JP2007176865A - Agricultural/horticultural microbicidal composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combinational composition with no such a problem that, in general, in view of the fact that increase in the absorption of a copper-based agent into plants due to mixing with other component(s) causes chemical injuries and when mixed, the stability of other active ingredient(s) and preparation-related physicochemical properties may be affected, the development of mixed preparations of the copper-related agent and such other active ingredient(s) and the establishment of mixing method are difficult, and to provide a method for controlling disease injuries using the composition. <P>SOLUTION: The agricultural/horticultural microbicidal composition comprises an inorganic copper-based agent and azoxystrobin as active ingredients. Thus, an excellent plant disease injury-controlling agent is provided based on the fact that owing to the above composition's using method, the composition exhibits excellent effects unexpected from the respective effects of the single microbicidal agent on various chemical injuries involving chemical-resistant microbes and exhibits no chemical injuries on various plants. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an agricultural and horticultural fungicide composition containing an inorganic copper agent and azoxystrobin as active ingredients and a method for using the composition as a fungicide.

Azoxystrobin is a known active ingredient of agricultural and horticultural chemicals (see, for example, Patent Document 1). Inorganic copper agents are agricultural materials that have been used for a long time, and are used as disinfectants in various situations.
It is known that mixtures of copper hydroxide and other cupric salts have a synergistic effect on certain plant diseases (see, for example, Patent Document 2).
In addition, a composition comprising a combination of a certain kind of strobilurin-based drug and a certain kind of copper agent is known (see, for example, Patent Document 3 and Patent Document 4).

Japanese Patent No. 6072140 JP 2005-51682 A JP-A-8-26912 Special table 2003-73211 gazette

  Agricultural and horticultural crop production is still severely damaged by diseases and the like, and development of new fungicides for controlling plant diseases is desired due to the resistance of microorganisms and fungi to existing drugs. Inorganic copper agents have been widely used as agricultural and horticultural fungicides because they are relatively inexpensive and effective in controlling a wide range of diseases. Since the effect of copper preparation alone is not sufficient, if the effect can be enhanced, it will lead to stabilization of crop production or reduction of the amount of chemicals used, and will contribute to reducing the burden on the natural environment. . However, in general, copper agents cause phytotoxicity when absorbed into plants by other components, and when mixed, they may affect the stability of other active ingredients and the physicochemical properties of pharmaceuticals. For this reason, it has been difficult to develop a mixed preparation with other active ingredients and establish a mixed use method, and there has been a demand for a combination composition and a disease control method free from such problems.

Azoxystrobin is a fungicide compound belonging to a strain called strobilurin or methoxyacrylate (see, for example, “Development of New Pesticides” (issued by CMC, supervised by Katsuta Ikura, 1997)). By binding to a part of the cytochrome bc ₁ complex of the membrane and inhibiting electron transfer, it has activity in a wide range of diseases. Broad bactericidal activity is one characteristic of this family of compounds. However, due to its action, it is necessary to pay attention to the occurrence of phytotoxicity to crops. In addition, a plurality of compounds of the same family are being developed and marketed as agricultural chemicals and are widely used, and there is a concern about the development of drug resistance against plant diseases in the future.

As a result of intensive investigation into the development of a drug and treatment method that exerts sufficient effects on plant diseases, the present inventors have found an agricultural and horticultural fungicide composition containing an inorganic copper agent and azoxystrobin as active ingredients. The present invention has been completed by finding that it exhibits an excellent effect that cannot be expected from the effects of each fungicide alone against a wide variety of diseases including drug-resistant bacteria and that it does not show phytotoxicity on various plants. It was.
The present invention provides an agricultural and horticultural fungicide composition having a synergistic effect and a method for using the same, characterized by containing one or more fungicides selected from inorganic copper agents as active ingredients and azoxystrobin. To do. Moreover, it is expected to prevent the development of resistance in plant pathogens by using a combination agent.

