JP4212194B2 - 5-methylisoxazole composition with enhanced efficacy - Google Patents

Description

【００４２】

【００４３】

【００４４】
【試験例２】
水和剤の種子粉衣試験｛テンサイ苗立枯病（アファノマイセス及びピシウム）｝
実施例３又は４に準じて調製した水和剤の所定量を、２％アラビアゴム液と共にテンサイ種子（品種：モノミドリ）に粉衣処理した。
【００４５】
一方、アファノマイセス菌及びピシウム菌に汚染された土壌を直径２０ｃｍのプラスチックポットに充填し、そこに粉衣処理したテンサイ種子を播種し、ポットをガラス室に置き育成した。３週後に、苗立枯病発病率を調査した。その結果を表２に示す。
【００４６】
【表２】

【００４７】
【試験例３】
リンゴ果実の着色促進試験
実施例５又は６に準じて調製した液剤を所定濃度に稀釈した散布液を、リンゴの成木（無袋栽培、１５年生、品種：フジ）に、果実が色付き始める前から１０日間隔で３回散布した。収穫時に、４０個の果実の着色面積及び重量を調査し、果実の平均着色面積の割合及び無処理を１００とした場合の果実の重量指数を求めた。その結果を表３に示す。
【００４８】
【表３】

【００４９】
【発明の効果】
本発明の農園芸用組成物は、土壌病害をはじめとする種々の植物病害に対して相乗的に防除効果を示す。
【００５０】
本発明の農園芸用組成物は、広い効力スペクトルを示し、本組成物が優れた効力を発揮する植物病害としては、例えば、イネの苗立枯病（Fusarium sp. Pythium sp.）、テンサイの苗立枯病（Aphanomyces sp.）、ウリ類のつる割病（Fusarium oxysporum）、野菜・果樹等のえき病（Phytophthora sp.）、ブドウのべと病（Plasmodiophora brassicae）、芝草のフザリウム病、ピシウム病等が挙げられる。
【００５１】
更に、本発明の農園芸用組成物は植物の成長に及ぼす効果を有し、その効果としては、例えば、発根の促進、生体重増加、野菜・果実等の肥大及び増収、糖度の増加、果実の着色促進、切花の延命効果等が挙げられる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural and horticultural composition containing 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof, and particularly to an agricultural and horticultural bactericidal composition and an agricultural and horticultural plant growth regulating composition.
[0002]
[Prior art]
Soil diseases of various crops caused by soil pathogens have long been a major problem in crop cultivation and farm management due to the magnitude of damage and difficulty in controlling them. In recent years, from the rationalization of cultivation and distribution, various crops are cultivated intensively with highly durable facilities or equipment, and the cultivation of various crops has been specialized, and a single crop is the same soil There are an increasing number of cases of continuous cultivation. From such a situation, soil diseases frequently occur in institutional cultivation and outdoor cultivation, which causes great damage to crop cultivation and often causes no harvest. Fusarium bacteria, Psium bacteria, Aphanomyces bacteria, and Rhizoctonia bacteria are known as representative soil pathogenic bacteria that cause such soil diseases.
[0003]
At present, 5-methylisoxazole and its salts are widely used as a drug that widely controls soil diseases caused by various soil pathogens and has high environmental safety. It is widely used for controlling seedling blight of various crops (due to Psium and Fusarium), fusarium wilt disease of various crops, and sugar beet seedling blight (due to Aphanomyces). Moreover, these diseases can be controlled not only by directly treating the soil but also by treating the seeds.
[0004]
In addition, 5-methylisoxazole and its salts increase the vitality of plant roots and have an effect of improving physiological activities such as growth promotion, that is, the development of new roots is promoted, and rooting at the time of plant transplantation is promoted. It is known that the accompanying decrease in root physiology is compensated and prevented (Japanese Patent Publication No. 59-18362).
[0005]
On the other hand, phosphorous acid and salts thereof are known to exhibit plant disease control activity (Japanese Patent Publication No. 56-41603) and fertilizer effect (US Pat. No. 5,514,200), but the effect is sufficient Not.
[0006]
[Problems to be solved by the invention]
As a result of intensive investigations into the development of drugs and treatment methods corresponding to such situations, the present inventors have made compositions for agriculture and horticulture containing 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof. It was found that the product exhibits a higher control effect at a lower concentration than that of a single agent, exerts preventive and therapeutic effects on various types of diseases, and further has a remarkable plant growth action, thereby completing the present invention.
[0007]
[Means for Solving the Problems]
The present invention provides an agricultural and horticultural composition containing 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof, and a method used as an agricultural and horticultural fungicide or a plant growth regulator.
[0008]
The salt of 5-methylisoxazole (hereinafter referred to as Compound Ia) of the present invention is not particularly limited as long as it can be used as an ordinary agricultural chemical, but for example, potassium salt (hereinafter referred to as Compound Ib). Alkali metal salts such as sodium salts; alkaline earth metal salts such as calcium salts and magnesium salts; or ammonium salts, including hydrates thereof, and preferably potassium salts.
[0009]
The 5-methylisoxazole or a salt thereof of the present invention is preferably 5-methylisoxazole or a potassium salt thereof.
[0010]
The salt of phosphorous acid (hereinafter referred to as compound II) of the present invention is, for example, an alkali metal salt such as potassium salt or sodium salt; or an alkaline earth metal salt such as calcium salt. Is a potassium salt or a calcium salt.
[0011]
The phosphorous acid or salt thereof of the present invention is preferably phosphorous acid or a potassium salt or calcium salt thereof, and particularly preferably potassium salt or calcium salt of phosphorous acid.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The method for producing 5-methylisoxazole or a salt thereof which is an active ingredient of the present invention is, for example, Sankyo Research Institute Annual Report Vol. 25, page 1 (1973), Japanese Patent Publication No. 42-2440, Japanese Patent Publication No. 48-388148. And Japanese Patent Publication No. 44-31357.
