Dose of the pesticide and the pesticide dose contained in the pesticide-treated seed is less than or equal to the Maximal Non-Phytotoxic Dose of the pesticide
11. Plants produced by a method according to claim 10.
PCT/EP2005/006208 2004-06-10 2005-06-09 Method of applying pesticides WO2005120226A2 (en)

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AU2005251468A AU2005251468B2 (en) 2004-06-10 2005-06-09 Method of applying pesticides
JP2007526306A JP5567253B2 (en) 2004-06-10 2005-06-09 How to apply pesticides
KR1020067025951A KR101238276B1 (en) 2004-06-10 2005-06-09 Method of applying pesticides
MXPA06013613A MXPA06013613A (en) 2004-06-10 2005-06-09 Method of applying pesticides.
EP05759213A EP1778009A2 (en) 2004-06-10 2005-06-09 Method of applying pesticides
US11/569,754 US8347551B2 (en) 2004-06-10 2005-06-09 Method of applying pesticides
CA2567820A CA2567820C (en) 2004-06-10 2005-06-09 Method of applying pesticides
BRPI0510850-0A BRPI0510850A (en) 2004-06-10 2005-06-09 method of applying pesticides

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WO2019166558A1 (en) 2018-02-28 2019-09-06 Basf Se Use of pyrazole propargyl ethers as nitrification inhibitors
WO2019166560A1 (en) 2018-02-28 2019-09-06 Basf Se Use of n-functionalized alkoxy pyrazole compounds as nitrification inhibitors
WO2020002472A1 (en) 2018-06-28 2020-01-02 Basf Se Use of alkynylthiophenes as nitrification inhibitors
WO2020020765A1 (en) 2018-07-23 2020-01-30 Basf Se Use of a substituted thiazolidine compound as nitrification inhibitor
WO2020020777A1 (en) 2018-07-23 2020-01-30 Basf Se Use of substituted 2-thiazolines as nitrification inhibitors
EP3680223A1 (en) 2019-01-10 2020-07-15 Basf Se Mixture comprising an urease inhibitor (ui) and a nitrification inhibitor (ni) such as an ni mixture comprising 2-(3,4-dimethyl-1h-pyrazol-1-yl)succinic acid (dmpsa) and dicyandiamide (dcd)
WO2021144193A2 (en) 2020-01-16 2021-07-22 Basf Se Mixtures comprising a solid carrier comprising an urease inhibitor and a further solid carrier comprising a nitrification inhibitor
WO2021144195A1 (en) 2020-01-16 2021-07-22 Basf Se Mixtures comprising nitrification inhibitors and carriers
WO2022167488A1 (en) 2021-02-02 2022-08-11 Basf Se Synergistic action of dcd and alkoxypyrazoles as nitrification inhibitors
WO2022243521A1 (en) 2021-05-21 2022-11-24 Basf Se Use of ethynylpyridine compounds as nitrification inhibitors
WO2022243523A1 (en) 2021-05-21 2022-11-24 Basf Se Use of an n-functionalized alkoxy pyrazole compound as nitrification inhibitor
WO2022268810A1 (en) 2021-06-21 2022-12-29 Basf Se Metal-organic frameworks with pyrazole-based building blocks
WO2023203066A1 (en) 2022-04-21 2023-10-26 Basf Se Synergistic action as nitrification inhibitors of dcd oligomers with alkoxypyrazole and its oligomers

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AU2005251468B2 (en) 2011-10-06
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JP5567253B2 (en) 2014-08-06
CN100515192C (en) 2009-07-22
US8347551B2 (en) 2013-01-08
JP2012228267A (en) 2012-11-22
CA2567820A1 (en) 2005-12-22
BRPI0510850A (en) 2007-11-27
WO2005120226A3 (en) 2006-05-18
AU2005251468A1 (en) 2005-12-22
JP2008501353A (en) 2008-01-24
RU2007100132A (en) 2008-07-20
KR101238276B1 (en) 2013-03-04
CA2567820C (en) 2014-05-13
RU2407286C2 (en) 2010-12-27
MA28721B1 (en) 2007-07-02
CN1964623A (en) 2007-05-16
EP1778009A2 (en) 2007-05-02
US20070249498A1 (en) 2007-10-25

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