JPH08280210A - Seed of rape crop coated with agrochemical - Google Patents

Abstract

PURPOSE: To obtain seeds of cruciferous crop plants such as Japanese radish, white turnip or red turnip in which the seeds are coated with a synthetic pyrethroid on their surfaces and the synthetic pyrethroid can be suitably controlled in its elution rate and can increase the yield of their rootstocks. CONSTITUTION: The seeds are coated with a synthetic pyrethroid such as cypermeththrin and/or permethrin or an adhesive resin layer containing a synthetic pyrethroid on their surfaces. The amount of the synthetic pyrethroid coating the seeds is preferably 5-25wt.% of the amount required for controlling main insect pests.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Brassicaceae crop seed having a seed surface coated with a synthetic pyrethroid. The purpose of the synthetic pyrethroid coating on the seed surface is to increase the yield of the roots of the cruciferous crops from the seed. The above cruciferous crop is, for example, a radish, a white turnip, or a red turnip whose main food is the rhizome.

[0002]

2. Description of the Related Art In order to increase the yield of rootstocks of cruciferous crops, the amount used is 5 to 25% by weight of the amount used per unit area capable of expressing an insecticidal action.
There has been no case that the synthetic pyrethroid was applied to the habitat of cruciferous crops to increase the yield. In addition, there is no example in which the seed of a Brassicaceae crop is coated with a synthetic pyrethroid for the same purpose or for the same purpose and the amount used. With regard to cruciferous crops, when synthetic pyrethroids are sprayed at a concentration capable of exerting an insecticidal action, phytotoxicity such as yellowing may occur depending on the variety, so it is necessary to exercise caution when using it. The effects of synthetic pyrethroids, which can stably express the increase in the yield of rhizomes without damaging rape crops, are known.

[0003]

[Means for Solving the Problems] Surprisingly, it was found that coating a trace amount of a synthetic pyrethroid on the seed surface of a cruciferous crop leads to an increase in the yield of the rhizome of the cruciferous crop grown from the seed. . Then, the amount of the synthetic pyrethroid sown in a unit area and coated on the root crop yielding cruciferous crop seed is the unit area required for controlling the main insect pest for controlling the synthetic pyrethroid. It has been found that an application rate of 5 to 25% by weight, preferably 10 to 20% by weight, is sufficient.
When the surface of seeds of Brassicaceae is coated with an adhesive resin containing synthetic pyrethroid, the adhesive resin layer containing the synthetic pyrethroid adheres to the seed surface, and the synthetic pyrethroid drops off from the seed surface and the synthetic pyrethroid is removed. Will not be unevenly distributed. In addition, it is possible to avoid instability of the yield-increasing effect due to non-uniform distribution, and to prevent chemical damage and scattering to neighboring cultivated land due to dropout. As a result, it is possible to avoid phytotoxicity of crops that are likely to cause phytotoxicity due to synthetic pyrethroids in the vicinity of cultivated land, adverse effects on fish, and adverse effects on silkworms due to contamination of synthetic pyrethroids on mulberry crops for silkworm feed. Since the synthetic pyrethroid is contained in the adhesive resin layer, it is possible to avoid contamination of the hand when sowing and the machine when sowing the machine. Furthermore, when a surfactant and / or an inorganic auxiliary agent is added in addition to this synthetic pyrethroid, the performance of the obtained Brassicae crop seeds for increasing the yield of rhizomes is further improved, as will be described later regarding the effect of addition of each additive. It has been found.

Next, the contents of the present invention will be described in more detail. (Brassicaceae crop seed) The Brassicaceae crop seed cultivated in the present invention is a seed of a Japanese radish (Raphnus sativus L.) belonging to (Crossflower family, Cruciferae). More specifically, it is a seed of varieties such as radish, white turnip, or red turnip (twenty-day radish) whose main roots are edible (commonly called root vegetables).

(Pyrethroids Coated on Brassicaceous Crop Seeds) The chemical structure of pyrethroids coated on Cruciferous crop seeds is characterized in that the molecule contains an acid moiety containing a cyclopropane ring through an ester bond and a five-membered unsaturated ketone. It is of course based on the fact that it is composed of an alcohol portion, but it also includes those having a mechanism of action that resembles a pyrethroid even without this basic structure. This is because the synthetic pyrethroid used in the present invention has a compound having no cyclopropane ring (for example, fenvalerate, flucitrinate), a compound having an ether bond instead of an ester bond (for example, etofenprox) and an ester. It is meant to also include compounds with amino bonds rather than bonds (eg, fluvalinate).

Specific examples of pyrethroids are described below by their generic names and chemical names, but not limited to these: permethrin [chemical name: 3-phenoxybenzyl = (1R
S, 3RS)-(1RS, 3RS) -3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate], cypermethrin [chemical name: (RS)-
α cyano-3-phenoxybenzyl = (1RS, 3S
R)-(1RS, 3RS) -3- (2,2-dichlorovinyl) -2,2-dimethylcycloprapancarboxylate] agent, cycloprotoline [Chemical name: (RS) -α-]
Cyano-3-phenoxybenzyl = (RS) -2,2-
Dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate].

