JP2000026223A - Bordeaux mixture and agricultural germicide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a Bordeaux mixture having quality comparable to those of Bordeaux mixtures of common use with less labor and shorter time by including a specific lime stock and an aqueous solution of copper sulfate. SOLUTION: This Bordeaux mixture is obtained by including (A) a lime stock comprising (i) dry calcium hydroxide powder <=7.5 μm in average particle size and >=20 m2/g in specific surface are and, as necessary its mixture with (ii) water and (B) an aqueous solution of copper sulfate; wherein for the contents of the respective components in the Bordeaux mixture, the component (i) is pref. at 0.05-3.5 wt.% (more pref. at 0.1-2.6 wt.% or so) on a solid basis, and the copper sulfate pref. at 0.05-2.0 wt.% (more pref. at 0.1-1.0 wt.% or so) in terms of CuSO4.5H2O; furthermore, the component A may contain (iii) 0.1-10 wt.% of a surfactant based on the component (i) on a solid basis; it is preferable that the mixture of the components (i) and (ii) are subjected to wet-ground treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bordeaux solution and an agricultural fungicide.

[0002]

2. Description of the Related Art Bordeaux liquor has long been used as a pesticide for disinfecting various agricultural crops such as apples, grapes, citrus fruits, peaches and other fruit trees. Also, copper hydroxide,
Agricultural fungicides mainly containing inorganic copper agents such as basic copper sulfate and basic copper chloride are also used as pesticides for sterilizing grapes, fruits such as citrus fruits, tomatoes, and vegetables such as asparagus. I have. The Bordeaux solution and the inorganic copper agent are used in order to avoid the emergence of resistant bacteria and to avoid organic pesticides containing chemicals (environmental hormones) suspected of having an endocrine disrupting effect, which has recently become a problem. Instead, they are being reviewed again in terms of environmentally friendly aspects as described above.

[0003] The Bordeaux solution is usually prepared by dissolving slaked lime in water by wet digestion in which quicklime is reacted with water in water, and then cooling the slaked lime suspension, which has been heated to a high temperature by the heat of reaction, is cooled. Further, to the slaked lime aqueous suspension diluted by appropriately adding water, a copper sulfate diluted aqueous solution prepared by separately dissolving copper sulfate in water is gradually added with stirring at a temperature around room temperature. I have.

[0004] In addition, the inorganic copper agent is used for the purpose of reducing phytotoxicity to crops due to copper dissolved by becoming acidic.
It is sprayed with the addition of a drug mainly composed of calcium carbonate (calcium carbonate wettable powder).

[0005]

However, the work of preparing a Bordeaux solution as described above requires labor, labor and time for digestion of quick lime and its cooling, and also involves scattering and burns due to boiling due to heat generation. There is a danger. In addition, the size and agglomerated state of the slaked lime particles in the aqueous suspension generated by the method of digesting quick lime are different, and to obtain a slaked lime aqueous suspension that is homogeneous, fine and has good suspension properties in water. Requires skill and effort.

If slaked lime powder obtained by general dry digestion is used without using quicklime, a slaked lime water suspension can be easily obtained simply by diluting and dispersing in water. Even if a Bordeaux solution is prepared using a conventional method, the obtained Bordeaux solution has poor suspension properties in water, and therefore has poor adhesion to crops, and changes in concentration due to sedimentation in the spraying container and nozzle clogging of the sprayer, etc. Occurs.

Therefore, there is a need for a lime raw material for a Bordeaux solution, which does not require cumbersome quick lime digestion operations and can obtain a suspension equivalent to slaked lime aqueous suspension using quick lime as a raw material simply by dilution and dispersion in water. .

[0008] Further, calcium carbonate wettable powder used for the purpose of reducing the phytotoxicity caused by copper in addition to the inorganic copper agent has insufficient susceptibility in water, has better susceptibility, and is less susceptible to agricultural crops. There is a demand for a drug that has good adhesion and fixation properties and that has a higher phytotoxicity reducing effect.

