KR20090009115A - Physical control agents and control method from water-soluble polymer against small-size insect pests - Google Patents

Abstract

A physical insecticidal composition against small-size insects by using water-soluble polymer is provided to eliminate or minimize the use of conventional chemical insecticides, improve the insecticidal effects, avoid the growth inhibition of crops, and remove the remaining insecticide with water. The physical insecticidal composition against small-size insects comprises 0.001-5.0 wt.% of the water-soluble polymer which is dissolved in water, and segregated as film as the water is vaporized, and 0.0001-2.0 wt.% of surfactant dissolved in water, wherein the surfactant is the ampholytic surfactant.

Description

Physical control agent and control method of micro pests using water-soluble polymer {PHYSICAL CONTROL AGENTS AND CONTROL METHOD FROM WATER-SOLUBLE POLYMER AGAINST SMALL-SIZE INSECT PESTS}

The present invention relates to a physical control agent for micro pests and a method for controlling micro pests using the same.

Crops refer to plants that colonize and grow under human protection and management, and include ornamental crops such as flowers in addition to edible crops such as various vegetables. Crops are cultivated in facilities such as plastic houses to control their shipping time, as well as in open areas.In order to increase crop yield and improve quality, crops are used in the nervous system of micropests such as carbamate insecticides, organophosphorus insecticides and pyrethroid insecticides. The use of various pesticides leading to insecticidal action has been applied to control micropests of crops.

For example, Japanese Patent Application Laid-Open No. 1989-228903 discloses insecticides, fungicides, herbicides, etc., in which polymers such as vinyl acetate polymers and ethylene-vinylacetate copolymers having high adhesive properties are generally used so that pesticides may exhibit residual activity. The technique which emulsifies and mixes in the aqueous solution of is disclosed.

WO 2004/077947 also discloses a method for controlling the release of pesticides by preparing solid control agents by coating solid pesticides such as insecticides, fungicides, herbicides with thermoplastic polymers.

The polymer applied to the above-described techniques only functions as an adhesive or coating agent of the pesticide, which is different from the physical control function of the present invention, and the control of the micropest is made by the pesticide component. Therefore, the use of such pesticides adversely affect the human body and the environment, such as the control and consumer, and causes problems such as increased resistance of micropests to pesticides, major pests of potential pests, and increased control costs.

As interest in the side effects of such synthetic pesticides is increasing, consumers have recently avoided the consumption of edible fruits and vegetables, such as cucumbers, tomatoes, and peppers, in which pesticides may remain. Attempts have been made to use various pesticides of natural pesticides in order to solve these problems, but there are problems such as limited pesticide effects and excessive control costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a physical control agent of a micropest having a good insecticidal effect and a control method using the same while excluding or minimizing a conventional chemical pesticide used to control micropests affecting crops.

Another object of the present invention is to provide a cost effective physical control agent for micro pests and a control method using the same, which does not inhibit the growth of the crop and can easily remove the control components remaining in the crop with water.

The physical control agent of the micropest according to the present invention is water; A water-soluble polymer that is dissolved in the water and precipitates onto a film as the water is vaporized; And surfactants dissolved in the water.

Since the physical control agent of the sprayed micropest is a viscous polymer solution, it adheres to the wings or legs of the micropest parasitic in the crop, thereby physically slowing the movement. The surfactant dissolved in the control agent increases the adsorption power of the control agent on the skin of the micropest. As the water in the control agent adhering to the micropest vaporizes, the water-soluble polymer dissolved in the water precipitates in the form of a film, so that the flying or walking of the micropest is not smooth and eventually leads to pesticides.

In the physical control agent of the micropest according to the present invention, the water-soluble polymer is precipitated in the form of a film as the water in the control agent is vaporized to perform the function of preventing the emergence or walking of the micropest smoothly. If the polymer is a natural polymer, a semi-synthetic polymer, synthetic polymers, etc. can all be used, it is preferable to include a monomer unit having a quaternary ammonium group or tertiary amino group to simultaneously exhibit the effect of controlling microorganisms such as mold and bacteria.

In addition, in the physical control agent of the micropest according to the present invention, the surfactant may improve the adsorptive power to the micropest of the physical pesticides such as anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants Any surfactant is possible, and amphoteric surfactants are particularly suitable in view of this function.