The amount of the synthetic pyrethroid coated on the seeds of the cruciferous crop for increasing the yield of rhizomes sown in a unit area depends on the amount of the unit area required for controlling the main pest for controlling the synthetic pyrethroid. When the amount applied is 5 to 25% by weight, preferably 10 to 20% by weight, the effect of increasing the yield of the rhizome can be exhibited.

The synthetic pyrethroid of the seeds of the cruciferous crop for increasing the yield of the rhizome of the present invention may be coated on the surface of the seeds of the cruciferous crop without the use of the following adhesive resin. For example, a synthetic pyrethroid itself or an agricultural emulsion, a wettable powder, a powder or a suspension containing the synthetic pyrethroid as it is or diluted with water, and mixed with a brassica crop seed in an application amount that can be expected to increase the yield of the rhizome. Then there is a method of coating. However, since these methods are not firmly adhered to the surface of the seeds of Brassicaceae crops coated with the synthetic pyrethroid, the seed surface may not be uniformly coated due to the drop of the synthetic pyrethroid component from the surface, and thus stable. The effect of increasing the yield cannot be expected, and there is a possibility that problems such as hand contamination during hand sowing may occur.

(Regarding Adhesive Resin Layer) The adhesive resin layer of the seeds of cruciferous crops for increasing yield of rhizome of the present invention is a synthetic pyrethroid or an agrochemical formulation containing the same, and, if desired, a surfactant and / or an inorganic auxiliary agent. It is formed by coating the surface of seeds of cruciferous crops with an aqueous solution of an adhesive resin containing, followed by forced drying or air drying to form a film. The adhesive component of the adhesive resin aqueous liquid that coats the surface of seeds of cruciferous crops is
One or more components of a water-insoluble or water-soluble adhesive resin, or one or more components of a water-soluble adhesive resin and one or more components of a water-insoluble resin. In the present specification, the water-insoluble resin means a water-insoluble or water-insoluble resin. And the water-insoluble resin is generally derived from an aqueous emulsion of a water-insoluble or poorly water-soluble resin.

(Compatibility and Suspension Stability of Adhesive Resin Aqueous Liquid with Synthetic Pyrethroid or Synthetic Pyrethroid Preparation) Water-insoluble adhesive resin aqueous solution having compatibility and suspension stability with synthetic pyrethroid or synthetic pyrethroid preparation An emulsion (so-called "coating material") and / or a water-soluble adhesive liquid (so-called "paste = paste") is used as a component of the adhesive resin aqueous liquid for forming the adhesive resin layer of the seed of the present invention. used. This adhesive resin aqueous solution is a synthetic pyrethroid or synthetic pyrethroid preparation (wettable powder, emulsion, aqueous flowable, oily flowable in a broad sense, various suspensions such as capsule suspension, granule wettable powder, oil), interface It is required to be well mixed with the activator and the mineral auxiliary and be inactive with the synthetic pyrethroid.

There is a method in which the adhesive resin powder is mixed with the synthetic pyrethroid or its formulation, the surfactant and the powder of the inorganic auxiliary agent in place of the aqueous solution of the adhesive resin, and the seeds of the cruciferous crops are coated with the adhesive resin powder. However, although it is not recommended, it can be mixed and coated with the seeds of Brassicaceae and used as a subject of the present invention.

(Coating Amount of Adhesive Resin on Brassicaceous Crop Seed) The amount of the adhesive resin used does not have an adverse effect on the seeds, and the amount of the adhesive resin is excessive during the operation of the coating device of the adhesive resin liquid described later on the seeds. Adhesion of adhesive resin inside the container,
It can be determined by comprehensively judging the avoidance of multiple adhesion of the coated seeds, the absence of peeling of the outer cover during the coating operation, etc. When the adhesive resin is used, it is 0.1 ~ 50g, preferably 1-20g (dry weight)
Is.

(Example of Adhesive Resin) (1) Aqueous Emulsion of Water-Insoluble or Slightly Soluble Adhesive Resin The water-insoluble adhesive resin is commercially available as an aqueous emulsion or powder. The chemical structures of these resins and brands depending on the degree of polymerization of each of these resins are diverse. These can be used individually or as a mixture with each other. The adhesive resin that can be used for the root crop yielding cruciferous crop seed of the present invention is one that is harmless to the cruciferous crop, for example, a vinyl acetate-based copolymer resin, such as vinyl acetate and acrylic,
VeoVa [Veova = V inyl E ster O f
V asatic A cid: has a strength equivalent to that of vinyl acetate, which has excellent performance. Developed by Shell: R ₁
R ₂ R ₃ C-COOCH = CH ₂ (R _1, R ₂ and R ₃ = lower alkyl group)], ethylene or a copolymer resin of ethylene and vinyl chloride.