Accordingly, an object of the present invention is to provide a bordeaux solution using a lime raw material and an agricultural fungicide using a safener which meet the above-mentioned demand.

[0010]

That is, according to the present invention, in a Bordeaux solution containing at least a lime raw material and an aqueous solution of copper sulfate, the lime raw material has an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g. The present invention relates to a Bordeaux liquid characterized by using a mixture of the above-mentioned slaked lime powder or water.

Further, the present invention provides an inorganic copper agent selected from the group consisting of copper hydroxide, basic copper sulfate and basic copper chloride;
In an agricultural fungicide containing at least a safener, a dry slaked lime powder having an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g or more or a mixture with water is used as the safener. The present invention relates to a disinfectant for agricultural use.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The bordeaux liquid is composed of bordeaux liquid particles composed of a reaction product of a slaked lime water suspension and an aqueous copper sulfate solution as described above. As raw material, average particle size 7.5μ
m and a specific surface area of 20 m ² / g or more, which is a powder of slaked lime (hereinafter referred to as “fine slaked lime”) or a mixture with water. Here, even if the average particle diameter of slaked lime is 7.5 μm or less, the specific surface area is 20 m ² /
g, or even if the specific surface area is 20 m ² / g or more, if the average particle size is more than 7.5 μm, the suspended property is poor when slaked lime is dispersed in water. Bordeaux liquid using slaked lime as a lime raw material has poor suspension properties, and therefore poor adhesion to crops.Also, changes in concentration due to sedimentation in the spraying container, nozzle clogging of the sprayer, etc. occur, and it is uniform. Effective spraying cannot be performed.

The bordeaux solution described in the present specification contains slaked lime and copper sulfate at conventional concentrations. For example, slaked lime is 0.05 to 3.5% by weight in terms of solid content, preferably, About 0.1-2.6% by weight, copper sulfate is C
uso ₄ · 5H 0.05 to 2.0% by weight ₂ O, in which preferably comprising about 0.1 to 1.0 wt%.

The agricultural germicide of the present invention comprises an inorganic copper agent and a safener. Here, the inorganic copper agent is not particularly limited, for example, copper hydroxide,
Conventional inorganic copper agents such as basic copper sulfate and basic copper chloride can be used. Here, the concentration of the inorganic copper agent is, for example, 0.01 to 3.0% by weight, preferably 0.02 to 2.0% by weight.
% By weight.

The agricultural fungicide of the present invention is characterized in that a dry sludge of the above-mentioned slaked lime or a mixture with water is used as a safener for the inorganic copper agent.
Here, even if the average particle diameter of slaked lime is 7.5 μm or less, even if the specific surface area is less than 20 m ² / g or the specific surface area is 20 m ² / g or more, the average particle diameter is 7.5 μm.
If it exceeds m, the suspended property is poor when slaked lime is dispersed in water. Such an aqueous dispersion for sterilization of agriculture using slaked lime has poor suspendability, and therefore adheres to agricultural crops. In addition, the concentration is changed due to sedimentation in the spraying container, and the nozzle of the sprayer is clogged, so that uniform and effective spraying cannot be performed.

The concentration of the fine slaked lime is in the range of 0.05 to 5.0% by weight, preferably 0.1 to 3.0% by weight in terms of solid content.

