KR19980086611A - Fungicide Composition - Google Patents

Abstract

As active compound

A) tifluzamide and

B) Dimuron

The novel composition containing is very effective as a fungicide and shows excellent tolerability to plants.

Description

Fungicide Composition

The present invention relates to a novel composition having fungicidal properties. This composition contains on the one hand known and on the other hand known 1- (1-methyl-1-phenylethyl) -3-p-tolyl-urea.

It is already known that (common name: thifluzamide) has fungicidal activity (see JP-A (Japanese published patent application) Pyeongseong 4-15 228 and British Crop Protection Conference, Pests and Diseases 1992, 429-432). However, when tifluzamide is applied to the mother bed, it exhibits phytotoxicity to rice in certain cases.

In addition, 1- (1-methyl-1-phenylethyl) -3-p-tolylurea (common name: dymuron) can be used as a herbicide in paddy fields, as well as in bulrush and cowhide ( It is already known to have a herbicidal effect on cow hair). It is also known that dimuron can be used as an emollient to reduce the phytotoxicity of sulfonylurea herbicides (JP-A (Japanese published patent application) digestion 48-35 454).

According to the present invention as an active ingredient

A) of Formula 1

(Tifluzamide) and B) 1- (1-methyl-1-phenylethyl) -3-p-tolylurea of the formula

(Dimuron)

It has been found that new compositions containing a combination of have very good fungicidal activity and that plants have good tolerability.

Surprisingly, the compositions according to the invention show not only strong fungicidal action than using tifluzamide alone, but also much lower phytotoxicity. It was not known in the art to use dimuron as a stabilizer of fungicides, so this effect could not be expected in the prior art.

The composition according to the invention can be used to control fungi without damaging the crops grown in agriculture. In particular the composition according to the invention is suitable for controlling fungi in rice.

Good fungicidal effects and good tolerability to plants are evident especially when the active compounds are present in the composition according to the invention in certain weight ratios. However, the weight ratio of the active compound can be changed within a relatively wide range. Generally about 0.1 to 3 parts by weight, preferably 0.5 to 1.5 parts by weight of the compound of formula (2) is used per 1 part by weight of the compound of formula (1).

The composition according to the invention exhibits good fungicidal activity and can be used to control phytopathogenic fungi by, for example, foliar application, underwater application, soil treatment, soil incorporation application, or seedling box treatment.

The composition according to the present invention is mainly Plasmodiophoromycetes (Plasmodiophoromycetes), Ohmycetes (Oomycetes), Kitrididiomycetes (Chytridiomycetes), Zygomycetes, Ascomycetes (Ascomycetes) It can be used to control pathogenic sedative fungi (Eumycetes), such as Basidiomycetes and Deuteromycetes. In particular, the composition according to the present invention is suitable for controlling diseases of cereals belonging to the genus of Thanatephorus, Rhizoctonia, Puccinia, Corticium, Ustilago, etc. Do.

The plant exhibits good resistance to this when the composition according to the invention is used at the concentrations necessary for the control of plant diseases, and thus, by using the composition according to the invention, the above-ground part of the plant, propagation material for the plant, seeds, and soil Can be processed.

The compositions according to the invention can be converted into conventional formulations such as hydrating agents, emulsions, tablets, suspensions, powders, foams, pastes, granules, aerosols, very fine capsules in polymeric materials, and coating compositions for seeds. And other forms of formulations, such as ULV formulations. In addition, the compositions according to the invention can be prepared by tank-mixing optionally prepared tifluzamide and optionally prepared dimuron.

Such formulations are known methods per se, for example, mixing the active compound or combination of active compounds with a liquid solvent, liquefied gas under pressure, and / or an extender which is a solid carrier, and then optionally emulsifiers and / or The surfactants, which are dispersants and / or foaming agents, may be prepared by mixing together, or optionally by molding thereafter.

Liquid solvents are generally not only water but also aromatic hydrocarbons such as xylene, toluene or alkylnaphthalene, chlorinated aromatic hydrocarbons such as chlorobenzene, chloroethylene or methylene chloride or chlorinated aliphatic hydrocarbons, aliphatic hydrocarbons such as cyclohexane, or mineral Alcohols such as paraffin, butanol or glycol and their ethers and esters such as oil fractions and ketones such as acetone, methylethylketone, methyl isobutyl ketone or cyclohexanone, strong polar solvents such as dimethylformamide and dimethylsulfoxide are suitable Do. In addition, when water is used as a solvent, for example, an organic solvent can be used as a cosolvent.

