JPS58113112A - Fungicidal and stored grain blight controlling agent for agricultural and horticultural use - Google Patents

Abstract

PURPOSE:To provide a pollution-free titled controlling agent having high safety, by using KOH, NaOH, Ca(OH)2 and a compound selected from veronal sodium hydrochloride, trisethanolamine, P-NaPH, and B-NaOH as active components. CONSTITUTION:The titled agent is obtained by using one or more compounds selected from KOH, NaOH and Ca(OH)2 (used widely as a raw material of soap, various reagents, soil neutralizing agent, etc.) and veronal sodium hydrochloride, trisethanolamine, P-NaOH and B-NaOH (the latter two are kinds of Clark-Lubs buffer solution) useful as a buffering agent. The controlling agent exhibits its effect remarkably under alkaline pH condition, especially at 8-8.5pH.

Description

DETAILED DESCRIPTION OF THE INVENTION Calcium hydroxide, peronal. sodium hydrochloride,
Tris. Ethanolamine, P-NaOH and B-Na
This invention relates to an agricultural and horticultural disinfectant and storage disease control agent containing seven or more active ingredients selected from the group consisting of OH.

Traditionally, noble metal compounds such as copper agents, mercury agents, and arsenic agents, as well as organic chlorine agents and organic sinoacic acid agents, have been widely used as agricultural and horticultural fungicides, but all of these agents have a negative effect on soil. Because they are polluting and remain in the natural world and affect animals and plants, environmental pollution has become a major social issue, and their production has recently been banned. ' Also, citrus fruits and cane crops are transported to remote areas.
The damage caused by various rotting fungi caused by rotting bacteria during L storage is also severe, and for this reason, sulfur-containing compounds are used as control agents. It is undesirable from the perspective of environmental pollution, as it cannot be harvested unless it is harvested.

For this reason, there is a strong demand for the development of highly safe and non-polluting pesticides, and as a result of intensive research from this perspective, the present inventors have found that each of the above-mentioned compound groups is capable of controlling diseases caused by plant pathogens. Furthermore, the present invention was completed based on the new findings that it is highly effective in controlling storage diseases of harvested crops and does not have any effect on plants or harvested crops.

The active ingredients of the present invention, potassium hydroxide, sodium hydroxide, and calcium hydroxide, are known as caustic potash, caustic soda, and slaked lime, respectively, and are widely used as raw materials for soap, various reagents, soil neutralizing agents, etc. There is. Furthermore, peronal, sodium-hydrochloric acid, Tris, ethanolamine, P-NaOH and B-NaOH (P-NaOH and B-NaO)-1 will be explained later. ) etc. are used as buffering agents in numerous chemical experiments.They are completely harmless to humans and animals, do not require the utmost care in handling like conventional chemicals, and are environmentally friendly due to residual poison. Since there is no concern about contamination, it has excellent properties as a so-called non-polluting pesticide, and the buffer solution can also be applied as is.

The present invention was completed based on the knowledge that the effects of sterilizing microorganisms and controlling storage diseases are significantly exhibited under pH conditions, that is, on the alkaline side. g~/yu, especially h g -g, !
It has the property of being able to maintain pH conditions in the range 4 of r.

Thus, the agent of the present invention is effective against various rice cultivation diseases, various plant diseases such as cucumber anthracnose, powdery mildew, citrus canker, etc., as well as various storage diseases of fruit and fruit trees, such as citrus canker. blue mold fungus (pe
nicillium ltalichum)
rl, Botrytis cinere
al, Dtaporthecitri, grape bunch rot fungus (Plysalospora bac
ae), peach anthracnose fungus (Gloeosporium I
It is completely harmless to humans and livestock and has an excellent control effect against diseases caused by A. aeticolor and the like. When the active ingredient of the present invention is used as a disinfectant and storage disease control agent for agricultural and horticultural purposes, it can be applied directly, or it can be applied to a suitable solid or liquid carrier according to methods for formulating agricultural chemicals commonly known in the art. , an emulsifying dispersant, etc. can be used to form any agent such as granules, powders, emulsions, aqueous agents, tablets, oils, sprays, atomizers, and the like.

Examples of these carriers include clay, kaolin, bentonite, acid clay, diatomaceous earth, calcium carbonate, etc., and auxiliary agents commonly used in formulations, such as interfacial agents such as spreading agents, dispersants, and emulsifiers. As activators, soap, higher alcohol sulfate esters, alkyl sulfonates,
Alkylaryl sulfonates and the like can be appropriately blended.

The appropriate blending ratio of the active ingredient of the present invention in the drug is about 10 to 90 g for emulsions, irrigation agents, etc., and about θ/ to 101 b for powders, oils, etc., but there are no particular limitations. However, these concentrations can be increased or decreased as appropriate depending on the purpose of use.

Furthermore, the agent of the present invention can also be used by appropriately mixing with other agents, such as herbicides and insecticides, fertilizers such as urea, ammonium sulfate, phosphoric acid, and potassium salts, soil conditioners, and the like.

Next, examples of the drugs of the present invention are shown (where parts indicate parts by weight) Examples/(Irrigation agent) Sodium hydroxide, 20 parts, white car 272 parts, ligninsulfonic acid sodium salt 2 parts, An irrigation agent made by mixing and pulverizing 4 parts of polyoxyethylene alkyl ether and 72 parts of clay. It is used after diluting it approximately 10θθ times with water.