Further, even if it is a natural one, if it is produced as an aqueous emulsion which does not dissolve in water, it can be used alone or in combination with a synthetic adhesive, or in addition, a rubber latex (SBR latex) called neoprene can be used alone or in combination. It doesn't matter. The degree of polymerization of these water-insoluble or sparingly water-soluble adhesive resins is usually such that they can function as a paint, and the formed adhesive resin layer is solid to a certain extent.

Specific examples of the adhesive resin component in the aqueous emulsion of the water-insoluble adhesive resin are shown below, but are not limited thereto: As a vinyl acetate copolymer resin, for example, a vinyl acetate acrylic copolymer resin, Vinyl acetate vinyl copolymer resin, vinyl acetate maleate copolymer resin, vinyl acetate ethylene copolymer resin, vinyl acetate ethylene vinyl chloride copolymer resin; other copolymer resins such as acrylic styrene copolymer resin, acrylic copolymer resin, poly Vinyl acetate resin.

(2) Water-Soluble Resin Specific examples of the water-soluble resin used in the present invention are given below, but the invention is not limited thereto. Cellulose derivative: Non-ionic substance obtained by subjecting cellulose (pulp) to caustic soda treatment as a raw material, and then reacting it with an etherifying agent such as methyl chloride, ethylene oxide, propylene oxide or monochloroacetic acid. Is a water-soluble cellulose ether. Further, specifically, methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose.
(HPC), hydroxyethylmethyl cellulose (H
EMC), hydroxypropyl methylcellulose (HP
MC), sodium salt of carboxymethyl cellulose (Na-CMC) and the like.

Polyvinyl alcohol (PVA): A product having a degree of polymerization of 500 to 2000 and a degree of saponification of 70 to 99% is suitable, but the degree of polymerization is 1000 to 1500 in terms of adhesion and flexibility of the coating. The partially saponified type is more preferable.

Others: Polyvinylpyrrolidone: a polymer of N-vinyl-2-pyrrolidone (molecular weight 10,000 to 700,000).

The adhesive resin aqueous solution of the present invention is chemically stable even when it is coated on cruciferous crop seeds, and does not decompose the components contained therein, particularly synthetic pyrethroids, and is dispersed in accordance with the evaporation of water. Particles are connected and fused with each other. Then, a film in which the synthetic pyrethroid is melted or suspended is formed in the fusion, and the seeds of Brassicaceae crop seeds are uniformly or intermittently coated, for example, in a mottled or spotted manner.

(Surfactant) A nonionic surfactant is suitable as a surfactant which is optionally contained in the adhesive resin layer of the seeds of the cruciferous crop for increasing the yield of rhizome of the present invention. Of these, the polyoxyethylene adduct group is preferred.
It is desirable that the number of moles of the added ethylene oxide is 6 to 22 and the HLB is in the range of about 4 to 18. Higher fatty acid sorbitan, higher fatty acid polyethylene glycol
And polyglycerin fatty acid ester are also useful. In addition to this, an anionic surfactant is also useful, but since it can destabilize the emulsion of the synthetic pyrethroid, the water-insoluble adhesive resin aqueous emulsion, and / or the water-soluble adhesive resin aqueous liquid, it can be used at this point. Requires consideration.

Specific examples of the surfactant are shown below, but not limited thereto: (Specific examples of the nonionic surfactant) An etherified compound of polyethylene glycol, for example, polyethylene glycol = octylphenyl ether, Polyethylene glycol = nonylphenyl ether, polyethylene glycol =
Higher alkyl (C ₁₆ ) ether, polyethylene glycol = higher alkyl (C ₁₁ ) ether, polyethylene glycol = higher alkyl (C ₈ ) ether, monooleic acid = polyoxyethylene sorbitan, monostearic acid = poly Oxyethylene sorbitan and monolauric acid =
Polyoxyethylene sorbitan; an ester compound of polyethylene glycol, such as polyethylene glycol dioleate, polyethylene glycol distearate,
Polyethylene glycol dilaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol monostearate;
Higher fatty acid esters of sorbitan, such as sorbitan trioleate, sorbitan monooleate, sorbitan monostearate, sorbitan monolaurate; polyglycerin fatty acid esters.

(Specific Examples of Anionic Surfactant) Sulfate ester alkali salt such as sodium salt, for example, higher alcohol sulfate alkali salt such as sodium salt, higher alkyl ether sulfate alkali salt such as sodium salt, alkylbenzene sulfonate alkali Salts such as sodium and calcium salts; polyoxyethylene higher alkyl ether phosphate alkali salts, such as sodium salts.

(Surfactant Content) The usual content of the surfactant is 0 per 1 kg of the cruciferous crop used.
~ 20g.

