JP2963988B1 - Agricultural and horticultural fungicide - Google Patents

Abstract

[PROBLEMS] To have excellent bactericidal / controlling and insecticidal effects against various plant diseases and harmless to humans and animals.
Further, to provide an agricultural and horticultural bactericidal insecticide which is easy to transport and handle. SOLUTION: The reaction product obtained by dissolving one or more inorganic compounds selected from the group consisting of an alkaline earth metal compound and a phosphorus compound in ethanol is contained as an active ingredient. Fungicide for agricultural and horticultural use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fungicide for agricultural and horticultural use which exhibits excellent bactericidal / control and insecticidal effects against various plant diseases, has high safety, and is easy to handle.

[0002]

2. Description of the Related Art Fungicides for agricultural and horticultural use are roughly classified into organic fungicides and inorganic fungicides. There are many types of organic fungicides used for foliar application and rhizome absorption, but many of them are organic chlorine-based and organic phosphoric acid-based, and remain in the natural world, causing environmental pollution. It has become. In addition, as inorganic fungicides, heavy metal compounds such as copper agents,
Sulfur compounds and the like have been used, but all of them are harmful to humans and animals and presently a social problem. Therefore, there is a strong demand for the development of an agricultural and horticultural fungicide that is highly effective against the target disease and is highly safe.

On the other hand, the present inventors have focused on ethanol having strong bactericidal activity and high safety in developing the above-mentioned agricultural and horticultural fungicide. Ethanol is ranked first in the chemical industry, such as synthetic detergents and raw materials for the synthesis of various esters.
The food and drink industry is ranked second, followed by the pharmaceutical and other sanitary goods industry. It is widely used in the field of the food and beverage industry for alcoholic beverages, and it is widely known that ethanol is a harmless substance to humans or livestock. While this ethanol is used as a beverage, it has the unique property of being used as a pharmaceutical because of its disinfecting and bactericidal properties. Heretofore, it is said that the bactericidal effect of ethanol is maximum when the concentration as an aqueous solution is 70%, and decreases when the concentration is 60% or less and 80% or more. For this reason, a 70% aqueous solution of ethanol has long been used as a simple disinfectant. In recent years, due to an increase in infectious diseases caused by highly infectious pathogenic bacteria, such ethanol disinfectants are marketed not only for medical facilities but also for general households as disinfectants for kitchenware, food, body, etc. Is popular.

[0004] On the other hand, in the field of pesticides, ethanol is used as a part of raw materials in the synthesis of pesticides, but is not used as a fungicide for plant pathogenic fungi. The present inventors have attempted to apply an aqueous ethanol solution to control a wide range of plant diseases, in particular, the control of powdery mildew, charcoal disease, downy mildew, etc., which are important diseases of recently cultivated vegetables, fruit trees and flowers. As a result, the bactericidal effect of a 70% concentration aqueous ethanol solution was confirmed, as in the case of animal pathogens.
However, in controlling plant pathogenic bacteria, the bactericidal action did not decrease even at an ethanol aqueous solution concentration of 70% or more, but it was found that the higher the concentration was, the higher the controlling effect was. That is, the bactericidal / control action against plant disease fungi increases in proportion to the concentration of the aqueous ethanol solution. However, in actual use of a large amount of a highly concentrated aqueous solution of ethanol for agricultural and horticultural use, there are problems in that transportation and handling are inconvenient.

[0005]

Accordingly, the present invention has excellent sterilizing / controlling and insecticidal effects against various plant diseases, is harmless to humans and animals, and is easy to transport and handle. It is intended to provide a fungicidal insecticide for agricultural and horticultural use.

[0006]

Means for Solving the Problems The present inventors have studied a method for increasing the control effect of ethanol by adding another substance to ethanol without reducing the bactericidal action of ethanol. As a result, a reaction product obtained by dissolving one or two or more inorganic compounds selected from the group consisting of an alkaline earth metal compound and a phosphorus compound in ethanol is excellent in sterilizing and preventing various plant diseases. It has been found that it has a controlling effect and also has an insecticidal effect, and has completed a novel agricultural and horticultural fungicidal insecticide containing this reaction product as an active ingredient.