That is, the present invention
1) An agricultural and horticultural fungicide composition containing an inorganic copper agent and azoxystrobin as active ingredients 2) The inorganic copper agent is a compound of 1 or 2 selected from the group consisting of basic copper chloride and basic copper sulfate Agricultural and horticultural fungicide composition according to 1), wherein 3) the inorganic copper agent is basic copper sulfate,
4) 1) to 3) A method for using an agricultural and horticultural fungicide composition characterized by treating an effective amount of the agricultural and horticultural fungicide composition according to any one of claims 1 to 3 with a plant or a cultivation carrier,
5) Agricultural and horticultural treatment characterized in that a plant is treated at the same time with two types of diluting solutions obtained by diluting a composition containing inorganic copper as an active ingredient and a composition containing azoxystrobin as an active ingredient. Disease control methods,
6) The agricultural and horticultural disease is a drug resistant agricultural and horticultural disease, and the control method according to claim 5, and
7) Use of an inorganic copper preparation to enhance the effect of azoxystrobin on agricultural and horticultural diseases,
It is about.

  The agricultural and horticultural fungicide composition of the present invention has a synergistic control effect on various plant diseases including drug-resistant bacteria, and exhibits no phytotoxicity on various plants. Can be used as a disinfectant. Moreover, since a much higher effect than each single agent of an active ingredient is recognized, high safety | security and economical efficiency are provided by the reduction of the dosage amount to be dropped into the environment, and the frequency | count of spraying.

  Azoxystrobin, which is one active ingredient used in the present invention, can be produced by a method according to Japanese Patent No. 6072140, and can also be obtained in the form of a commercial product. Azoxystrobin belongs to a strobilurin-based drug, but has a particularly high synergistic effect in the same strain. Moreover, it is a compound which does not have a problem in combination with an inorganic copper agent also from the viewpoint of phytotoxicity, stability during preparation, and physicochemical property of preparation, and can be usefully used in the present invention.

  The inorganic copper agent as an active ingredient used in the agricultural and horticultural fungicide composition of the present invention may be an antibacterial compound containing copper ions, such as basic copper chloride, basic copper sulfate, basic carbonic acid. Examples thereof include copper, cuprous oxide, basic copper phosphate, basic copper calcium sulfate, and copper ammonium complex. Preference is given to basic copper chloride and / or basic copper sulfate. Particularly preferred is basic copper sulfate. Although the aspect of basic copper sulfate is not particularly limited, the state of Bordeaux liquid is particularly preferable.

  The Bordeaux liquid used in the present invention is also called a lime Bordeaux liquid. After dissolving copper sulfate in water, it is added to the liquid in which quick lime is dissolved in water (lime milk). There are no particular restrictions. Usually, it is used in various concentrations such as 6-6, 6-4, 5-5, 5-4, 4-4, 4-5 and 4-12. These are indicated by the number of grams of copper sulfate and quicklime in 1 liter of Bordeaux liquid. In the case of the 4-12 formula, copper sulfate is 4 g and quicklime is 12 g. Slaked lime or the like can be used in place of quick lime. Commercially available preparations include, for example, IC Bordeaux 66D and IC Bordeaux 412 (trade name, 4-12 Bordeaux equivalent) containing basic copper sulfate as an active ingredient, as drugs having the same components as the Bordeaux liquid. Further, there are Z Bordeaux (trade name, manufactured by Nippon Agricultural Chemicals Co., Ltd.) and the like, which are composed mainly of basic copper sulfate and dispensed with basic zinc sulfate and basic magnesium carbonate. Z Bordeaux is one of the particularly preferred embodiments.

  As the amount that can be contained in the agricultural and horticultural fungicide composition of the active ingredient of the present invention, the total amount of the active ingredient is usually about 0.11% to about 90%, preferably about 1% lower limit and about 50% upper limit. It is economical to contain in a range. The inorganic copper agent is used in the range of 0.1% to 80%, and the azoxystrobin is used in the range of 0.01% to 50%. The proportion of the inorganic copper agent and the azoxystrobin component can be used in the range of 1:10 to 100,000: 1, preferably 1: 1 to 10,000: 1. More preferably, it is in the range of 10: 1 to 1000: 1.