(Effect of Containing Surfactant) The surfactant contained in the aqueous solution of the adhesive resin used in the present invention makes the synthetic pyrethroid contained in the aqueous solution into a stable emulsion or suspension. Function as an emulsifying material. When the synthetic pyrethroid preparation added to the adhesive resin aqueous solution used in the present invention is a wettable powder, a mineral substance in the wettable powder that occurs during the coating of the adhesive resin aqueous liquid of the Brassicaceae crop seeds ( It is also effective for preventing the peeling of the seed shell caused by the rubbing phenomenon caused by one of the below-mentioned inorganic auxiliaries) and for promoting the adhesion of the synthetic pyrethroid to the surface of the seeds of Brassicaceae crops. Further, the mixed composition of the polyoxyethylene adduct group enhances the mutual affinity of each component in the adhesive resin aqueous liquid, and promotes uniform dispersion of the synthetic pyrethroid.
It also allows the release of the synthetic pyrethroid from the adhesive resin layer at an appropriate rate.

(Inorganic Auxiliary Agent) The inorganic auxiliary agent, which is optionally contained in the adhesive resin layer of the seeds of cruciferous crops for increasing the yield of rhizome of the present invention, is generally an inorganic surface modifier for covering seed products and concealing agent. It is an auxiliary agent used as a material, a protective wall material, and a thickening material (pelletizing material). These inorganic auxiliaries are added to the adhesive resin aqueous liquid as fine powder. Of these inorganic auxiliaries, those having a pH of 5 to 9 composed of naturally occurring mineral substances and / or synthetic mineral substances (including calcined products) are preferable. A substance having high adsorptivity is not preferable because it may have a secondary action (decomposition, inactivation) on the synthetic pyrethroid.

(Specific Examples of Inorganic Auxiliary Agent) Specific examples of the inorganic auxiliary agent added to the aqueous adhesive resin liquid are shown below, but the invention is not limited thereto. Sericite minerals, alumina, titanium oxide, iridin (titanium oxide coated mica) clay, talc, diatomaceous earth, kaolin, bentonite, illite, halosite, pearlite, vermiculite, zeolite,
Calcium sulfate, calcium carbonate, calcium silicate, magnesium silicate, silica flower, activated clay,
Acid clay, iron oxide, activated carbon.

(Content of Inorganic Auxiliary Agent) The amount of the inorganic auxiliary agent contained in the adhesive resin aqueous solution is 1
It is usually 0 to 20 g per Kg.

(Effect of Incorporating Inorganic Auxiliary Agent) A synthetic pyrethroid preparation added to an aqueous solution of an adhesive resin may be an oily substance other than a surfactant, for example, a potency enhancing oil agent, an oily substance for stabilizing a synthetic pyrethroid, In the case of an emulsion or suspension containing a capsule forming agent or the like, this causes "stickiness" on the surface of the seeds of the cruciferous crop for increasing the yield of the rootstock of the present invention.
This "stickiness" is eliminated by adding an inorganic auxiliary agent,
It gives a "feeling" of the surface of the seeds of cruciferous crops for increasing the yield of rhizomes. On the other hand, when the formulation of the synthetic pyrethroid added to the adhesive resin aqueous solution is a wettable powder containing an inorganic auxiliary agent, the amount of the inorganic auxiliary agent newly added is not added or relatively. A small amount is enough.

(Dye) The pigment of the seeds of the cruciferous crop for increasing the yield of the rhizome of the present invention is not essential for the constitution of the present invention. However, the production of cruciferous crop seeds for increasing the rhizome of the present invention,
When sold, transported, stored and used, minimal coloring is required to ensure that it is not used as food or feed. Suitable dyes are azo lakes and insoluble azo compounds. These pigments are non-toxic to cruciferous crop seeds, and the amount added should be sufficient to provide discrimination to avoid misuse for other purposes.

Specific examples of the above dyes are as follows: Azolake compounds, for example, Brilliant Carmine 6B (No. 158)
50) and Liquid C (No. 15585); insoluble azo compounds such as Pigment Red 112, Pigment Yellow-74 and Pigment Bull-25.

Suitable synthetic pyrethroids as defined above, or synthetic pyrethroid preparations which may also contain surfactants and / or mineral assistants, and optionally freshly added surfactants as described above and / or Alternatively, an inorganic auxiliary agent (and a pigment) is added to an appropriately selected aqueous solution of the above-mentioned adhesive resin and sufficiently mixed to form an adhesive resin layer of the seeds of Brassicaceae crops for increasing rootstock yield of the present invention. An aqueous adhesive resin liquid containing a synthetic pyrethroid for forming and optionally a surfactant and / or an inorganic auxiliary is prepared.