[0013]
The mixing ratio of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof as an active ingredient of the present invention is such that phosphorous acid or a salt thereof is 1 part by weight of 5-methylisoxazole or a salt thereof. Usually, it is 0.1 to 100 parts by weight, and preferably 0.5 to 5 parts by weight.
[0014]
In addition to 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof, the agricultural and horticultural composition of the present invention may contain an auxiliary agent commonly used in the field of agrochemical formulations.
[0015]
As auxiliary agents used, for example, mineral fine powders such as clay, talc, calcium carbonate, white carbon, titanium dioxide; starch derivatives such as starch and esterified starch, dextrin, glucose, fructose, saccharose such as sucrose Nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, oxyethylene oxypropylene block copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester; alkylbenzene sulfonate, alkyl naphthalene sulfonic acid Salt, dioctyl sulfosuccinate, phosphoric acid or sulfate ester salt of polyoxyethylene alkyl or alkyl allyl ether, β-naphthalenesulfonic acid formalin condensate , Lignin sulfonates, polycarboxylic acid type and / or polysulfonic acid type polymer surfactants, anionic surfactants such as condensed phosphates (sodium hexametaphosphate, sodium tripolyphosphate); alginic acid and its salts, carboxy Water-soluble polymer compounds such as water-soluble polysaccharides such as methyl cellulose and its salts, methyl cellulose, polyvinyl alcohol, sodium polyacrylate, polyethylene oxide, polyvinyl pyrrolidone, xanthan gum; ethylene-vinyl chloride copolymer resin powder, ethylene vinyl acetate copolymer Combined powder, thermoplastic resin powder such as vinyl chloride resin powder, solvent such as ethylene glycol, propylene glycol, N-methylpyrrolidone, 3-methyl-3-methoxybutanol, dipropylene glycol; parahydroxybenzoate And antimicrobial agents such as lower alkyl (methyl, ethyl, propyl, butyl) esters of perfume acid and 1,2-benzisothiazolin-3-one (BIT).
[0016]
The agricultural and horticultural composition of the present invention can be formulated by a known method, for example, a capsule made of a paste, solution, suspension, emulsion, wettable powder, water solvent, powder, polymer substance. Can do.
[0017]
The composition for agricultural and horticultural use of the present invention is prepared by undiluting the raw material or the preparation as it is or by diluting with water or the like to prepare a spray solution, for example, spraying or dusting plants, water surface such as paddy fields, or soil. It can be sprayed on the surface, dusted or sprinkled, mixed with soil, or applied to a rice seedling box. Furthermore, when using the said formulation as a seed treatment agent, a seed dressing process or a seed immersion process can be performed, for example.
[0018]
The agricultural and horticultural composition of the present invention may or may not contain other fungicides, insecticides, acaricides, nematicides, plant preparations, herbicides, seed disinfectants, fertilizers or soil conditioners. Can be used simultaneously with other fungicides or insecticides, particularly for the purpose of enhancing the fungicidal efficacy. Examples of the fungicide used include dithiocarbamate fungicides such as manzeb and dineb, simoxanyl, metalaxyl, and dimethomorph.
[0019]
The application amount of the composition for agricultural and horticultural use of the present invention is the mixing ratio of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof, meteorological conditions, formulation form, application time, application method, application place, target disease. The amount of 5-methylisoxazole or a salt thereof, which is an active ingredient per are, is usually 0.01 to 1000 g, preferably 1 to 200 g, although it varies depending on the target location.
[0020]
When the emulsion, wettable powder, suspension, liquid, etc. of the agricultural and horticultural composition of the present invention are diluted with water and applied, the application concentration of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof is , Usually 0.0001 to 1%, preferably 0.001 to 0.5%.
[0021]
When seeding the agricultural or horticultural composition of the present invention, the application amount of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof is usually 0.001 to 50 g per 1 kg of seeds, preferably 0.01 to 10 g.
[0022]
When the agricultural or horticultural composition of the present invention is treated with soil, the application amount of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof is usually 0.01 to 1000 g per are, preferably 0.1 to 100 g.
[0023]
When the agricultural and horticultural composition of the present invention is treated in a seedling box, the application amount of 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof is usually 0.1 per 30 seedling boxes of 30 cm × 60 cm × 3 cm. 1 to 100 g, preferably 1 to 50 g.
[0024]
