JP2517270B2 - Agricultural and horticultural sterilizing composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention effectively uses 1-ethyl-1,4-dihydro-6,7-methylenedioxy-4-oxo-3-quinolinecarboxylic acid and streptomycin. The present invention relates to an agricultural and horticultural germicidal composition, which is contained as an ingredient.

<Prior art> Until now, for controlling plant bacterial diseases, inorganic and organic copper agents, etc.
Agro-horticultural fungicides having a therapeutic effect, such as agricultural-horticultural fungicides having a preventive effect and streptomycin, have been generally used.

<Problems to be solved by the invention> However, since the above-mentioned copper agent has a broad antibacterial spectrum but does not have a therapeutic effect, it is often not possible to exert a sufficient effect. It is hard to say that it cannot be said to be sufficiently satisfactory as an agricultural and horticultural fungicide such that sufficient effect cannot be expected unless it is used in an extremely large amount of 2-3 kg / ha.

In addition, streptomycin showed an excellent plant disease control effect at the beginning of development, but due to the emergence of resistant bacteria, it is not always sufficient as an agricultural and horticultural fungicide because a sufficient practical control effect cannot be expected in many plant diseases at present. It is hard to say that you can be satisfied with.

<Means for Solving Problems> In view of such a situation, the present inventors have made diligent studies in order to develop an excellent agricultural and horticultural fungicide for controlling plant bacterial diseases. -1,4-dihydro-6,7-methylenedioxy-4-oxo-3-quinolinecarboxylic acid (hereinafter referred to as compound A) and streptomycin (hereinafter referred to as compound B) are contained as active ingredients. The inventors have found that the agricultural and horticultural germicidal composition has not only the above-mentioned various properties but also a synergistic effect, and the present invention has been completed.

That is, the present invention provides an excellent agricultural and horticultural bactericidal composition containing compound A and compound B as active ingredients (hereinafter referred to as the composition of the present invention).

 The present invention will be described below.

Compound A, which is one of the active ingredients of the composition of the present invention, is a systemic plant disease controlling agent described in JP-B-57-48042, but has a rather narrow disease spectrum showing a practical controlling effect. I have a hate.

The other active ingredient, compound B, is not showing a sufficient practical control effect against many plant diseases at present due to the emergence of resistant bacteria.

The composition of the present invention contains two kinds of compounds, but not only exerts a simple complementary effect of each single agent, but also exerts an excellent synergistic effect. The expression of a synergistic effect by mixing two kinds of compounds as described above not only brings about efficient control of plant diseases and economic merit, but also enables reduction of application amount of each component. Also, it is preferable in terms of safety such as environmental pollution.

Examples of plant diseases that can be controlled by the composition of the present invention include soft rot of various vegetables (E.carotovora), black leg of potato (E.atroseptica), and bacterial wilt of the Solanaceae (P.solanac).
earum), Bacterial spot disease of cucumber (P.lachrymans), Black spot bacterial disease of vegetables (P.syringae pv.maculicola), Black rot (X.campestyis), Crown rot (A.tumefacien)
s), tomato ulcer disease (C. michigananense), rice blight bacterial disease (P. glumae), tobacco field fire disease (P. tabaci) mandarin orange scab (X. campestris pv citri), rice white leaf blight (X. oryzae) and the like.

The composition of the present invention can be used as a plant disease control agent for upland fields, paddy fields, orchards, tea gardens, meadows, lawns, etc., and by using it in combination with other plant disease control agents, it has a bactericidal effect. It can be expected to increase. In addition, insecticides,
It can also be used as a mixture with acaricide, nematicide, herbicide, plant growth regulator, and fertilizer.

When the composition of the present invention is used as an active ingredient of a bactericide, it may be used as it is without adding any other ingredient,
Usually, it is mixed with a solid carrier, a liquid carrier, a surfactant and other auxiliaries for formulation and used as a formulation such as an emulsion, a wettable powder, a suspension, a powder and a liquid. In this case, the mixing ratio of the active ingredients, compound A and compound B, is 1: 0.1 to 1:10 by weight, preferably 1: 0.2 to 1: 5, and the content of the active ingredient in these preparations is It is 0.1 to 99.9%, preferably 1 to 90%.

As the above-mentioned solid carrier, kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite, corn cob powder, walnut shell powder, urea, ammonium sulfate, synthetic silicon oxide hydroxide, etc. Examples of the liquid carrier include powders or granules, and xylene, aromatic hydrocarbons such as methylnaphthalene, isopropanol, ethylene glycol, alcohols such as cellosolve, acetone, cyclohexanone, and the like.
Ketones such as isophorone, vegetable oils such as soybean oil and cottonseed oil,
Examples thereof include dimethyl sulfoxide, acetonitrile, water and the like.