  Other components of the agricultural and horticultural fungicide composition of the present invention include, for example, surfactants, dispersants, diluents, emulsifiers, spreading agents, wetting agents, thickeners in addition to various solid and liquid carriers. Auxiliary components such as antifoaming agents, antifreezing agents, preservatives, antioxidants, decomposition inhibitors, metabolic inhibitors and adjuvants can also be added.

  The inert carrier that can be used in the present invention may be either solid or liquid. Examples of materials that can be used as a solid carrier include vegetable powders (for example, soybean flour, cereal flour, wood flour, bark flour, Sawdust, tobacco stem powder, walnut shell powder, bran, fiber powder, residues after extraction of plant extracts, etc.), synthetic polymers such as pulverized synthetic resin, clays (eg kaolin, bentonite, acid clay), talc (For example, talc, pyrophyllite, etc.), silicas {for example, diatomaceous earth, silica sand, mica, white carbon (some synthetic high-dispersion silicic acid also called hydrous fine silicon or hydrous silicic acid, and some products contain calcium silicate as a main component)} , Activated carbon, natural minerals (eg sulfur powder, pumice, attapulgite and zeolite), calcined diatomaceous earth, brick ground, fly ash, sand, plus For example, plastic carriers (eg, polyethylene, polypropylene, polyvinylidene chloride, etc.), inorganic mineral powders such as calcium carbonate, chemical fertilizers such as ammonium sulfate, ammonium nitrate, urea, and ammonium sulfate, organic fertilizers, fermented animal waste products, compost, etc. These may be used alone or in the form of a mixture of two or more.

  The material that can be used as a liquid carrier is selected from those having solvent ability itself and those capable of dispersing the active ingredient compound with the aid of an auxiliary agent without having solvent ability. The following carriers can be exemplified, but these are used alone or in the form of a mixture of two or more thereof, for example, water, alcohols (for example, methanol, ethanol, isopropanol, butanol, propylene glycol, etc.), ketones (for example, acetone) , Methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, etc.), ethers (eg, ethyl ether, dioxane, cellosolve, dipropyl ether, tetrahydrofuran, etc.), aliphatic hydrocarbons (eg, kerosene, mineral oil, etc.), aromatic hydrocarbons (E.g. benzene, torr , Xylene, solvent naphtha, alkylnaphthalene, etc.), halogenated hydrocarbons (eg, dichloroethane, chloroform, carbon tetrachloride, chlorinated benzene, etc.), esters (eg, ethyl acetate, diisopropylpropyl phthalate, dibutyl phthalate, dioctyl phthalate) Etc.), amides (for example, dimethylformamide, diethylformamide, dimethylacetamide, etc.), nitriles (for example, acetonitrile, etc.), dimethylsulfoxides, and the like. Preferably it is water.

  As other adjuvants, typical adjuvants exemplified below can be mentioned, and these adjuvants are used depending on the purpose, and singly, in some cases, two or more kinds of adjuvants are used together. In some cases it is possible to use no adjuvants at all. Surfactants are used for the purpose of emulsifying, dispersing, solubilizing and / or wetting of the active ingredient compound, such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene higher fatty acid ester, polyoxyethylene. Examples of surfactants such as resin acid ester, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monooleate, alkylaryl sulfonate, naphthalene sulfonate condensate, lignin sulfonate, higher alcohol sulfate Can do. Further, for the purpose of stabilizing the dispersion of the active ingredient compound, thickening, sticking and / or binding, the following auxiliary agents can be used, for example, thickeners such as casein, gelatin, starch, xanthan gum and the like. Adjuvants such as saccharides, celluloses such as methylcellulose and carboxymethylcellulose, high viscosity oils such as gum arabic, polyvinyl alcohol, pine oil and coconut oil, thixotropic compounds such as bentonite, and lignin sulfonate can also be used.