Example 2 (Powder) A powder prepared by mixing 2 parts of calcium hydroxide and 9 g of talc.

Example 3 (emulsion) Potassium hydroxide, 20 parts, 70 parts of a /:/ mixture of polyoxyethylene alkyl allyl ether and sodium alkylaryl sulfonate, 20 parts of methanol, and 3 parts of water.
An emulsion prepared by mixing and dissolving 0 parts.

Example DA (granules) Granules prepared by mixing and pulverizing peronal, 70 parts of sodium-hydrochloric acid, 75 parts of starch, 72 parts of bentonite, and 3 parts of sodium salt of lauryl alcohol sulfate.

Next, the effects of the drug of the present invention will be specifically explained using test examples.

P-NaO)-1 and B-NaOH are seven types of Kragrubbs buffer, and P-NaOH is prepared by dissolving potassium dihydrogen phosphate and sodium hydroxide in 15 mol/l of water. B-NaOH is prepared by dissolving potassium borate and sodium hydroxide in /S mole/L water.

Test example/(Cucumber anthracnose control test) a) Two-week-grown seedlings of test plant cucumber (variety: Sumo Hanshiro) (planted in 2-3 2-inch pots) b) Test chemical solution according to Example 3 diluted emulsion (concentration 2SO0)
Spray ti-o- (0 ppm) onto two pots evenly.

Cucumber anthracnose pathogen (Col Ietotrichu)
mIagenar 1 urrl on slant medium at xg℃/
The spores were cultured for a week to form spores, and the spores were suspended in pure water and examined under an ISO magnification microscope.The 00 mK-adjusted solution was sprayed onto 23 pots of the above seedlings using a spray gun. Inoculated. After inoculation, the plants were allowed to develop disease in a greenhouse for a day, and the degree of disease onset was investigated using q apertures.

The results are shown in Table 1.

( , l Pi / Table Test Example 2 (Mandarin orange storage disease control test) A test fruit of Satsuma mandarin orange was immersed in a chemical solution of a prescribed concentration (an irrigation agent prepared according to Example/) for about S minutes, and then air-dried. After an hour, a needle was inserted into a rubber block of about 7 cm cube so that it protruded by about /mm, and the needle was pressed against the upper surface of the fruit at q points (/points: 5 needles) to make an I't.After this treatment, the green Fungal pathogens (p
A spore suspension (E. enlcillium digitatum) was spray inoculated onto the injured part of the test fruit. The treated fruits were kept at a humidity of approximately 100 degrees Celsius, and the state of decay was examined after 3 to S days.

The results are shown in Table 2.

Table 2 Test Example 3 (Mandarin orange storage disease control test) A test fruit (Unshu mandarin orange) was damaged according to the wound test method of Test Example 3, and then a chemical solution of a prescribed concentration (hydration prepared according to Example/ The test fruit was immersed in the green mold agent for about S minutes, and after air-drying, it was soaked in green mold pathogen (penicillium digitat
um) The spore suspension was spray inoculated onto the injured part of the test fruit. The treated fruits were kept at a humidity of about 100 degrees Celsius and the state of decomposition was examined after 3 to S days, and the results shown in Table 3 were obtained.

Test Example t (Mandarin Orange Storage Disease Control Test) According to Test Example 20 Injury Test Method, after the test fruit (Unshu mandarin orange) was injured, green mold pathogen (Pen ic i l I
um digitatum) spore suspension was spray inoculated onto the injured part of the test fruit. After 2 q hours, the treated rice was immersed in a chemical solution of a predetermined concentration (an irrigation agent prepared according to Example/) for about S minutes, air-dried, and then placed at a humidity of 7
00%, and the state of decomposition was examined on the scale.

The results are shown in Table 4.

Part 1 test example! (Rice blast disease control test) Paddy rice (variety Nijukoku) was sown directly into cultivation pots (70 pots/pot), and an irrigation agent prepared according to Example/ was sprayed during the Q to S leaf stage, and after drying. , rice blast fungus (piriculara)
oryzae) f: Spray inoculation. Inoculation was carried out in a rice husk medium (3 g of rice husk, powdered yeast extract θ0/g, sugar θY, starch θO 3 g, water, ltm) at 27°C, 7 to 7 days.
Rice blast pathogenic fungus spores cultured for 0 days are made into a suspension and inoculated by spraying in an inoculation box. After inoculation, No. 2 is left in a constant temperature and humidity cylinder at 2S° C. for an hour, and then a vinyl tent is stretched over a vat filled with water and left in the tent. After inoculation, the disease develops 5 to 7 days after inoculation. After the onset of the disease, the number of lesions per pot was investigated, the control value was calculated, and the efficacy was examined, and the results shown in Table 5 were obtained.

The method for calculating the control value is the same as in Test Example/.

Table 5 Patent applicant: RIKEN

Claims (1)

[Claims] Potassium hydroxide, sodium hydroxide, hydroxide power,,
, lucium, - water/nal, sodium - hydrochloric acid, tri)
ゝ,′””,+,,xtanolamine, P-NaO
1. A disinfectant and storage disease control agent for agricultural and horticultural use, characterized in that it contains seven or more selected from the group consisting of H and B-NaOH as active ingredients.