As such, the physical control agents of the micropests according to the present invention include those of crops such as mite, aleyrodiade, thrips, aphids, leaf miners, and mealybugs. It can be used for micro pest control. These micropests cause great damage to horticulture and flower crops, especially to plants such as cucumbers, tomatoes, peppers and melons, and to field crops such as rose, gerbera, chrysanthemum, and poinsettia.

The micro pest control method according to the present invention, (S1) to prepare a physical control agent of micro pests, including a water-soluble polymer and a surfactant dissolved in water, the water is precipitated on the film as the water is vaporized. step; And (S2) spraying the micropest's physical control agent to the crop in which the micropest exists.

First, the insecticidal action of the micropest control agent according to the present invention is physically made by a water-soluble polymer having a film-forming ability, unlike a conventional insecticide, it can be excluded or minimized the use of pesticides to the insecticide by acting on the nervous system have. Accordingly, it is possible to prevent the human body harm caused by pesticides, such as the accumulation of pesticides in the crop, operator's percutaneous, oral, inhalation exposure during pesticide injection.

Secondly, the micro pest control agent according to the present invention increases the adsorption power of the control agent to the skin of the micro pests due to the addition of a surfactant, thereby improving the control effect.

Third, since the water-soluble polymer remaining in the crop after spraying the physical control agent of the micropest according to the present invention is easily removed by washing with water, it can be particularly useful as a control agent for reproductive edible crops.

Fourth, since the effective concentration of the water-soluble polymer can be lowered due to increased controllability due to the addition of the surfactant, physical control agents can be economically produced. Accordingly, it can be applied for large-scale farming, including facility house plantation.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The physical control agent of the micropest according to the present invention is water; A water-soluble polymer that is dissolved in the water and precipitates onto a film as the water is vaporized; And surfactants dissolved in the water.

Since the physical control agent of the micropest is a viscous aqueous polymer solution, when sprayed on the crop, it adheres to the wings or legs of the micropest parasitic on the crop, thereby slowing its movement. As the water in the control agent adhering to the micropest vaporizes, the water-soluble polymer dissolved in the water precipitates in the form of a film. As a result, the emergence or walking of the micropest is not smooth and eventually leads to insecticide.

In the physical control agent of the micropest of the present invention, the water-soluble polymer refers to a polymer which may exist in a state of being dissolved in water before spraying the crop through any storage or spraying device. Therefore, polymers that can be dissolved in water at room temperature, as well as polymers that dissolve in hot water at room temperature and exhibit dissolution stability in water at room temperature, and are insoluble in water, but are not soluble in water. It includes all polymers that can be dissolved in water after dissolving the polymer in an intermediate solvent such as (ethanol). Preferably, it is preferable to use a polymer that can be dissolved in water at room temperature.

In the physical control agent of the micropest according to the present invention, the content of the water-soluble polymer is precipitated in a film form as the water in the control agent vaporizes to prevent the micropest from flying or walking smoothly. It is sufficient to add to perform, the content of the water-soluble polymer can be properly adjusted according to the size and resistance of the micropest. That is, for example, the size of the aphid (Aphid) about 2mm, the size of the thrips (Thrips) about 1.5mm, the size of the Aleyrodiade about 1.2mm, the size of the worm (Mealybug) About 3mm, the size of the mite is less than 1mm, leaf oyster is about 1.6mm. Therefore, small insects such as mites can be easily controlled by relatively low concentrations of water-soluble polymer solutions, and wing movements can be easily carried out by water-soluble polymers even in the case of flyable micropests such as powder, thrush, and leaf dens. The control can be slowed down.

In view of the foregoing, a suitable content of the water-soluble polymer is, for example, 0.001 to 5.0% by weight, more preferably 0.05 to 3.0% by weight based on the total weight of the solution for control. When the content of the water-soluble polymer is less than 0.001% by weight, the physical control effect of the micropest by film formation may be lowered. If the content is more than 5% by weight, the economic efficiency of the agricultural pesticide may be lowered and the harmful effects of the crops may be reduced. Can cause.