In order to improve the fluidity of solid products, the following adjuvants may be used, and for example, adjuvants such as waxes, stearates and alkyl phosphates may be used. As a peptizer for the suspension product, for example, auxiliary agents such as naphthalenesulfonic acid condensate and condensed phosphate can be used.
As the antifoaming agent, for example, an auxiliary agent such as silicone oil can be used.
As preservatives, parabens such as sodium benzoate, methyl paraoxybenzoate and butyl paraoxybenzoate, phenols such as potassium sorbate, 1,2-benzisothiazolin-3-one or parachlorometaxylenol are added. be able to.
Further, as required, functional spreaders such as terpenes, polyamide resins or higher fatty acid esters of polyoxyethylene / polyoxypropylene, activity enhancers such as metabolic degradation inhibitors such as piperonyl butoxide, ethylene glycol, propylene Antifreezing agents such as glycol, glycerin or diethylene glycol (BHA), antioxidants such as dibutylhydroxytoluene (BHT) or butylhydroxyanisole, ultraviolet absorbers such as hydroquinone compounds, benzophenone compounds or salicylic acid compounds, or methylcellulose, Other adjuvants such as drift inhibitors such as polyvinyl alcohol or sodium polyacrylate can be added.

  The agricultural and horticultural fungicide composition of the present invention further includes other pesticides, acaricides, and killing agents for the purpose of controlling diseases and pests to be controlled, for the purpose of expanding the appropriate control period, or for reducing the dose and synergistic effects. It can also be used by mixing with insecticides, fungicides, biological pesticides, etc., and can also be used by mixing with herbicides, plant growth regulators, fertilizers, etc., depending on the situation of use. In addition to / or in place of azoxystrobin, other strobilurin drugs can be added or used together. However, various combinations of strobilurin-based compounds have been studied as combinations with inorganic copper agents. For example, in the case of cresoxime methyl, trifloxystrobin, etc., the activity itself does not improve, the compound stability during mixing, the formulation physical chemistry It may not always be an excellent combination due to problems such as sex changes, the promotion of phytotoxicity, and various other factors. Therefore, various investigations are necessary for the amount of addition and prescription.

  The agricultural and horticultural fungicide composition of the present invention is generally used in a form convenient for use according to a conventional method on an agrochemical formulation. That is, an active ingredient such as an inorganic copper agent and azoxystrobin is dissolved in an appropriate inert carrier, or if necessary, together with an auxiliary agent in an appropriate ratio, dissolved, separated, suspended, mixed, impregnated, Adsorbed or adhered, suitable dosage forms such as suspensions, emulsions, milk suspensions, liquids, wettable powders, granules, wettable powders, flowable powders, powders, tablets, jumbo drugs, seed coating formulations, It can be formulated and applied to liquids. In addition, inorganic copper preparations and azoxystrobin preparations can be prepared and adjusted separately according to the above, and mixed and used at the time of use.

The following plant diseases can be exemplified as the use object of the agricultural and horticultural fungicide composition of the present invention. Broadly speaking, it includes filamentous fungal diseases, bacterial diseases, viral diseases, such as incomplete fungi (for example, Botrytis)
Diseases of the genus, Helminthosporium, Fusarium, Septoria, Cercospora, Pyricularia or Magnaporthaceae Alternaria, Alternaria (Alternaria) Genus diseases, etc.), basidiomycetes (eg, Hemileia genus diseases, Rhizoctonia)
Other fungi (eg, Ascochyta) such as genus diseases, Puccinia diseases, Venturia diseases, Monilinia diseases, Unsinula diseases, etc.
Genus diseases, Phoma genus diseases, Pythium genus diseases, Corticium genus diseases, Pyrenophora
Diseases such as genus diseases, etc., such as diseases of the genus Pseudomonas, diseases of the genus Xanthomonas, Erwinia
It includes genus diseases, etc., or diseases caused by viruses (for example, tobacco mosaic virus).