[0007] Ethanol is a substance having a relatively large polarity, but is generally known as a substance that does not dissolve and react with many inorganic compounds. However, the present inventors have conducted exploratory research on the reactivity of various inorganic compounds with ethanol, and as a result, alkaline earth metal compounds and phosphorus compounds have been dissolved in ethanol to form stable conjugates. I found that. This stable reaction product surprisingly exhibits excellent bactericidal / controlling and insecticidal effects against various plant diseases. An aqueous solution containing a calcium compound or a phosphorus compound alone also has a controlling effect on powdery mildew and the like, but a reaction product obtained by dissolving an inorganic compound selected from the group consisting of an alkaline earth metal compound and a phosphorus compound in ethanol. The product shows a more excellent sterilizing / controlling effect and insecticidal effect than the combined effects of a single inorganic compound or ethanol.

The reaction product of ethanol with an alkaline earth metal compound and / or a phosphorus compound in the present invention may be a complex salt or a coordination bonding compound of an inorganic compound with ethanol. The structure of the object is unknown. As used herein, the term "reaction product" includes all substances formed by the interaction of ethanol and inorganic compounds, including the complex salts, coordination compounds and the like described above.

[0009]

DETAILED DESCRIPTION OF THE INVENTION In the present invention, the inorganic compound which reacts with ethanol at room temperature to form a stable reaction product is one or more inorganic compounds selected from the group consisting of alkaline earth metal compounds and phosphorus compounds. Compounds. It is important that the inorganic compound is a substance that is harmless to humans and animals and does not cause environmental pollution (ie, is environmentally friendly). In view of the above, alkaline earth metal compounds include calcium chloride, calcium nitrate, calcium nitrite, calcium hypochlorite, calcium hydride, calcium bromide, quicklime, magnesium chloride, magnesium nitrate, perchloric acid. Examples include magnesium, magnesium acetate, magnesium hydride, barium chloride and the like, with calcium chloride and magnesium chloride being preferred. Examples of the phosphorus compound include phosphorus pentoxide, metaphosphoric acid, pyrophosphoric acid, phosphorus pentachloride, phosphorus trichloride, phosphorus pentabromide, and the like, with phosphorus pentoxide and metaphosphoric acid being preferred.

In the formation of a reaction product of ethanol and the above-mentioned inorganic compound, the ratio of ethanol to the inorganic compound varies depending on the inorganic compound used. In terms of weight ratio, the ratio of the inorganic compound is 0.1 to 10 with respect to 1 ethanol.
In the molar ratio, the amount of the inorganic compound was 0.1 to 1 for ethanol.
The molar ratio of the inorganic compound to ethanol is preferably 0.5 to 3. In general, the formation of reactants proceeds stoichiometrically, but this reaction does not necessarily proceed stoichiometrically, and the molar ratio varies depending on the type of inorganic compound. Some types of inorganic compounds are excessively dissolved and bound to ethanol. In the above reaction product, an excessive amount of the starting compound may remain unreacted.

The reaction between the ethanol and the inorganic compound in the present invention is usually carried out at room temperature, but may be carried out at any temperature as long as the reaction product of the present invention is obtained. In addition, the reaction between ethanol and an inorganic compound in the present invention is often an exothermic reaction, in which case the reaction proceeds at a temperature higher than room temperature. In the reaction between ethanol and an inorganic compound in the present invention, an inorganic compound may be added to ethanol under stirring, or ethanol may be added to the inorganic compound. Usually, after the addition, stirring is performed for 30 minutes to 60 minutes. Depending on the composition ratio, in most cases,
After the inorganic compound is dissolved in ethanol, as the reaction product is formed, the viscosity of the reaction mixture increases and eventually becomes a semi-solid or completely solid state. When using the reaction product, it is preferable to formulate the product in a state where it is easy to handle. Since the reaction product is water-soluble, it may be appropriately diluted with an aqueous solution containing a spreading agent (surfactant) and used as a liquid agent. The appropriate concentration after dilution depends on the target disease, the type of target pest, and other factors.
For example, it can be used after being diluted to 1000 ppm to 3000 ppm. As surfactant, any surfactant used in conventional fungicides or insecticides can be used. Further, the reaction product of the present invention can be mixed or dissolved with a hydrophobic substance and used as a wettable powder or a flowable agent. The agricultural and horticultural bactericidal insecticide of the present invention includes auxiliary agents, extenders, dispersants, adhesives, spreading agents, emulsifiers, diluents, and wet spreaders used in conventional fungicides or insecticides. Further, it may be contained. In addition, in the reaction product produced using any of the alkaline earth metal compound and the phosphorus compound, there is no evaporation of ethanol,
Since it has a slight hygroscopic property, it is preferable to use a container with a stopper or a sealed package when storing for a long time. The agricultural and horticultural fungicidal insecticide of the present invention can be used by being appropriately mixed with other fungicides, insecticides, herbicides, fertilizer substances, soil conditioners, and the like.