When the composition for agricultural or horticultural use of the present invention is used in a rice cultivation scene, the composition can be used from the time when rice seedlings are cultivated in a nursery box or the preparation time to the time after rice planting and harvest time. The effect lasts for a long time.
[0025]
When the composition for agricultural and horticultural use of the present invention is used in a fruit tree / vegetable scene, the present composition can be used at the entire growth stage of each crop.
[0026]
Hereinafter, the present invention will be described in more detail with reference to examples and test examples, but the present invention is not limited to these examples. In addition, "part" in an Example shows weight% unless there is particular notice.
[0027]
【Example】
[0028]
[Example 1]
Granule Compound Ia (2.5 parts), Compound II (3.5 parts), synthetic silicon hydroxide (1 part), calcium lignin sulfonate (2 parts), bentonite (30 parts) and kaolin clay (remainder) After thoroughly pulverizing and mixing, adding water and kneading well, granulation and drying are performed to obtain a granule containing 2.5% of compound Ia.
[0029]
[Example 2]
Granule compound Ib (2.5 parts in terms of free acid), compound II (3.5 parts), synthetic hydrous silicon oxide (1 part), calcium lignin sulfonate (2 parts), bentonite (30 parts) and The kaolin clay (remainder) is pulverized and mixed well, and water is further added and kneaded. Then, the mixture is granulated and dried to obtain a granule containing 2.5% of compound Ib in terms of free acid.
[0030]
[Example 3]
The wettable powder compound Ia (25 parts), compound II (35 parts), calcium lignin sulfonate (3 parts), sodium lauryl sulfate (2 parts) and synthetic silicon hydroxide (remainder) are thoroughly pulverized and mixed to obtain compound Ia. A wettable powder containing 25% was obtained.
[0031]
[Example 4]
Wet powder compound Ib (25 parts in terms of free acid), compound II (35 parts), calcium lignin sulfonate (3 parts), sodium lauryl sulfate (2 parts) and synthetic hydrous silicon oxide (remainder) By mixing, a wettable powder containing 25% of compound Ib in terms of free acid was obtained.
[0032]
[Example 5]
Liquid Compound Ia (20 parts), Compound II (28 parts), Solfit (manufactured by Kuraray) (40 parts) and water (remainder) were thoroughly mixed and dissolved to obtain a liquid containing 20% of Compound Ia.
[0033]
[Example 6]
Liquid Compound Ib (20 parts in terms of free acid), Compound II (28 parts), Solfit (manufactured by Kuraray) (40 parts) and water (remainder) are thoroughly mixed and dissolved, and Compound Ib is converted to free acid. To give a solution containing 20%.
[0034]
[Example 7]
Add water (2.06 parts) to a beaker containing dust compound II (3.5 parts), stir well, and add potassium hydroxide (purity 85.0%) (5.35 parts) to neutralize. A colorless and transparent liquid was obtained. This liquid was absorbed into Carplex 80-D (manufactured by Shionogi, white carbon) (9.57 parts), loosened by hand, and pulverized with a sample mill to obtain a phosphorous acid premix.
[0035]
Compound Ia (2.5 parts), the above phosphorous acid premix (20.48 parts) and wand clay (manufactured by Keiwa Furnace Co., Ltd.) (remainder) were mixed and ground again in a sample mill, and compound Ia was A powder containing 2.5% was obtained.
[0036]
[Example 8]
Add water (2.06 parts) to a beaker containing dust compound II (3.5 parts), stir well, and add potassium hydroxide (purity 85.0%) (5.35 parts) to neutralize. Thus, a colorless and transparent liquid is obtained. This liquid was absorbed into Carplex 80-D (manufactured by Shionogi, white carbon) (9.57 parts), loosened by hand, and pulverized with a sample mill to obtain a phosphorous acid premix.
[0037]
Compound Ib (2.5 parts in terms of free acid), phosphorous acid premix (20.48 parts) and wand clay (Keiwa Furnace Co., Ltd.) (remainder) were mixed again in the sample mill. By grinding, a powder containing 2.5% of compound Ib in terms of free acid was obtained.
[0038]
[Example 9]
Add Compound Ia (10 parts), Compound II (14 parts) and potassium hydroxide (purity 85.0%) (22.6 parts) to a beaker containing liquid water (53.4 parts), and mix and dissolve well. As a result, a solution containing 10% of compound Ia was obtained.
[0039]
[Test Example 1]
Solution seedling box floor soil irrigation test (rice seedling blight / rooting promotion)
Paddy field soil contaminated with Psium and Fusarium was placed in a seedling box of 30 cm × 60 cm × 3 cm, and rice seeds (variety: Kofu) were sown there. A predetermined amount of the solution prepared according to Example 5 or 6 was prepared, irrigated into the seedling box soil, the seedling box was placed in a greenhouse, and the seedlings were raised. Three weeks later, the incidence of seedling blight and the root tension of rice seedlings were investigated. The results are shown in Table 1. In addition, the active ingredient amount of the compound Ib in the following table | surface shows the value converted into the free acid. Also, the expected value of Colby is given by the formula
[Expression 1]
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 control value (%) expected for the combination of the two active ingredients. Indicates. ]
It was calculated | required by the calculation formula of Colby. Generally, 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 above Colby formula, The effect of the combination is determined to be synergistic.
[0041]
[Table 1]