As individual diseases, for example, rice blast (Pyricularia oryzae or Magnaporthe grisea), rice rot (Rhizoctonia)
solani), rice sesame leaf blight (Cochiobolus miyabeanus), rice seedling blight (Rhizopus chinensis, Pythium)
graminicola, Fusarium graminicola, Fusarium roseum, Mucor sp., Phoma sp.,
Tricoderma sp.), Rice idiots (Gibberella fujikuroi), barley and wheat powdery mildew (Blumeria)
Graminis) or powdery mildew such as cucumber (Sphaerotheca fuliginea) and other host plants powdery mildew (Pseudocercosporella) such as barley and wheat
herpotrichoides), smut (Urocystis tritici) such as wheat, snow rot (Fusariumu nivale, barley and wheat)
Pythium iwayamai, Typhla ishikariensis, Sclerotinia borealis), oat crown rust (Puccinia)
coronata) and other plant rust, cucumber, strawberries, etc., gray mold (Botrytis cinerea), tomato, cabbage, etc., sclerotia (Sclerotinia)
sclerotiorum), potatoes, tomatoes and other diseases (Phytophthora infestans) and other plant diseases, cucumber downy mildew (Pseudoperonospora)
cubensis), downy mildew of various plants such as grape mildew (Plasmopara viticola), apple scab (Venturia inaequalis), apple spotted leaf disease (Alternaria)
mali),

Pear black spot (Alternaria kikuchiana), citrus black spot (Diaporthe citri), citrus scab (Elsinoe)
fawcetti), sugar beet brown spot (Cercospora beticola), groundnut brown spot (Cercospora arachidicola), groundnut black astringency (Cercospora)
personata), wheat leaf blight (Septoria tritici), wheat blight (Septoria nodorum), barley cloud type disease (Rhynchosporium)
secalis), Shiba leaf rot (Rhizoctonia solani), Shiba dollar spot disease (Sclerotinia homoeocarpa), Psuedomonas
Genus such as cucumber spotted bacterial disease (Pseudomonas syringae pv. Lachrymans), tomato bacterial wilt (Pseudomonas
solanacearum) and rice blight bacterial disease (Pseudomonas glumae), genus Xanthomonas, such as cabbage black rot (Xanthomonas)
campestris), rice leaf blight (Xanthomonas oryzae) and citrus scab (Xanthomonas citri), genus Erwinia, such as cabbage soft rot (Erwinia
It has a remarkable control effect against bacterial diseases such as carotovora) and viral diseases such as Tobacco mosaic virus.

  Preferably, it has a high control effect against cucumber downy mildew (Pseudoperonospora cubensis), potato, and tomato plague (Phytophthora infestans).

Although the plant which can use the fungicidal composition of this invention is not specifically limited, For example, the plant shown below is mentioned.
Cereals (for example, rice, barley, wheat, rye, oats, corn, coconut, etc.), beans (soybeans, red beans, broad beans, peas, peanuts, etc.), fruit trees and fruits (apples, citrus fruits, pears, grapes, Peach, plum, yellow peach, walnut, almond, banana, strawberry, etc.), vegetables (cabbage, tomato, spinach, broccoli, lettuce, onion, leek, green pepper, etc.), root vegetables (carrot, potato, sweet potato, radish, lotus root) ), Processing crops (cotton, hemp, kouzo, mitsumata, rapeseed, beet, hop, sugarcane, sugar beet, olive, rubber, coffee, tobacco, tea, etc.), moss (pumpkin, cucumber, watermelon, melon) ), Pastures (orchard grass, sorghum, timothy, clover, alfalfa, etc.), turf (Korean turf, bentgrass, etc.), crops for fragrances, etc. Lavender, rosemary, thyme, parsley, pepper, ginger, etc.), it can be used flowering plants (chrysanthemums, roses, plants of orchids, etc.) and the like.