The target disease of the fungicide for agricultural and horticultural use of the present invention includes diseases such as powdery mildew, charcoal disease, leaf mold, scab, and gray mold. The target pest of the agricultural and horticultural fungicide of the present invention includes pests such as aphids, whitefly, spider mites, and thrips. As described above, the agricultural and horticultural fungicide of the present invention is widely effective against pests. The reaction product produced by using the alcohol and the inorganic metal compound of the present invention as raw materials is considered to belong to a kind of an organometallic compound, and a commercially available organic compound or a bactericide containing an inorganic compound as a main component has been used. The control effect by different mechanism of action is considered, and improvement of drug resistance, which has been a problem in the past, can be expected.

[0013]

EXAMPLES Examples of the fungicide for agricultural and horticultural use of the present invention will be described below. However, parts in each example mean parts by weight. Example 1 At room temperature, 60 parts of ethanol were mixed with 50 parts of calcium chloride.
The mixture was gradually added and reacted for about 30 minutes to obtain a solid product. Further, 5 parts of Twin # 20 was added and mixed uniformly to obtain a sterilizing insecticide for agriculture and horticulture of the present invention. Example 2 60 parts of magnesium chloride was gradually added to 30 parts of ethanol and reacted in the same manner as in Example 1 to obtain a solid product. Five parts of Twin # 20 were added thereto and mixed uniformly. Example 3 60 parts of phosphorus pentoxide was gradually added to 30 parts of ethanol and reacted in the same manner as in Example 1 to obtain a semi-solid product. Five parts of Twin # 20 were added thereto and mixed uniformly. Example 4 A solid product obtained by gradually adding and reacting 40 parts of calcium chloride to 60 parts of ethanol and a semi-solid product obtained by gradually adding and reacting 30 parts of phosphorus pentoxide to 30 parts of ethanol. The product was mixed uniformly to give a solid product. To this, 10 parts of Twin # 20 was added and mixed uniformly.

Next, the effects of the drug of the present invention will be specifically described with reference to test examples. Test Example 1 (Control Test against Cucumber Powdery Mildew) a) Test Method Cucumber (cultivar, “Angkor 8”, 16-leaf stage) grown in a greenhouse was used as a target plant. Powdery mildew (Sphaerothe
ca fuliginea) was due to a natural infection. The drug sample was diluted with water and used as a test. The drug described in Examples 1 to 4 was diluted 1000-fold with water in an initial infection state in which the flora was slightly observed in the lower leaf of the test cucumber, and sprayed by hand spraying until the leaf surface was sufficiently wetted. . After spraying, every 5 days, the area of the lesion area was visually determined to obtain a lesion area ratio, and the control value was calculated by the following formula. b) Test results The test results are shown in Table 1. The agents of the invention have clearly been found to be sufficiently practical.

[0015]

[Table 1] Table 1 Reagents applied Spraying concentration Control value Chemical damage (ppm) After 5 days After 10 days Example 1 1,000 100 98 None Example 2 1,000 100 95 None Example 3 1,000 100 90 None Example 4 1,000 100 96 None

Test Example 2 (Control Test Against Strawberry Powdery Mildew) a) Test Method A test strawberry (variety, “Onmine”, 3-5 leaf stage) cultivated in a greenhouse was naturally infected with powdery mildew (Sphaerotheca humuli). The specimens in the initial infection state were tested. The drug samples of Examples 1 to 3 were diluted 1000-fold with water and sprayed by spraying. Ten days after spraying, the disease state was examined. The control value was calculated in the same manner as in Test Example 1. b) Test results The test results are shown in Table 2. The agent of the present invention was found to be sufficiently practical.

