JPS62195310A - Seed sterilizing agent - Google Patents

Abstract

PURPOSE:To provide a seed sterilizing agent containing (-)-(E)-1-(2,4- dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol as an active compo nent and exhibiting excellent effect at a low rate of application. CONSTITUTION:The objective seed sterilizing agent contains (-)-(E)-1-(2,4- dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol (a known fungicidal compound) as an active component. The agent exhibits excellent controlling effect against seed-infective blights at a low dose, has broad fungicidal spectrum and gives stable controlling effect even against microbial strain resistant to existing pesticides. The amount of the compound in the agent is 0.1-99.9wt%, preferably 0.2-80wt%. The agent is effective against various plant blight pathogens such as Septoria tritici, Leptosphaeria nodorum, Tilletia caries, Fusarium sp. (pathogens of wheat blights), Pyricularia oryzae (pathogen of rice blast), etc.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention provides (-)-(E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1°2.4 −
The present invention relates to an agricultural and horticultural seed disinfectant characterized by containing 1-lyazol-1-yl)-1-penten-8-ol (hereinafter referred to as compound (M)) as an active ingredient.

<Prior art> Conventionally, benomyl agents, thiophanate methyl agents, thiuram agents, carboxin agents, PONB agents, organic mercury agents, or mixtures thereof have been commercially available and used as seed fungicides for controlling seed-borne diseases. has been done.

<Problems to be solved by the invention> However, in order to obtain a sufficient effect, these drugs require a high dose, are effective against a limited number of diseases, and have conventional antibacterial properties. Resistant bacteria have emerged in some of the pathogenic bacteria that used to have this disease, and a decline in control effectiveness has become a problem.

In view of this situation, the present inventor conducted various studies in order to develop a seed disinfectant that is highly effective at a low dose, has a broad antibacterial spectrum, and has a stable disease control effect even against the above-mentioned resistant bacteria. As a result, the inventors found that the compound (A) is extremely suitable as an active ingredient of a seed disinfectant having the above-mentioned properties, leading to the present invention.

Means for Solving the Problems> That is, the present invention provides an excellent seed disinfectant containing the compound [mu] as an active ingredient.

The present invention will be explained below.

Compound (A) is known as one of a group of fungicidal compounds described in Tokoseki Publication No. 57-99575.

When the seed disinfectant of the present invention is used as a seed treatment agent, it is mixed with a carrier and a carrier, and if necessary, various formulation auxiliaries, such as a surfactant, a wetting agent, and a fixing agent, are used. , thickeners and stabilizers are added to produce wettable powders, powders,
It is used in formulations such as flowables and emulsions. The content of compound CAI as an active ingredient in these preparations is usually 0.1 to 99.9%, preferably 0.2 to 80% in terms of gravity ratio.
% range.

The carriers for the above preparations include fine powders or granules such as kaolin fleurite, attapulgite clay, bentonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite, walnut shell powder, urea, ammonium sulfate, and synthetic hydrous oxidized silica. monolithic carriers such as xylene, aromatic hydrocarbons such as methylnaphthalene, alcohols such as isopropanol, ethyl glycol, cellosolve, ketones such as acetone, cyclohexanone, isophorone, vegetable oils such as soybean oil and cottonseed oil, dimethyl Liquid carriers include sulfoxide, acetonitrile, water and the like. Surfactants used for emulsification, dispersion, wetting, etc. include alkyl sulfate salts, alkyl (aryl) sulfonate salts, dialkyl sulfosuccinate salts, polyoxyethylene alkylaryl ether phosphate salts, and naphthalene sulfonic acid salts. Anionic surfactants such as formalin condensates, nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene polyoxypropylene block copolymers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, etc. etc. Formulation aids include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC (carboxymethyl cellulose), PAP (isopropyl acid phosphate).
etc.

When the yuzu disinfectant of the present invention is treated with a yuzu powder, the amount used is usually 0.1% to 1 liter of the weight of the dried yuzu as a preparation base.
O% is appropriate, and when yuzu soaking treatment, the active ingredient is O, OU1~0.1% for dried seeds [1%
However, the amount used may vary depending on the form of the preparation and the type of yuzu crop to be treated. Furthermore, the seed disinfectant of the present invention can be used in combination with other fungicides and seed treatment TJMAIJ.

<Effects of the Invention> The seed disinfectant of the present invention has low chemical sensitivity, exhibits high control effects against various seed-borne diseases, has a broad antibacterial spectrum, and is effective against resistant bacteria that have developed resistance to conventional agents. It also shows a stable control effect against.