The order of addition of the respective components to be added to the aqueous adhesive resin liquid as a raw material may be arbitrary. However, stirring is performed sufficiently so as not to destroy the physical form of the aqueous adhesive resin liquid, for example, the emulsion system. It is preferable to add while.
The addition may include, for example, a synthetic pyrethroid in the form of a liquid or fine powder or a surfactant and / or an inorganic auxiliary agent, which may be added to an adhesive resin aqueous liquid diluted or not diluted with water. The pyrethroid preparation is added dropwise or injected under stirring. In this case, if desired, the newly added surfactant and / or inorganic auxiliary agent (and dye) may be added before, during or after the addition of the synthetic pyrethroid or the preparation thereof, or to the synthetic pyrethroid preparation. It may be added in advance.

The mixing temperature may be a normal outside air temperature, for example, within the range of 0 to 40 ° C., but it does not damage the physical state of the adhesive resin aqueous liquid, and the added synthetic pyrethroid or the formulation thereof adheres. It is preferable to add it at a temperature at which it is sufficiently miscible with the aqueous resinous liquid.

Thus prepared adhesive resin aqueous liquid (adhesive resin aqueous liquid and synthetic pyrethroid or its formulation,
A mixture of a surfactant and an inorganic auxiliary agent) is applied to the seeds of cruciferous crops to produce the seeds of cruciferous crops of the present invention for increasing the yield of rhizomes. The coating method is a conventional method. For example, there is a method of drying by directly spraying the above-mentioned adhesive resin aqueous liquid on the seeds of a cruciferous crop that are being stirred, or by dripping on a rotating disc and horizontally spraying by a centrifugal force to apply and dry. is there.

The formation temperature of the adhesive resin layer is a temperature that is sufficiently high to evaporate water, which is the solvent in the aqueous adhesive resin solution, and does not adversely affect the components contained and the Brassicaceae crop seeds. I just have to. It is usually 20 to 70 ° C, preferably 20 to 40 ° C. The speed at which the seeds of the family Brassicaceae are agitated during the formation of the coating film of the adhesive resin aqueous solution needs to be appropriately adjusted so as not to damage the seeds.
In order to expedite the drying of the coating film of the adhesive resin aqueous liquid, ordinary air or warm air may be forcedly blown into the above-mentioned crucifer seed agitator.

(Formulation Device and Operation) The seeds of the cruciferous crop for increasing the yield of the rhizome of the present invention may be produced by a conventional seed coater. Examples of the mass production device include a seed disinfection device manufactured by Japan Vehicle Co., Ltd. and a Gustavson type device. The apparatus described in the examples below is of experimental scale and is of the Hans-Ulrich Hege (West-Germany) type HEG.
It is E-11 (Seed Dresser). Containers for coating operation of this device (3 types of 1, 7, 15 L) are
It is a bowl type with a smooth inner surface, and the concave lower half rotates (2800 rpm) together with the middle disk below. When rotated, the seed in the container rises to the middle of the inner wall. There is a disk in the center of the middle position and it is rotating (2800 rpm). The above-mentioned synthetic pyrethroid or its preparation, and an aqueous adhesive resin solution containing a surfactant and an inorganic auxiliary agent are dropped therein. The above-mentioned dripping aqueous liquid instantaneously scatters horizontally due to centrifugal force, and covers the Brassicaceae crop seeds that are translocated along the inner wall of the rotating container. The cruciferous crop coated with the above-mentioned aqueous adhesive resin liquid is dried at 10 to 70 ° C. or air-dried in the spread state to form a resin layer.

Thus, the resin layer of the seeds of the cruciferous crop of the present invention coated with the adhesive resin aqueous liquid can be easily formed. Further, since aggregates are not formed and the thickness of the resin layer is likely to be uniform, it is suitable for use in a direct seeding spreader, and the yield is extremely high at 100%.

Since the adhesive resin layer containing the synthetic pyrethroid adheres to the seed surface in the thus-produced seeds of the cruciferous crop of the present invention for increasing the rhizome yield, the synthetic pyrethroid drops off from the seed surface. Therefore, the distribution of the synthetic pyrethroid does not become nonuniform. Then, at the time of sowing, it is possible to avoid instability of the yield-increasing effect due to uneven distribution of the synthetic pyrethroid and scattering to neighboring cultivated land due to occurrence of chemical damage and dropout. As a result, it is possible to avoid phytotoxicity of crops that are likely to cause phytotoxicity due to synthetic pyrethroids in the vicinity of cultivated land, adverse effects on fish, and adverse effects on silkworms due to contamination of synthetic pyrethroids on mulberry crops for silkworm feed. Since the synthetic pyrethroid is contained in the adhesive resin layer,
Avoids contamination of hands when sowing and machinery when sowing. Further, by appropriately mixing and using the water-insoluble resin and the aqueous solution resin, the elution of the adhesive resin layer on the seed surface can be appropriately adjusted, and along with this, the elution of the synthetic pyrethroid contained in the adhesive resin layer can be performed. The speed can be adjusted appropriately.
Further, when a suitable amount of the surfactant and the inorganic auxiliary agent are used, the Brassica family crop seeds for increasing the rhizome of the present invention are free-flowing and easy-to-flow seeds, so that the flow in the mechanical seeding machine is smooth. Therefore, uniform mechanical seeding is possible, and the number of seeds per unit area can be strictly adjusted. As described above, the seeds of cruciferous crops for increasing the yield of rhizomes of the present invention can be appropriately adjusted in their component ratios according to their use, and are therefore suitable for sowing by seeding and mechanical sowing.