[0042]

[0043]

[0044]
[Test Example 2]
Seed dressing test for wettable powders {Sugar seedling blight (Aphanomyces and Pysium)}
A predetermined amount of a wettable powder prepared according to Example 3 or 4 was powdered onto sugar beet seeds (variety: monomidori) together with 2% gum arabic solution.
[0045]
On the other hand, soil contaminated with Aphanomyces fungi and Psium fungus was filled in a plastic pot with a diameter of 20 cm, seeded with sugar beet seeds was sown there, and the pot was placed in a glass chamber and grown. Three weeks later, the incidence of seedling blight was investigated. The results are shown in Table 2.
[0046]
[Table 2]

[0047]
[Test Example 3]
Coloring promotion test for apple fruit Before the fruit begins to color on the mature apple tree (no-bag cultivation, 15-year-old, varieties: Fuji), a solution prepared by diluting the liquid prepared according to Example 5 or 6 to a predetermined concentration And sprayed three times at 10 day intervals. At the time of harvest, the colored areas and weights of 40 fruits were examined, and the ratio of the average colored area of the fruits and the weight index of the fruits when no treatment was taken as 100 were determined. The results are shown in Table 3.
[0048]
[Table 3]

[0049]
【The invention's effect】
The composition for agricultural and horticultural use according to the present invention exhibits a control effect synergistically against various plant diseases including soil diseases.
[0050]
The agricultural and horticultural composition of the present invention exhibits a broad spectrum of efficacy, and examples of plant diseases for which the composition exhibits excellent efficacy include, for example, rice seedling blight (Fusarium sp. Pythium sp.), Sugar beet Seedling blight (Aphanomyces sp.), Cucumber vines (Fusarium oxysporum), vegetables and fruit trees (Phytophthora sp.), Grape downy mildew (Plasmodiophora brassicae), turfgrass Fusarium disease, Psium Diseases and the like.
[0051]
Furthermore, the composition for agricultural and horticultural use of the present invention has an effect on the growth of plants. Examples of the effects include promotion of rooting, increase in body weight, enlargement and increase of vegetables and fruits, increase in sugar content, Examples include the promotion of fruit coloring and the effect of extending the life of cut flowers.

Claims (3)

An agricultural and horticultural composition containing 5-methylisoxazole or a salt thereof and phosphorous acid or a salt thereof. The composition according to claim 1, wherein the agricultural and horticultural composition is an agricultural and horticultural bactericidal composition. The composition according to claim 1, wherein the agricultural and horticultural composition is an agricultural and horticultural plant growth regulating composition.