The mixture of the fine slaked lime powder and water is described in Inorganic Materials Magazine (edited by the Society of Inorganic Materials).
Vol. 2, No. 258, 358-364 (199
5) and JP-A Nos. 9-110019 and 9-1036.
Nos. 40, 9-110423 and 9-110
424, 9-165216, 9-24
Nos. 9415, 9-278434, 9-2
Nos. 78433, 9-278499, and 10
No. -25112, alcohols (monohydric alcohols such as methanol and ethanol,
Dihydric alcohols such as ethylene glycol, diethylene glycol and propylene glycol, trihydric alcohols such as glycerin, etc.); amines such as monoethanolamine, diethanolamine and triethanolamine;
Oxycarboxylic acids such as citric acid, tartaric acid and gluconic acid and salts thereof; sugars such as sucrose and glucose; succinate;
Lignin sulfonate: It is obtained by digesting quicklime with an aqueous solution to which an acetate has been added to dry powder or digesting so that a small amount of water to a slurry-like water remains, and then drying if necessary. When fine slaked lime is stored in the form of a mixture with water, its concentration is not particularly limited, but a solid content of 20% by weight or more is practical. If the solid content is less than 20% by weight, a large-capacity container is required for storage, and it is disadvantageous in terms of transportation cost. This is because re-dispersion may take time.

A dry slaked lime aqueous suspension is prepared by dispersing the above-mentioned fine slaked lime with a dry powder or water, and the slaked lime aqueous suspension is reacted with a copper sulfate aqueous solution by a conventional method using the slaked lime aqueous suspension as a raw material. It exhibits almost the same susceptibility as a Bordeaux solution prepared by a conventional method using quicklime as a lime raw material. The reason is that the fine slaked lime used is fine particles and its specific surface area is large, so the dissolving rate of the fine slaked lime in water is high, and the reaction of ions between water and copper sulfate aqueous solution in water Opportunities increase, the number of reactive particles in water is high, which results in the generation of fine Bordeaux liquid particles,
In addition, even when the reaction with the aqueous solution of copper sulfate occurs on the surface of slaked lime particles, since the surface area of each particle is large and the reaction area is large, aggregation is unlikely to occur, and a fine, fine suspended Bordeaux solution is generated. It is inferred.

Further, a mixture of finely ground slaked lime and dry powder or water can be used as a calcium carbonate wettable powder (for example, Crefnon (trade name, manufactured by Shiraishi Calcium Co., Ltd.), trade name) currently used as a safener for inorganic copper agents. Apron (manufactured by Nitto Powder Chemical Co., Ltd.), trade name Dick apron (manufactured by Dainippon Ink and Chemicals, Inc.)], etc., have better suspension properties in water at the same solid concentration, and Is a slaked lime, so when used as an agricultural fungicide in addition to an inorganic copper agent, it has a strong adhesive force and sticking force to agricultural products (slaked lime absorbs carbon dioxide in the air and changes to calcium carbonate) The adhesion is strong due to the entanglement of the calcium carbonate crystals that precipitate at the time). Also, since it is a strong alkali, the effect of suppressing the elution of copper is strong, and the effect of reducing phytotoxicity for a certain period (until slaked lime runs off due to rain, etc.) Is high .

The bordeaux solution or the agricultural disinfectant according to the present invention contains a fine powder of slaked lime or a mixture thereof with water.
The active ingredient may contain a surfactant in an amount of 0.1 to 10% by weight based on the solid content of slaked lime. By adding a surfactant in advance to the dry powder of fine slaked lime or a mixture with water, when dispersing an aqueous dispersion of a Bordeaux solution or an agricultural fungicide at a spray concentration, the dispersibility and suspension in water are improved. And the wettability to agricultural products, that is, spreadability can be improved. The surfactant can be appropriately added and mixed during the process of producing fine slaked lime by reacting quicklime, water and additives, or to the obtained fine slaked lime. If the added amount of the surfactant is less than 0.1% by weight, the effect is weak, and if it exceeds 10% by weight, the effect corresponding thereto is not increased, so that there is no economical significance.