In addition, in the physical control agent of the micropest according to the present invention, the water-soluble polymer is precipitated in the form of a film as the water in the pesticide vaporizes the function of preventing the micropest from flying or walking smoothly. Any polymer used may be used. Therefore, various kinds of water-soluble polymers such as natural polymers, semisynthetic polymers, and synthetic polymers may be used.

Natural polymers include gelatin, pectin, dextran, hyaluronic acid or salts thereof, collagen, agar, gum arabic, residue rubber, acacia rubber, karaya rubber, toragan rubber, collapsing rubber, starch, cara Ginic acid, alginic acid, sodium alginate, etc. may be used, but is not limited thereto. In particular, natural water-soluble polymers may additionally play a role as a nutrient for crops depending on the type of insecticide action.

In addition, semi-synthetic polymers include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, sodium carboxy methyl cellulose, soluble starch, dextrin ( Dextrine), carboxymethyl starch (Carboxy methyl starch), dialdehyde starch (Dialdehyde starch) and the like can be used, but is not limited thereto.

In addition, as the synthetic polymer, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methacrylate, poly acrylic acid or salt thereof, polyethylene oxide (Polyethylene oxide), Carboxy-containing acrylic resins, Carboxy-containing polyester resins, Water-soluble polyamides, Water-soluble polyurethanes, Maltodextrins, Polydextrose General purpose synthetic polymers well known for their water solubility may be used, but are not limited thereto.

In particular, it is preferable to use a water-soluble polymer including a monomer unit having a quaternary ammonium group or a tertiary amino group as the synthetic polymer. Since the polymer containing a monomer unit having a quaternary ammonium group is known to exhibit bactericidal action against mold and bacteria, the effect of controlling the fungus and bacteria when spraying the control agent of the present invention, which is used as a water-soluble polymer, on crops is also simultaneously. Can enjoy.

As a water-soluble polymer including a monomer unit having a quaternary ammonium group or a tertiary amino group, it is preferable to use a polymer including a unit polymerized with a monomer having a quaternary ammonium group or a tertiary amino group represented by the following formulas (1) and (2), respectively. It's desirable. These polymers are easily solubilized in water and have a good film-forming ability, which is suitable for exhibiting physical control effects of micropests.

In Formulas 1 and 2, R ₁ to R ₃ are each independently hydrogen, a hydroxyl group, or an alkyl group having 1 to 3 carbon atoms, X is an alkylene group having 1 to 12 carbon atoms, -COOR _7- , -CONHR _7- , -OCOR ₇ -or any one selected from the group consisting of R ₈ -OCOR _7- , wherein R ₇ and R ₈ are each independently of each other alkylene having 1 to 5 carbon atoms, R ₄ is an alkyl group having 1 to 3 carbon atoms, Hydroxyalkyl or R ₁ R ₂ C═C (R ₃ ) —X—, R ₅ is an alkyl group, hydroxyalkyl group or benzyl group having 1 to 3 carbon atoms, R ₆ is a hydroxy group, carboxyl group, sulfonic acid group, or carbonic acid It is a C1-C10 alkyl group or benzyl group substituted by the ester group. Y ⁻ represents an anionic group when R ₆ is an alkyl group, hydroxyalky or benzyl group. As an anion of Y ⁻ , a halogen ion, a sulfate ion, an alkyl sulfate ester ion having 1 to 3 carbon atoms, or an alkyl group having 1 to 3 carbon atoms is substituted. Aromatic sulfonic acid ion, hydroxy ion, etc. are mentioned. In addition, when R <_6> contains a carboxyl group, a sulfonic acid group, or a sulfuric acid ester group, Y- does not exist and R <_6> becomes an anion.

As the monomer of Formula 1, the alkyl (C1-5) -N, N, N-trialkyl (C1-C3) quaternary ammonium salt of Acryloyl or Methacryloyl , Oxyalkyl (C1-5) -N, N, N-trialkyl (C1-C3) quaternary ammonium salt of Acryloyl or Methacryloyl or N- (ω- Alkenyl (C3-10) -N, N, N-trialkyl (C1-3) quaternary ammonium salt is mentioned.

In the water-soluble polymer including a monomer unit having such a quaternary ammonium group or tertiary amino group, other monomers may be copolymerized in consideration of film forming ability, manufacturing cost, and the like.