  The agricultural and horticultural fungicide composition used in the method of use of the present invention is an effective amount for controlling plant diseases in the form as it is, or appropriately diluted with water or suspended to control various diseases. It is used by spraying on target plants that are predicted to occur, and can be applied to cultivation carriers such as soil and seedling mats for diseases that invade the roots and bases of plants. Soil irrigation treatment, seedling box irrigation treatment It can also be controlled at the time of sowing, planting, and growing season by cell tray irrigation treatment, soil mixing treatment, seed treatment and the like.

  The “soil” or “cultivation carrier” in carrying out the method of use of the present invention indicates a support for cultivating a plant, and the material is not particularly limited, but may be a material on which a plant can grow. For example, it includes so-called various soils, seedling mats, water, etc., sand, vermiculite, cotton, paper, diatomaceous earth, agar, gel-like substances, polymer substances, rock wool, glass wool, wood chips, bark, Pumice or a mixture thereof may be used.

  In the application method of the present invention, an inorganic copper agent and azoxystrobin may be mixed and applied, or individual active ingredient preparation compositions and diluents may be mixed and applied during processing. . In addition, when the inorganic copper agent and azoxystrobin are applied separately, they may be applied separately after dilution, or an interval of about 2 days may be provided.

  The agricultural and horticultural fungicide composition of the present invention may be mixed or mixed with other fungicides, insecticides, acaricides, nematicides, plant preparations, herbicides, seed disinfectants, fertilizers or soil improvement materials. Can be used simultaneously or at intervals.

  As the application concentration and application amount of the agricultural and horticultural fungicide composition of the present invention, in the case of spraying treatment, it is usually possible to economically control by diluting with water in the range of 100 to 2000 times. The amount of sprayed water can be effectively controlled by using from 100 liters per 10 ares to 500 liters per 10 ares. Moreover, it can be sprayed as it is as a powder without using water, and can be applied at a high concentration of about 10 to 100 times by a method such as soil irrigation treatment or seed treatment. In other methods, it can be used without dilution.

Although the typical manufacture example and test example of the agricultural and horticultural fungicide composition of this invention are illustrated below, this invention is not limited to these.
Production Example 1
35 parts by weight of basic copper sulfate,
4 parts by weight of azoxystrobin,
3 parts by weight of polyoxyethylene nonylphenyl ether sulfate sodium salt,
3 parts by weight of calcium lignin sulfonate,
4 parts by weight of hydrous silicic acid and 51 parts by weight of calcined diatomaceous earth,
The above is uniformly mixed and ground to obtain a wettable powder.

Production Example 2
22 parts by weight of basic copper sulfate,
0.5 parts by weight of azoxystrobin,
1.4 parts by weight of dioctylsulfosuccinate sodium,
3 parts by weight of polyoxyethylene alkyl ether,
5 parts by weight of propylene glycol,
68.1 parts by weight of water,
The above is mixed and wet pulverized, and 0.3 parts by weight of xanthan gum is added and mixed to obtain an aqueous suspension.

Test Example 1 Tomato plague control effect test A chemical solution of a predetermined concentration was prepared and sprayed on a 3.8 leaf stage tomato (variety: Ponterosa) grown in a pot (1/10000 are) at a rate of 150 liter / 10 are. . Tomato blight fungus (Phytophthora after drying)
infestans) spore suspension. Seven days after the inoculation, the disease incidence index was examined according to the following criteria, and the control value was determined according to Formula 1. The disease index in the untreated area was 10.0. In addition, the thing derived from Z Bordeaux was used for the basic copper sulfate of the following test.