[0039]

The present invention will be described in more detail by way of examples, which should not be construed as limiting the present invention. (Applications for all Examples) (Note) (1) The coating solution is a composition solution containing no pyrethroid component. (2) The coating liquid means a liquid containing a synthetic pyrethroid or a preparation thereof in a coating liquid. (3) The coating amount of pyrethroid component in the product (pyrroidoid-coated Brassicaceae crop seed) is shown as the target value per 1 kg. (4) Parts and% are shown in parts by weight and% by weight, respectively.

Example 1 As a permethrin-coated radish seed synthetic pyrethroid preparation, 20% emulsion of permethrin (commercially available) (containing a surfactant), water-insoluble ethylene vinyl acetate copolymer resin aqueous emulsion (hereinafter referred to as ethylene) Permethrin-coated blue neck total thick radish seeds using a mixed solution of a vinyl acetate solution) and an aqueous polyvinyl acetate resin emulsion (hereinafter referred to as polyvinyl acetate solution) as a coating solution:

Seed: 40 g of blue-neck grossly thick radish seed [screened product: 8 mesh (2.38 mm) or more] was used.

[Table 1]

0.5 g of water and 20% permethrin emulsion.
After mixing 6 g, 2 g of the coating liquid shown in Table 1 was added to prepare a coating liquid. Internal volume 1 of the above-mentioned HEGE-11
Into a L container, 40 g of seeds were charged, and while the lower half of the container and the central disk in the middle of the container were rotated (2800 rpm), the above coating solution was added dropwise for about 3 minutes, and further about 4
Dry at 0 ° C. for 15 minutes with continued rotation of the bottom concave half of the container. 40.2 g of permethrin-coated blue-neck gross fat radish seeds containing 3 g of permethrin per kg of seeds were obtained. The resulting coated radish seeds were granules that were not agglomerated with each other, and were observed to be uniformly coated, and were free flowing.

Example 2: Permethrin-coated radish seeds Permethrin 20% wettable powder (commercially available) (containing no surfactant), a mixture of water-insoluble ethylene vinyl acetate solution and polyvinyl acetate solution was used as a coating solution. Used permethrin-coated blue-neck gross fat radish seeds: Seed: blue-neck gross fat radish seeds (sieve: 8 mesh or more)
40 g was used.

[Table 2]

After mixing 1.2 g of water and 0.6 g of 20% permethrin wettable powder, the coating liquid 2.2 shown in Table 2 was obtained.
Was added to prepare a coating solution. In the same manner as in Example 1,
40 g of seeds were placed in a 1 L container and rotated, and the coating liquid was dropped on a rotating disk. The obtained wet product is further heated to about 40 ° C.
For 15 minutes to dry while continuing to rotate the lower concave half of the container. 40.7 g of coated blue-neck total thick radish seeds containing 3 g of permethrin per kg of seeds were obtained. The resulting coated radish seeds were granules that were not agglomerated with each other, and were observed to be uniformly coated, and were free flowing.

Example 3: Permethrin-coated four season fired small turnip
Seed Permethrin 20% emulsion (containing surfactant), water-insoluble mixed solution of ethylene vinyl acetate solution and polyvinyl acetate solution as a coating solution Permethrin-coated Shiki-maki Kobubu Seed: Seed: Shiki-maki small Turnip seeds [Screened product: 12 mesh (1.
4 mm) or more] 40 g was used. After mixing 0.5 g of water with 0.6 g of 20% permethrin emulsion, the first of Example 1
A coating solution was prepared by adding 2.2 g of the coating solution shown in the table.
In the same manner as in Example 1, 40 g of seeds were placed in a 1 L container and rotated, and the coating liquid was dropped on a rotating disc. The resulting moist product was further dried at about 40 ° C. for 15 minutes while continuing to rotate the lower concave half of the container. Coated four season sowing small turnip seeds 40.2 containing 3 g of permethrin per 1 kg of seeds
g was obtained. The obtained coated Shiki-maki small turnip seeds were granules that were not aggregated with each other and were observed to be uniformly coated, and flowed smoothly.