1) acrylic acid and salts thereof, methacrylic acid and salts thereof, maleic acid and salts thereof, maleic anhydride, styrene sulfonic acid salts, 2-acrylamide-2-methyl propane sulfonic acid salts, allyl sulfonic acid salts, vinyl sulfonic acid salts, sulfopropyl methacrylic An anion group containing compound chosen from a rate.

2) acrylic or methacrylic amide, N, N-dimethyl acrylamide or methacrylicamide, N, N-dimethyl propyl acrylic acid or methacrylic acid amide, N, N-dimethyl ethyl acrylic acid or methacrylic acid amide, N, N-dimethyl ethyl acrylic acid Or an amide containing compound selected from methacrylic acid amide, N-vinyl-2-caprolactam, N-vinyl-2 pyrrolidone.

3) Ester containing compounds from acrylic acid or alkyl methacrylate (C1-20), acrylic acid or 2-hydroxyethyl methacrylate, acrylic acid (or methacrylic acid) -N, N-dimethyl alkyl (C1-5), vinyl acetate .

4) ethylene, propylene, N-butylene, isobutylene, N-pentane, isoprene, 2-methyl-1-butene, N-hexene, 2-methyl-1-pentane, 3-methyl-1-pentane, 4 -Methyl-1-pentane, 2-ethyl-1-butene, styrene, vinyltoluene, α-methyl styrene, allylamine, N, N-diallyl amine, N, N-diallyl-N-alkyl amine, ethylene oxide , An olefin compound selected from propylene oxide, 2-vinyl pyridine and 4-vinylpyridine.

On the other hand, the physical control agent of the micropest of the present invention includes a surfactant.

Insects have an exoskeleton, and the outermost epidermis of the exoskeleton acts as a barrier against foreign debris. More than about 60% of the epidermis is composed of chitin, which is a carbohydrate polymer composed of beta-1,4 bonds of N- acetylglucosamine units, and has hydrophobicity.

Therefore, the physical control agent of the present invention was added with a surfactant to increase the insecticidal power by increasing the adsorption power of the hydrophilic physical control agent to the micropest skin. As the surfactant is added, the physical control agent including the water-soluble polymer and water is well dispersed and adsorbed on the skin of the micropest, thereby increasing the physical control power. Accordingly, since the effective concentration of the water-soluble polymer in the physical control agent can be lowered, the manufacturing cost can be lowered and economical control is possible.

Surfactants can be any surfactant that can improve the adsorption capacity of microcontrollers of physical control agents such as anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants. Surfactants are suitable.

Examples of the anionic surfactant include sodium lauryl ether sulfate (SLES), sodium α-olefin sulfonate (AOS), and the like, and nonionic surfactants include alkoxypolyglyceride (APG) and cocodiethanol amine (CDE). Examples of the cationic surfactant include Esterquat (Esters of quaternized ethanolamines), IM100 (Methyl-1-palm Amido ethyl-2-palm), and CTAC (Cetrimonium Chloride) .Amphoteric surfactants include CAPB (Cocamidopropyl). Betaine), DSC (Disodium Cocoamphodiacetate), LHS (Lauryl Hydroxysultaine) and the like can be exemplified, but is not limited thereto.

Such surfactant content is preferably 0.0001 to 2.0% by weight, more preferably 0.0005 to 1.0% by weight, based on the total weight of the pesticide.

The physical control agent of the micropest according to the present invention can increase the insecticidal effect by additionally mixing a synthetic pesticide or preferably a natural pesticide, which acts on the nervous system and leads to insecticide, without limiting the object of the present invention. As a synthetic pesticide which can be used, the carbamite type, organophosphorus type, pyrethroid type, etc. which are generally used can be illustrated.

In addition, the physical control agent of the micropest of the present invention is added to the ingredients that can be a nutrient source of the crop, the components having a bactericidal action to the fungi or bacteria that may occur in the crop, without impairing the object of the present invention Of course you can.

The above-mentioned physical control agent of micro pests can control micro pests by spraying on crops in which micro pests exist by using commonly used space spraying method, and space spraying can be spray spray, mist spray, heating and ultra fine particles (ULV). ) It can be applied by a method such as haze. The water-soluble polymer remaining in the crop can be removed primarily by rain, but in the case of edible crops, the water-soluble polymer can be completely removed by washing the crop with water before eating.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Example  1 to 5

According to the composition shown in Table 1 to prepare a physical control agent in which a PVA water-soluble polymer and a surfactant dissolved.