Disease index 0: No disease 1: Disease area rate 1-10%
2: Spot area rate 11 to 20%
3: Disease area rate 21-30%
4: Disease area ratio 31 to 40%
5: lesion area rate 41-50%
6: lesion area rate 51-60%
7: 61-70% lesion area rate
8: lesion area rate 71-80%
9: lesion area rate 81-90%
10: lesion area rate 91-100%

[Formula 1]
(Case index of untreated area-Disease index of treated area) x 100
Control value (%) ＝ ――――――――――――――――――――――――――
Disease index of untreated areas

Occurrence level of phytotoxicity-: None ±: Slight phytotoxicity is recognized

  The expected value of Colby in the following table was calculated by the Colby calculation formula (2). In general, when two kinds of given active ingredients are mixed and processed, if the actually measured effect is larger than the expected value (E) calculated by the following Colby equation, the two kinds of active ingredients It is determined that the action of the combination of these is synergistic.

[Formula 2]
Expected value of Colby (E) = (X + Y) − (X × Y) ÷ 100
In the formula, X is the control value (%) of one active ingredient, Y is the control value (%) of the other active ingredient, and E is the expected control value expected for the combination of the two active ingredients ( %).

Test Example 2 Cucumber downy mildew control effect test A chemical solution of a predetermined concentration was prepared, and the leaves were cultivated in a pot (1/10000 are) at a ratio of 150 liters / 10 are on a cucumber (variety: four leaves) in the 2.3 leaf stage. Scattered. After drying, cucumber downy mildew (Psuedoperonospora
cubensis) spore suspension. Seven days after the inoculation, the disease index was examined in the same manner as in Test Example 1, and the control value was determined according to Formula 1. The disease index in the untreated area was 10.0. In addition, the existing drug-resistant strain was used as the cucumber downy mildew. Similar tests can be performed using sensitive strains.

Effects on cucumber downy mildew

  As described above, the combination of basic copper sulfate and azoxystrobin has a clear synergistic effect and does not cause any phytotoxicity. In particular, the synergistic effect is remarkable in the low concentration range, and it is also effective for drug-resistant strains. Therefore, it is possible to protect crops for a longer period of time with a practical dose.

Stability test example 3 of active ingredient Stability test Preparations in which other strobilurin-based drugs are added in the same manner instead of wettable powder and azoxystrobin in accordance with production example 1 are manufactured in the same manner and filled in 1 kg kraft bags. After that, it is allowed to stand in a thermostat at 50 ° C., and the state of the composition is observed after 2 weeks. After the observation, the amount of active ingredient is analyzed and the residual rate is calculated.

Test Example 4 Stability Test An aqueous suspension similar to that of Production Example 2 and a preparation in which other strobilurin-based drugs are added in place of azoxystrobin were prepared in the same manner, each filled in a 500 ml glass bottle, and shaken well. It is allowed to stand in a thermostat at 0 ° C., and the state of the composition is observed after 2 weeks. Shake well after the observation, analyze the amount of active ingredients and calculate the residual rate.

Claims (7)

An agricultural and horticultural fungicide composition comprising an inorganic copper agent and azoxystrobin as active ingredients. The agricultural and horticultural fungicide composition according to claim 1, wherein the inorganic copper agent is one or two compounds selected from the group consisting of basic copper chloride and basic copper sulfate. The agricultural and horticultural fungicide composition according to claim 1, wherein the inorganic copper agent is basic copper sulfate. A method for using an agricultural and horticultural fungicide composition comprising treating an effective amount of the agricultural and horticultural fungicide composition according to any one of claims 1 to 3 with a plant or a cultivation carrier. Agricultural and horticultural disease control characterized in that plants are treated at the same time with two kinds of diluted solutions each of which contains a composition containing inorganic copper as an active ingredient and a composition containing azoxystrobin as an active ingredient. Method. The control method according to claim 5, wherein the agricultural and horticultural disease is a drug resistant agricultural and horticultural disease. Use of an inorganic copper preparation to enhance the agricultural and horticultural disease control effect of azoxystrobin.