Example 4: Permethrin-coated four season firewood turnip
Seed permethrin 20% wettable powder (without surfactant), water-insoluble mixture of ethylene-vinyl acetate solution and poly-vinyl acetate solution as a coating solution Permethrin-coated Shiki-maki small turnip seeds: Seed: Shiki-maki Small turnip (separated product: 12 mesh or more) 40
g was used. Water 1.8 g and permethrin wettable powder 0.6
After mixing g, 2 g of Table 2 coating solution of Example 2 was added to prepare a coating solution. In the same manner as in Example 1, 40 g of seeds were placed in a 1 L container and rotated, and the coating liquid was dropped on a rotating disc. The resulting moist product was further dried at about 40 ° C. for 15 minutes while continuing to rotate the lower concave half of the container. 40.7 g of coated four season sowing small turnip seeds containing 3 g of permethrin per 1 kg of seeds were obtained. The obtained coated Shiki-maki small turnip seeds were granules that were not aggregated with each other and were observed to be uniformly coated, and flowed smoothly.

Example 5: Cypermethrin-coated four seasons small
Turnip seed cypermethrin 6% emulsion (commercially available) (containing a surfactant), a water-insoluble mixture of ethylene vinyl acetate solution and polyvinyl acetate solution, used as a coating solution. Seeds: Seeds: Four season firewood small turnip seeds (separated product: 12 mesh or more)
40 was used.

After mixing 0.5 g of water and 0.67 g of a 6% cypermethrin emulsion (commercially available product) (containing a surfactant), the coating liquid shown in Table 1 of Example 1.2. A coating solution was prepared by adding 2 g. 1L as in Example 1
40 g of seeds were placed in a container and rotated, and the coating liquid was dropped on a rotating disk. The obtained wet product is further subjected to 1 at about 40 ° C.
It was dried while continuing to rotate the lower concave half of the container for 5 minutes. 40.14 g of coated four season sowing small turnip seeds containing 1 g of cypermethrin per 1 kg of seeds were obtained. The obtained coated Shiki-maki small turnip seeds were granules that were not aggregated with each other and were observed to be uniformly coated, and flowed smoothly.

Example 6: Cypermethrin-coated four seasons small
Cypermethrin-coated Shiki-maki using 6% wettable powder of turnip seed cypermethrin (commercially available product) (containing no surfactant) and a mixture of water-insoluble ethylene vinyl acetate solution and polyvinyl acetate solution Small turnip seeds: Seeds: Four seasons firewood small turnip seeds (screened product: 12 mesh or more)
40 g was used.

After mixing 1.8 g of water and 0.67 g of cypermethrin 6% wettable powder, 2.2 g of the coating liquid of Example 2 and Table 2 was added to prepare a coating liquid. In the same manner as in Example 1, 40 g of seeds were placed in a 1 L container and rotated, and the coating liquid was dropped on a rotating disc. The resulting moist product was further dried at about 40 ° C. for 15 minutes while continuing to rotate the lower concave half of the container. 40.8 g of coated four season sowing small turnip seeds containing 1 g of cypermethrin per 1 kg of seeds were obtained. The obtained coated Shiki-maki small turnip seeds were granules that were not aggregated with each other and were observed to be uniformly coated, and flowed smoothly.

Example 7: Permethrin-coated red turnip seeds A 20% emulsion of permethrin (commercially available product) (containing a surfactant) and a mixture of water-insoluble ethylene vinyl acetate solution and polyvinyl acetate solution were used as coating solutions. Permethrin-coated red turnip seeds used: 40 g of seed: red turnip (spa-kla) seeds [sieved product: 8.6 mesh (2 mm) or more] was used.

0.5 g of water and permethrin 20% emulsion 0.
After mixing 6 g, 2 g of Table 1 coating solution of Example 1 was added to prepare a coating solution. In the same manner as in Example 1, 40 g of seeds were placed in a 1 L container and rotated, and the coating liquid was dropped on a rotating disc. The resulting moist product is further heated at about 40 ° C for 15
It was dried while continuing to rotate the lower concave half of the container for a period of time. 40.25 g of coated red turnip seeds containing 3 g of permethrin per 1 kg of seeds were obtained. The obtained coated red turnip seeds,
The granules were observed to be uniformly coated, not agglomerated with each other, and were free flowing.

Test Example 1: Greenhouse pot test Cultivation condition: 500 ml of soil mixed with 0.75 g of chemical fertilizer (5.5.0.) Was placed in a pot having a diameter of 12 cm and a depth of 10 cm, and the pyrethroid of the example shown in Table 3 was added. Two coated seeds were brought into close proximity and seeded at three locations. After 10 days, one thinning point is used for each location, and three locations are used for a total of three locations. 0.33 mg of the chemical fertilizer per pot is dissolved in 50 mL of water, and top fertilization is applied to the pot. After 23 days, the fresh weight of the rhizome is measured and compared. did. Seeds: Coated Shiki-maki small turnip seeds, Pot number: 15 pots per ward, Harvest measurement sphere number: Top 42 spheres, Untreated group: Synthetic pyrethroid and adhesive resin-free seeds were used.

[0054]

[Table 3] The test results show that the coated synthetic pyrethroid has a remarkable root-root increasing effect.