As the surfactant, for example, JP-A-2-279610, JP-A-2-279612,
Homopolymers or copolymers of carboxyl group-containing vinyl compounds, copolymers of carboxyl group-containing vinyl compounds and other vinyl compounds as disclosed in JP-A-4-198102 and JP-A-4-198103, or Those having a salt of these polymers as an active ingredient, those having a salt of naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or any of these formalin condensates as an active ingredient, and those having the following general formula (a)

Embedded image (Wherein, R ¹ represents a hydrogen atom or a methyl group, R ² represents an alkyl group, an alkenyl group, or an alkylphenyl group having 1 to 30 carbon atoms, m is 2 to 4, and n is 1 to 50) It is preferable to use those containing the component represented by the formula (1) as an active ingredient or those containing an alkylene oxide adduct of a polyamine as an active ingredient. By using these surfactants, when storing a mixture of fine slaked lime with water, it is possible to prevent the growth of particles or to increase the concentration by lowering the viscosity, and to further dilute the mixture. Or when used as a Bordeaux solution, or as an aqueous dispersion of an agricultural disinfectant,
The dispersion of the particles and the structural properties of the surfactant molecules are particularly effective in adsorbing on the surface of the dispersed particles to form secondary aggregates to improve the suspension.

Among the above surfactants, examples of the vinyl compound having a carboxyl group include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, and alkali metal salts, ammonium salts, and C1-C20 of these.
And alkylene oxide adducts such as ethylene oxide adducts and propylene oxide adducts.

Other vinyl compounds used by copolymerizing with a carboxyl group-containing vinyl compound include, for example, ethylene, propylene, butadiene, isoprene,
2-methyl-1-butene, 1-hexene, isobutylene, diisobutylene, 1-dodecene, styrene, p-methylstyrene, isopropyl vinyl ether, butyl vinyl ether, isopropenyl methyl ether, vinyl acetate, acrylamide and the like. The amount of these other vinyl compounds to be used is preferably 80% by weight or less, more preferably 60% by weight or less, based on the total amount with the carboxyl group-containing vinyl compound.

Further, as a salt of naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or a formalin condensate thereof, a lower amine salt such as an ethanolamine salt can be used in addition to an alkali metal salt or an ammonium salt. The degree of condensation of the formalin condensate is
Those having an average degree of condensation in the range of 2 to 10 are preferred.

In the compound represented by the general formula (a), R ² is methyl, ethyl, propyl, isopropyl, butyl, hexyl, octyl, decyl, dodecyl, isotridecyl. Group, tetradecyl group, hexadecyl group, docosyl group, oleyl group,
Examples include a linole group, a phenyl group, an octylphenyl group, a nonylphenyl group, and a dodecylphenyl group. Further, examples of C _m H _2m O in the general formula (a) include an oxyethylene group, an oxypropylene group, an oxybutylene group, and an oxytetramethylene group, and these include ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran. It is added.

In the polyamine alkylene oxide adduct, the polyamine may be ethylenediamine, trimethylenediamine, hexamethylenediamine,
Diethylenetriamine, 1,2,3-triaminopropane, triethylenetetramine, etc., and a molecular weight of 500
５００500,000 polyethyleneimine.
An alkylene oxide adduct of a polyamine refers to an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide alone or in addition to the above polyamine.
It is obtained by addition polymerization as more than one kind of block or random adduct.

Of the above-mentioned mixture of fine slaked lime and water, the mixture with fluid water can be subjected to wet pulverization to obtain finer particles of slaked lime and to be used for Bordeaux liquid or agricultural use. It becomes a more preferable form of slaked lime for incorporation into a fungicide. As the wet pulverizer, a ball mill, a tube mill, a tower mill, a bead mill, a pearl mill, a universal mill, an attritor, and the like, a homogenizer having an action of loosening aggregates, an ultrasonic emulsifier, and the like can be used.

When an agricultural fungicide uses a finely ground slaked lime dry powder or a mixture with water as a safener for the inorganic copper agent, the application time of the finely slaked lime dry powder or a mixture with water depends on the agricultural sterilizing agent. As a matter of course, the preparation can be made by using an inorganic copper agent and fine slaked lime, and it is not particularly limited.