Comparative example  One

According to the composition shown in Table 1 to prepare a physical control agent in which only the PVA water-soluble polymer dissolved.

Classification (Unit: Weight%) Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 PVA Polymer ¹⁾ 0.2 0.2 0.2 0.2 0.2 0.2 SLES ²⁾ - - 0.001 - - - APG ³⁾ - - - 0.001 - - EsterQuat ⁴⁾ - - - - 0.001 - CAPB ⁵⁾ 0.001 - - - - DSCD ⁶⁾ 0.001 - - - - water Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount

¹⁾ PVA: Polyvinyl alcohol

²⁾ SLES: Sodium Lauryl Ether Sulfate

³⁾ APG: Alkylpolyglyceride

⁴⁾ EsterQuat: Esters of quaternized ethanolamines

⁵⁾ CAPB: Cocamidopropyl Betaine

⁶⁾ DSCD: Disodium Cocoamphodiacetate

Smiling pest Insecticidal  evaluation

Using the compositions according to the above Examples and Comparative Examples was evaluated for the physical pesticides against micro pests as follows.

As disclosed in the smiled charge insects that give a serious damage to the actual greenhouse crops, pest walk to the spotted spider mite (Tetranychus urticae ) Adults, as an emergency pest, Bemisia tabaci ) Adults are used, and they are species in the lab.

Tobacco powder was transferred to the cylinder chamber 10mm in diameter and 180mm in height by using 10 brushes each. The bottom of the cylinder chamber was covered with a Petri dish lid, and the inlet was banded with a net of mosquito nets to prevent the escape of flight specimens and to control the spray. The spray of the control agent was sprayed five times toward the test insects at a distance of about 10 cm from the inlet of the cylinder chamber by applying a pump spray containing each control agent, in accordance with the spray spraying method most commonly used for controlling pests in farmhouses. .

The spotted mite was placed on a 10cm Petri dish with a 90mm filter paper, and then moved by 10 with a brush.In the same way, a pump-type spray was sprayed 5 times at a distance of 20cm so that the fillers of the test insects were evenly spread on the control agent. It was.

After spraying the control agent to the micropest, the insecticidal rate of each specimen was cumulatively examined for 1 hour and 3 hours, respectively, and all experiments were repeated three times.

   The pesticidal rate of the micro pests over time is shown in Table 2 below.

As shown in the results of Table 2, the micropest insecticidal effect was found to be Tetranychus urticae ) was higher in Bemisia tabaci , and the embodiments treated with the present invention had a higher insecticidal effect than Comparative Example 1 treated with the control agent containing no surfactant. Indicated. The insecticidal rate was increased with time, especially in Examples 1 to 2 in which CAPB or DSCD, which is an amphoteric surfactant, was added, Example 3 to which anionic surfactant, nonionic surfactant, and cationic surfactant were added, respectively. Insecticidal effect was higher than 5.

Claims (6)

water; A water-soluble polymer that is dissolved in the water and precipitates onto a film as the water is vaporized; And A physical control agent for micropests comprising a surfactant dissolved in the water. According to claim 1, wherein the content of the water-soluble polymer is a physical control agent of the micro pests, characterized in that 0.001 to 5.0% by weight based on the total weight of the control agent. The method of claim 1, wherein the content of the surfactant is a micropest physical control agent, characterized in that 0.0001 to 2.0% by weight based on the total weight of the control agent. 4. The physical control agent for micropest according to claim 1 or 3, wherein the surfactant is an amphoteric surfactant. The method of claim 1, wherein the micropest is a physical control agent of a micropest, characterized in that at least one pest selected from the group consisting of mites, powdery, whiskers, aphids, worms and leaf oysters. (S1) preparing a physical control agent of a micropest, which is dissolved in water and the water, and includes a water-soluble polymer and a surfactant that are precipitated onto the film as the water is vaporized; And (S2) A method for controlling micro pests, comprising spraying a physical control agent of the micro pests on a crop having micro pests.