A specific example of a seed-borne disease for which the seed disinfectant of the present invention is effective is wheat leaf blight (8eptoriatyit).
ici), Leptospbaeria n
odor-um), sloth smut (Ti1leti
a caries), naked smut (Uszilago)
tritiai), seedling damping-off (Fusarium
8p, ), Coohliobolussat
ivus), barley spotted leaf disease (He1m1nth
os-poriuln gramineum), naked smut (Ustilag.

*1uda), Pyranophora t
eres), Rhynchosporium
5ecalis), blight (8epcoria s
p.), Uszilago ha-rd
ei), oat naked smut (Ustilago nv)
-anae), leaf blight (Pyronophora a
venae), limestone smut (Tilecia
oarias), rice blast disease (Pyricu
laria oryzae), sesame leaf blight (Coch
liobolus m1yabeanu! ! I) , stupid firefighter (Gibberella fujikuroi)
) Sudo is mentioned.

<Example> The present invention will be explained in detail below using formulation examples and test scissor examples.

Formulation Example 1 Powder Compound [2 parts of muco, 88 parts of kaolin clay, and 10 parts of talc are thoroughly ground and mixed to obtain a 2% powder.

Formulation Example 2 Wettable powder compound [10 parts of muco, ±55 parts of diatoms, 80 parts of white carbon, 8 parts of wetting agent (sodium lauryl sulfate) and 2 parts of dispersing agent (calcium lignin sulfonate) were thoroughly ground and mixed. A 10% hydrating powder is obtained.

Formulation Example 8 Suspending agent compound [5 parts of muco, 8 parts of polyoxyethylene sorbitan monooleate, C! A 6% suspension is obtained by mixing 8 parts of MO and 89 parts of water and wet milling until the particle size of the active ingredient is less than 5 square meters.

Formulation Example 4 Emulsion compound [5 parts of muco, 12 parts of emulsifier, 4 parts of cyclohexanone
6 parts of xylene and 88 parts of xylene were mixed to obtain a 5% emulsion.

Test Example 1 Wheat smut control effect The water of the present invention prepared according to Formulation Example 2 was applied to 10i of wheat Atsuko (variety: Norin No. 61) inoculated and infected with the wheat smut fungus (Tin tta oar-ies). Add a water dilution of a predetermined concentration of a Japanese preparation or a commercially available seed fungicide (Benlate T) to 2
After soaking for 4 hours, the seeds were sown in an il field and cultivation continued. After heading, the disease state of the ears was examined and the healthy seedling rate was calculated.

The results are shown in Table 1.

\5, \1, ゛・12, Test Example 2 Barley Spotted Leaf Disease Control Effect Barley Spotted Leaf Disease Fungus (Helminthosporium)
graminaum) infected with barley seeds (variety: Nie Golden) 109., the powder of the present invention or Benley) T (supra) prepared according to Formulation Example 1, respectively.
After that, the seeds were sown in the 11JI field and cultivation continued. The diseased state of the leaves was examined at the heading stage, and the healthy seedling rate was determined in the same manner as in Test Example 1.

The results are shown in Table 2.

Test Example 8 Rice brittle seedling disease control effect: Rice fir (Product 121: Kinki No. 33) contaminated with benomyl-susceptible and benomyl-resistant rice brittle seedling fungi (Gjbberella fujikuroj), respectively, according to Formulation Example 1: Made by A. After applying a predetermined amount of the powder of the present invention or Benlate T (extract 61), 100 seeds per pot were sown in plastic pots filled with sandy loam and covered with soil.

After cultivation in a greenhouse for 16 days, the disease state was investigated and the healthy seedling rate was determined in the same manner as in Test Example 1.

The results are shown in Table 8.

\、 \、 ′\ Procedural amendment (voluntary) March Otsu 2nd, 1986 Commissioner of the Patent Office Black 1) Separation, sir.

1. Indication of the case 1986 Patent application No. Gudo n 2. Name of the invention Seed disinfectant 3. Person making the amendment Relationship to the case Patent applicant 5-15-4 Kitahama, Higashi-ku, Osaka, agent Higashi, Osaka Address: 5-15 Kitahama, Ward Contact: Tn (06) 220-34045 Column 6 of the detailed description of the invention in the specification subject to amendment It can be used for light treatment, wiping treatment, etc.

When the seed disinfectant of the present invention is used for seed dressing and dusting treatment, the amount used is usually in the range of 0.00001 to 1% of the dry seed weight as the amount of active ingredient. In this case, the treatment concentration of the active ingredient is preferably in the range of 0.01"1,100,000 pp, but such amount may vary depending on the form of the preparation and the type of crop seed to be treated."

that's all

Claims (1)

[Claims] (-)-(E)-1-(2,4-dichlorophenyl)-
4,4-dimethyl-2-(1,2,4-triazole-
A seed disinfectant characterized by containing 1-yl)-1-penten-3-ol as an active ingredient.