[0029]

The present invention will be further described with reference to the following examples. Charge 1000ml of water into a 12-liter beaker with fine slaked lime, about 5c
The average particle diameter is 4.9 μm and the specific surface area is 27.0 while stirring at 150 rpm with four propeller blades of mφ shape.
500 g of fine slaked lime having m ² / g and a water content of 0.5% by weight were charged and further stirred for 30 minutes to prepare a slurry-like mixture.

Fine slaked lime 2 A slurry mixture was obtained in the same manner as in the above fine slaked lime 1, except that 10 g of an ammonium salt of a copolymer of maleic acid and styrene having a molar ratio of 1: 2 was added to water.

Fine slaked lime 3 An average particle diameter of 6.5 was added to a Henschel mixer of 75 liters.
20.0 kg of fine slaked lime having a specific surface area of 30.8 m ² / g and a water content of 0.9% by weight was charged, and 0.6 kg of sodium formalin condensate of naphthalenesulfonate (average degree of condensation 6.5) was charged with stirring. Dry powder of fine slaked lime was obtained by adding.

Fine slaked lime 4 A slurry mixture was obtained in the same manner as in fine slaked lime 1, except that 10 g of a 10 mol adduct of methanol with ethylene oxide (EO) was added to water.

Fine slaked lime 5 A slurry mixture was obtained in the same manner as in fine slaked lime 1, except that 15 g of a 30 mol ethylene oxide (EO) adduct of ethylenediamine was added to water.

Fine Slaked Lime 6 A 20 liter polyethylene bucket was charged with 10 liters of water, and a maleic acid and styrene molar ratio of 1: 2 was added thereto.
100 g of an ammonium salt of a copolymer of the formula (1), an average particle diameter of 4.9 μm and a specific surface area of 27.0 m ² /
g, and 5.0 kg of fine slaked lime having a water content of 0.5% by weight were added thereto, followed by stirring for further 30 minutes to obtain a slurry-like mixture. Next, pearl mill [Ashizawa Co., Ltd. PMIST]
S type], peripheral speed 8m / sec, glass bead filling 300m
1 and wet pulverization once under the condition of a stock solution supply rate of 5 L / min to obtain a slurry mixture.

Example 1 (Preparation of Bordeaux solution) 24.0 g of fine slaked lime 1 (8 in terms of fine slaked lime solids)
0 g) was placed in a 1 liter beaker, diluted with water to 200 ml, and the resulting dispersion was stirred.
Copper sulfate in water of _{800ml (CuSO 4 · 5H 2 O} ) 6.
An aqueous solution of copper sulfate in which 0 g was dissolved was gradually added to prepare about 1.0 liter of a solution corresponding to the 6-6 type Bordeaux solution.

Example 2 (Preparation of Bordeaux solution) In Example 1, fine slaked lime 3 was used instead of fine slaked lime 1.
8.3 g of powdered product (8.0 g in terms of fine slaked lime solids)
A solution corresponding to the 6-6 formula Bordeaux solution was prepared in the same manner as in Example 1 except for using.

Example 3 (Preparation of Bordeaux solution) In Example 1, fine slaked lime 4 was used instead of fine slaked lime 1.
6 in the same manner as in Example 1 except that the slurry-like product was used.
A liquid equivalent to a -6 formula Bordeaux solution was prepared.

Example 4 (Preparation of Bordeaux solution) In Example 1, fine slaked lime 5 was used instead of fine slaked lime 1.
6 in the same manner as in Example 1 except that the slurry-like product was used.
A liquid equivalent to a -6 formula Bordeaux solution was prepared.

Example 5 (Preparation of Bordeaux solution) In Example 1, fine slaked lime 6 was used instead of fine slaked lime 1.
6 in the same manner as in Example 1 except that the slurry-like product was used.
A liquid equivalent to a -6 formula Bordeaux solution was prepared.