Test Example 2: Field test Cultivation conditions: According to the autumn radish cultivation customary practice, a cultivation test was carried out using synthetic pyrethroid-coated blue-neck total thick radish seeds and untreated seeds thereof. The test conditions are as follows: Cultivation scale: 1 plot, 1 row (row width 60 cm, 1 row planted, 3 between plants)
0 cm, 20 stocks) Consecutive: 1 sample, 3 consecutive stocks Total = 60 Untreated group: Both adhesive resin and synthetic pyrethroid are not coated. Comparative example: 0.5 g of a crushed product of permethrin 0.1% granules (gard bait A) was applied to each germinated strain at the source (the amount of permethrin used in this comparative example was the reference value below). As is clear from the calculation of the above, the amount is about 9.8 times that in the case of permethrin being coated.) Treatment of seed dressing: Pyrethroid-coated seeds, control untreated plots and synthetic pyrethroids of comparative examples. Seeds not coated with any of the adhesive resins were dressed with orthoside. Number of seeds: 1 seed of permethrin-coated seed of Example 1 / planting seed, 2 seeds of untreated section (uncoated with synthetic pyrethroid) and seed of comparative example (uncoated) Thinning / planting seeding thinning: After seeding 15 days Yield survey: 58 days after sowing

The amount of synthetic pyrethroid used per strain of blue-necked gross radish was calculated according to the following order of reference values.
According to this, the use amount of the comparative example group in which the permethrin 0.1% granule was mixed with soil was about 9.8 times the use amount of the coated seed of Example 1.

[Table 4]

The results of the yield investigation are shown in Table 4.

[Table 5]

The seeds coated with permethrin showed a remarkable effect of increasing rootstock production as compared with the untreated plot. The yield-increasing effect of the root-root portion of the comparative example plot containing soil mixed with permethrin per unit area of about 9.8 times that of the covering treatment was slight and not remarkable as compared with the case of seed-covering. It is clear from this that the effect of the coating treatment with the adhesive resin containing the synthetic pyrethroid is remarkable.

[0060]

EFFECTS OF THE INVENTION When seeds of cruciferous crops are coated with synthetic pyrethroids in an amount of about 10 to 20% of the usual amount used for insecticidal purposes, the effect of increasing the rhizome is exhibited. When the adhesive resin layer containing the synthetic pyrethroid is coated on the surface of the seeds of the cruciferous crop, the adhesive resin layer containing the synthetic pyrethroid adheres to the seed surface, and the synthetic pyrethroid falls off the seed surface and the distribution of the synthetic pyrethroid is observed. Will not be uneven. Further, at the time of sowing, it is possible to avoid instability of the yield-increasing effect due to uneven distribution of the synthetic pyrethroid, phytotoxicity, and scattering to the adjacent cultivated land due to the loss of the synthetic pyrethroid. As a result, it is possible to avoid phytotoxicity of crops that are likely to cause phytotoxicity due to synthetic pyrethroids in the vicinity of cultivated land, adverse effects on fish, and adverse effects on silkworms due to contamination of synthetic pyrethroids on mulberry crops for silkworm feed. Since the synthetic pyrethroid is contained in the adhesive resin layer, it is possible to avoid contamination of the hand when sowing and the machine when sowing the machine. or,
By appropriately mixing and using the water-insoluble resin and the aqueous solution resin, the elution of the adhesive resin layer on the seed surface can be appropriately controlled, and along with this, the elution rate of the synthetic pyrethroid contained in the adhesive resin layer can also be adjusted. It can be adjusted appropriately. Further, when a suitable amount of the surfactant and the inorganic auxiliary agent are used, the Brassica family crop seeds for increasing the rhizome of the present invention are free-flowing and easy-to-flow seeds, so that the flow in the mechanical seeding machine is smooth. Therefore, uniform mechanical seeding is possible, and the number of seeds per unit area can be strictly adjusted. As described above, the root crop yielding cruciferous crop seed of the present invention has an unprecedented rootstock yield increasing effect, and at the same time, its component ratio can be appropriately adjusted according to its use, sowing by hand and by mechanical sowing. Suitable for

Claims (6)

[Claims] 1. A Brassicaceae crop seed having a seed surface coated with a synthetic pyrethroid. 2. The seed of the family Brassicaceae according to claim 1, wherein the amount of the synthetic pyrethroid coated on the seed surface is 5 to 25% by weight of the amount used for controlling the main pests. 3. The Brassicaceae crop seed according to claim 1, wherein the seed surface is covered with an adhesive resin layer containing a synthetic pyrethroid. 4. The Brassicaceae crop seed according to claim 3, wherein the adhesive resin layer contains a surfactant and / or an inorganic auxiliary agent in addition to the synthetic pyrethroid. 5. The Brassicaceae crop seed according to claim 1, 2, 3 or 4, wherein the synthetic pyrethroid is cypermethrin and / or permethrin. 6. The cruciferous crop seed according to claim 1, 2, 3, 4 or 5, wherein the crop seed is radish, white turnip or red turnip.