[0017]

[Table 2] Table 2 Reagents applied Spray concentration Control value Chemical damage (ppm) Example after 10 days Example 1 1,000 96 None Example 2 1,000 94 None Example 3 1,000 98 None

Test Example 3 (Growth Inhibition Test against Cucumber Gray Mold) a) Test Method Gray mold fungus (Botrytis cinerea) was cultured on a PDS plate medium at 20 ° C. 5 mmφ) and used. The drug sample was diluted to 2,000 ppm with distilled water, and 1 ml of the diluted solution was 9 cmφ.
9 ml of PDS medium cooled to about 80 ° C. was poured into the dish, mixed quickly, and allowed to stand at room temperature to prepare a diluted plate medium. The cell disk was placed in the center of this medium, cultured at 20 ° C., and the growth area of the cells after 4 days was measured, and the inhibition rate was determined by comparing with the control (without adding a drug). b) Test results The test results are shown in Table 3. The agent of the present invention was clearly found to inhibit the growth of bacterial cells.

[0019]

[Table 3] Table 3 Reagents to be applied Spray concentration Inhibition rate (%) (ppm) Four days later Example 1 2,000 80 Example 2 2,000 93 Example 4 2,000 98 No drug added-0

Test Example 4 (Control test against turfgrass leaf rot) a) Test method Turfgrass leaf rot fungus (Pythium aphanidernatum) was pre-cultured on a PDS plate medium, and the cells were mixed with sterile soil to obtain a bacterium. Contaminated soil was prepared. A plastic pot was filled with 50 g of bacteria-contaminated soil, and a drug sample was irrigated with 20 ml of the soil.
g. 14 days after sowing, the extent of the disease was visually observed. In addition, the dry matter amount of the root part and the above-ground part of the plant was measured, and the dry matter ratio was calculated by setting the control (no inoculation of bacteria) to 100. b) Test results The test results are shown in Table 4. The agents of the present invention have clearly been found to be sufficiently practical.

[0021]

[Table 4]

Test Example 5 (Insecticidal test against aphids) a) Test method Aphids (peach peach aphids) are larvae and adults infested (about 40) on cucumber leaves in a greenhouse, and collected for each leaf. The medicine was sprayed until the body leaked. After spraying,
Cucumber leaves infested with aphids were placed in a beaker (200 ml) containing water and allowed to stand at 25 ° C. for 2 days, and the number of dead insects was examined to determine the insecticidal rate. b) Test results The test results are shown in Table 5. The agent of the present invention was found to be sufficiently practical.

[0023]

[Table 5] Table 5 Reagents applied Spray concentration Pesticide rate (%) (ppm) Example 1 3,000 91 Example 2 3,000 83 Example 3 2,000 96 Example 4 2,000 98

[0024]

As described above, the germicidal insecticide for agricultural and horticultural use of the present invention exhibits excellent bactericidal and controlling effects against various plant diseases, and also exhibits excellent insecticidal effects. Moreover, the agricultural and horticultural fungicide of the present invention has high safety and is easy to handle.

Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) A01N 31/02 A01N 25/02 A01N 59/06 A01N 59/26 CAPLUS (STN) REGISTRY (STN) WPIDS (STN)

Claims (2)

(57) [Claims] Claims: 1. An ethanol solution containing calcium chloride, calcium nitrate, calcium nitrite, calcium hypochlorite,
Calcium hydride, calcium bromide, quicklime, magnesium chloride, magnesium nitrate, magnesium perchlorate,
One or more inorganic compounds selected from the group consisting of magnesium acetate, magnesium hydride, barium chloride, phosphorus pentoxide, metaphosphoric acid, pyrophosphoric acid, phosphorus pentachloride, phosphorus trichloride, and phosphorus pentabromide A fungicide for agricultural and horticultural use, characterized by containing a reaction product obtained by dissolution as an active ingredient. 2. The fungicide for agricultural and horticultural use according to claim 1, wherein said inorganic compound is reacted at a ratio of 0.2 to 6 mol with respect to 1 mol of ethanol.