Comparative Example 1 (Preparation of Bordeaux solution) 6.0 g of powdered lime for Bordeaux solution was wet digested in 24 ml of water, allowed to cool, transferred to a 1 liter beaker, and water was added to 200 ml, and slaked lime at 23.5 ° C. Emulsion was made.
While stirring the slaked lime emulsion, copper sulfate (CuSO _4.
The 5H ₂ O) 6.0 g was created gradually added copper sulfate aqueous solution prepared by dissolving in water 800 ml 6-6 Formula Bordeaux mixture.

Comparative Example 2 (Preparation of Bordeaux solution) In Example 1, the average particle diameter by general dry digestion was 6.5 μm and the specific surface area was 13.0 m in place of the slaked lime 1.
6-6 in the same manner as in Example 1 except for using 8.0 g of a powdery product (45 μm sieve residue 0.01% by weight) from which coarse particles of slaked lime having a moisture content of ² / g and 0.5% by weight of water were removed. A solution corresponding to the formula Bordeaux solution was prepared.

Comparative Example 3 (Preparation of Bordeaux solution from Bordeaux solution composition prepared according to the method described in JP-A-2-279611) In a 20-liter enameled steel bucket, 3.0 kg of powdered lime was added to 6.0 kg of water. (15 ° C)
After standing overnight, add the evaporated water to the content of 9.0 kg.
And The temperature of the obtained slaked lime emulsion was 27.5 ° C. Separately, copper sulfate _(CuSO 4 · _5H 2 O)
An aqueous copper sulfate solution in which 3.0 kg was dissolved in 8.0 kg of water at 30 ° C. was added to the slaked lime emulsion, and the mixture was stirred for 60 minutes, and thereafter, a wet mill pearl mill [Ashizawa PMISTS type]
The mixture was pulverized once under the conditions of a peripheral speed of 8 m / sec, a glass bead filling amount of 300 ml, and a stock solution supply speed of 5 liter / min to produce 20 kg of a slurry-like Bordeaux liquid composition (equivalent to a 150-150 type Bordeaux liquid). 40.0 g of the obtained slurry-like bordeaux liquid composition was fractionated, and water was added thereto to obtain 1000 m
Then, the mixture was stirred well and dispersed to prepare a solution corresponding to the 6-6 type Bordeaux solution.

In Examples 1 to 5 and Comparative Examples 2 to 3, 6-
In order to check the suspension of the 6-type Bordeaux solution equivalent to the 6-type Bordeaux solution and the 6-6 type Bordeaux solution of Comparative Example 1, 100.0 ml of each sample was collected in a stoppered 100 ml graduated cylinder, and after shaking for 1 minute,
After standing still on a horizontal desk, the sedimentation volume after 10 minutes, 30 minutes and 60 minutes was read on a graduated cylinder scale. The results obtained are set forth in Table 1 below.

[0044]

[Table 1]

From the results shown in Table 1, the liquid equivalent to the Bordeaux solution of Example 1 shows the same sedimentation volume as the conventional Bordeaux solution of Comparative Example 1 and the liquid equivalent to the Bordeaux solution of Comparative Example 3, and the same suspension volume as Comparative Examples 1 and 3. It is understood that it has the property. Further, the bordeaux solution-equivalent liquids of Examples 2 to 5 containing a surfactant exhibited more excellent suspension properties than the bordeaux solution-equivalent liquid of Example 1 without the addition of a surfactant. Furthermore, Example 5 using the fine slaked lime subjected to the wet pulverization showed particularly excellent suspension properties as compared with Comparative Example 3 similarly subjected to the wet pulverization. However, the liquid equivalent to the Bordeaux liquid of Comparative Example 2 using slaked lime having a specific surface area smaller than the range of the present invention was extremely poor in suspension.