Surfactants used for emulsification, dispersion, wet extension, etc. include alkyl sulfate ester salts, alkyl (aryl) sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkyl aryl ether phosphate ester salts, naphthalene sulfonic acid. Examples thereof include anionic surfactants such as formalin condensates, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene block copolymers, nonionic surfactants such as sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters.

Pharmaceutical adjuvants include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC
(Carboxymethyl cellulose), PAP (isopropyl acid phosphate) and the like.

As a method of applying the composition of the present invention, when used as an agricultural and horticultural fungicide, foliar application, soil treatment, seed disinfection, etc. are mentioned, but any application method usually used by those skilled in the art is sufficiently effective. Exert.

When the composition of the present invention is used as an active ingredient of a plant disease control agent, the application amount of the active ingredient is a target crop, a target disease, a degree of disease occurrence, a formulation form, an application method, an application time,
It is usually 0.5 per are although it depends on the weather conditions.
~ 200 g, preferably 1 to 100 g, when the emulsion, wettable powder, suspension, liquid, etc. are diluted and applied with water, the application concentration is 0.005-0.5%, preferably 0.01-0.2% Yes,
Apply powders, granules, etc. without any dilution.

<Example> Hereinafter, the composition of the present invention will be described in more detail with reference to formulation examples and test examples, but the present invention is not limited to these examples.

 First, formulation examples are shown. Parts represent parts by weight.

Formulation Example 1 25 parts of compound A, 25 parts of compound B, 3 parts of calcium lignin sulfonate, 2 parts of sodium lauryl sulfate and 45 parts of synthetic hydrous silicon oxide are well pulverized and mixed to obtain a wettable powder.

Formulation Example 2 Compound A (15 parts), compound B (10 parts), polyoxyethylene sorbitan monooleate (3 parts), CMC (3 parts) and water (69 parts) are mixed, and wet-pulverized until the particle size of the active ingredient is 5 μm or less to form a suspension agent. obtain.

Formulation Example 3 1 part of compound A, 1 part of compound B, 88 parts of kaolin clay and 10 parts of talc are well pulverized and mixed to obtain a powder.

Formulation Example 4 1 part of compound A, 1 part of compound B, 1 part of synthetic hydrous silicon oxide, 2 parts of calcium lignin sulfonate, 30 parts of bentonite and 65 parts of kaolin clay are well pulverized and mixed, and water is added and kneaded well, followed by granulation. Dry to obtain granules.

 Next, a test example is shown.

Test Example 1 Chinese cabbage soft rot control test (residual effect test) A plastic pot was filled with sandy loam soil, Chinese cabbage (60-day Chinese cabbage) was sown, and grown in a greenhouse for 30 days. Then, the reagent solution made into a wettable powder according to Formulation Example 1 was diluted with water to a predetermined concentration, and the foliage was sprayed so that it was sufficiently attached to the leaf surface. After spraying, the plants were cultivated in a greenhouse (20 ° C. during the day, 17 ° C. at night) for 7 days, and then wounded with a spore suspension of Chinese cabbage soft rot fungus. After inoculation, the plant was left under high humidity for about 18 hours, and further grown for 1 day under the above greenhouse conditions. Then, the disease state was investigated for each inoculated leaf.

 The survey method was as follows.

 The survey method was as follows.

That is, the degree of disease is determined by determining the diseased area ratio of the survey leaves,
The number of leaves η ₀ , η ₁ , η ₂ , η ₃ , η corresponding to each disease index is classified into ₀ , 0.5, ₁ , ₂ , 4 according to the degree.
₄ was investigated and calculated by the following formula, and then the control value was obtained.

The theoretical additive effect was obtained as follows.

The test results are shown in Table 1. Test Example 2 Cucumber spot bacterial disease control test (residual effect test) A plastic pot was filled with sandy loam soil, seeded with Cucumber (Sagamihanjiro), and grown in a greenhouse for 35 days. Then, the reagent solution made into a wettable powder according to Formulation Example 1 was diluted with water to a predetermined concentration, and the foliage was sprayed so that it was sufficiently attached to the leaf surface. After spraying, the plant was cultivated in a greenhouse (20 ° C. in the daytime, 17 ° C. at night) for 7 days, and then spray-inoculated with a spore suspension of the bacterial bacterium of the leaf spot of Cucumber plant. After inoculation, the mixture was left under high humidity for about 24 hours, and further grown under the above greenhouse conditions for 10 days. Then, the disease state was investigated for each inoculated leaf, and the control value was obtained in the same manner as in Test Example 1. The results are shown in Table 2.

<Effects of the Invention> The composition of the present invention has an excellent effect against plant diseases caused by bacteria, and thus can be used for various purposes as a very useful plant disease controlling agent.

Claims (1)

(57) [Claims] 1. Agro-horticultural sterilization comprising 1-ethyl-1,4-dihydro-6,7-methylenedioxy-4-oxo-3-quinolinecarboxylic acid and streptomycin as active ingredients. Composition.