Example 6 (Preparation of Agricultural Fungicide) Coside D, an inorganic copper agent containing cupric hydroxide as a main component
F [manufactured by Sankyo Co., Ltd.] 1.0 g and a slurry or powder of fine slaked lime 1 to 6 and a commercially available calcium carbonate wettable powder [Clephnone (manufactured by Shiraishi Calcium Co., Ltd.)] (comparative product 1) The slaked lime used in Comparative Example 2 (Comparative Product 2)
20.0 g in terms of solid content was added to 1000 ml of water, and the mixture was stirred and dispersed to prepare a disinfectant for agricultural use. In order to check the suspension of the obtained dispersion, each sample was placed in a 100 ml measuring cylinder with a stopper.
0.0 ml was collected, shaken for 1 minute, allowed to stand on a horizontal desk, read the sedimentation volume after 5 minutes, 10 minutes, and 15 minutes on a graduated cylinder scale. The settled volumes of slaked lime and Crefnon were read as they disperse in water and hardly settle). The results obtained are set forth in Table 2 below.

[0047]

[Table 2]

From the results in Table 2, it can be seen that, in the agricultural germicide composed of an inorganic copper agent containing cupric hydroxide as a main component and a safener, the present invention using fine slaked lime 1 as a safener is used. The product 1 has a larger sedimentation volume (slower sedimentation speed) than the calcium carbonate wettable powder of the comparative product 1, indicating that the suspension in water is good. The products 2 to 6 of the present invention using the fine slaked limes 2 to 6 to which a surfactant was added as a safener had better suspension properties compared to the product 1 of the present invention without a surfactant. The product 6 of the present invention using the fine slaked lime 6 subjected to the wet pulverization treatment was particularly excellent in suspension. From the above results, when using fine slaked lime 1-6 as a safener for inorganic copper agent in agricultural fungicides,
It turns out that the effect superior to the conventional calcium carbonate wettable powder can be exhibited.

[0049]

【The invention's effect】 As described above, the average particle size is 7.5 μm or less.
Below, specific surface area 20m²/ G or more fine slaked lime powder
Is a mixture of water and lime as a lime raw material,
With less labor, labor and time compared to Bordeaux solution,
An equivalent quality of Bordeaux solution can be provided.

Further, when a mixture of the above-mentioned fine slaked lime with a dry powder or water is added as a safener for an agricultural germicide containing an inorganic copper agent, the resulting agricultural germicide has good suspension properties. For this reason, it is possible to apply a uniform, stable spray having good adhesion to agricultural products. In addition, slaked lime, as compared with calcium carbonate, which is a conventional safener, slaked lime particles adhering to crops react with carbon dioxide in the air to precipitate calcium carbonate crystals from the particle surface and firmly adhere, Since it is a strong alkali, the sustainability of the phytotoxicity reducing effect is good.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) A01N 59/06 A01N 59/06 Z

Claims (6)

[Claims] A lime raw material containing at least a lime raw material and an aqueous solution of copper sulfate, a mixture of dry slaked lime or water having an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g or more as a lime raw material. Bordeaux solution characterized by using. 2. The method according to claim 1, wherein the surfactant is 0.1% in terms of slaked lime solid content.
The Bordeaux solution according to claim 1, which contains -10.0% by weight. 3. The Bordeaux liquid according to claim 1, wherein the mixture of slaked lime and water has been subjected to a wet pulverization treatment. 4. An agricultural fungicide comprising at least an inorganic copper agent selected from the group consisting of copper hydroxide, basic copper sulfate and basic copper chloride and a safener, as a safener. With an average particle size of 7.5 μm or less and a specific surface area of 20
agricultural fungicides, which comprises using a mixture of dry powder or water m 2 ^{/ g} or more slaked lime. 5. A surfactant in an amount of 0.1 in terms of slaked lime solid content.
The agricultural fungicide according to claim 3, which contains about 10.0% by weight. 6. The agricultural fungicide according to claim 4, wherein the mixture of slaked lime and water has been subjected to wet pulverization.