As the liquefied gas type extender, liquids such as gas such as butane, propane, nitrogen and carbon dioxide, as well as aerosol injectors such as halogenated hydrocarbons, can be used at room temperature and atmospheric pressure.

Suitable solid carriers are, for example, ground natural minerals such as kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth, and ground synthetic minerals such as highly dispersed silica, alumina and silicates.

Solid granules for granules can be used, for example, synthetic or granulated inorganic or organic coarse powder, as well as crushed and classified natural rocks such as calcite, marble, pumice, calcite and dolomite, and also sawdust, coconut husk, corn cob, Granules of organic substances such as tobacco stems can be used.

Emulsifiers and / or foaming agents are, for example, albumin hydrolysis products, as well as polyoxyethylene fatty acid esters, for example polyoxyethylene fatty acid alcohol ethers such as alkylaryl polyglycol ethers, alkylsulfonates, alkylsulfates, arylsulfonates Nonionic and anionic emulsifiers such as are suitable.

Dispersants include, for example, lignin-sulfite waste liquors and methylcellulose.

Other additives such as mineral and vegetable oils, as well as powders such as gum arabic, polyvinyl alcohol and polyvinylacetate, carboxymethylcellulose in the form of granules or latex and adhesives such as natural and synthetic polymers, natural phospholipids such as cephalin and lecithin and Synthetic phospholipids can be used in the formulation.

Inorganic pigments such as, for example, iron oxides, titanium oxides and Prussian blues, and colorants such as organic dyes such as alizarin dyes, azo dyes and metal phthalocyanine dyes, and for example iron, manganese, boron, copper, cobalt, molybdenum And trace nutrients such as metal salts such as tin.

The formulations generally contain 0.1-95% by weight, preferably 0.5-90% by weight of active compound.

The compositions according to the invention may further be used in combination or in admixture with fertilizers and plant growth regulators as well as other active compounds such as fungicides, insecticides, acaricides and herbicides.

The following compounds may be mentioned as examples of active ingredients, which may be used in combination or in admixture with the compositions according to the invention.

Fungicide Compounds:

And carpropamide), 5-methyl-1,2,4-triazolo- [3,4-b] benzothiazole (common name: tricyclazol), 3-allyloxy-1 , 2-benzoisothiazole-1,1-dioxide (common name: probenazole),

Pesticides or Acaricides Compounds:

1- (6-chloro-3-pyridylmethyl) -N-nitroimidazolidine-2-ylideneamine (common name: imidacloprid), 2-isopropoxyphenyl-N-methylcarbamate (Common name: propoxur), O, O-diethyl-S-2- (ethylthio) -ethylphosphoro-dithioate (common name: ethylthiometon), 1,3-bis- (Carbamoylthio) -2- (N, N-dimethylamino) -propane hydrochloric acid (common name, cartap) and the like.

The active compound combinations according to the invention can be used as such, in their preparation, or prepared by further dilution therefrom, eg ready-to-use solutions, emulsified concentrates. , Emulsions, suspensions, hydrating ingredients, water-soluble agents, tablets and granules.

The active compound combinations according to the invention are for example conventional powders for seed drying, solution for seed treatment, water treatment for seed treatment, hydrating dispersants for slurry treatment, and conventional watering, spraying, spraying, dispersion or coating. It can be used as a method.

The active compound combinations according to the invention, i.e., the combination of tifluzamide and dimuron, may be used in the form of a composition containing both active ingredients, or the active compounds may be used simultaneously or sequentially in different formulations, respectively. It may be.

When treating parts of the plant, the concentration of the active compound in the form of use can be varied within a significant range, but in general it can be 1-0.0001% by weight, preferably 0.5-0.001% by weight. In addition, when treating seeds, it is preferable to use the ratio of 0.001-50 g of active compound per kg of seeds.

When treating the mother plate, it is suitable to use the active compound at 0.00001-0.1% by weight, preferably 0.0001-0.02% by weight.

In addition, during the above treatment, it is generally appropriate to use the amount of each active compound as follows: the amount of tifluzamide is 1-7 g, preferably 2-4 g, and the amount of dimuron is 0.1. -10 g, preferably 0.2-7 g.

The following examples illustrate the good fungicidal action of the compositions according to the invention. In the examples the parts are parts by weight.

Biological test

Example 1

Root Treatment and Phytotoxicity Reduction Tests for the Paperback Disease (Ristonia Solania Queen: Rhizotonia solani Kuehn)

Preparation of Active Compounds

25 parts of water was added to the mixture of 10 parts of tifluzamide, 30 parts of bentonite (montmorillonite), 58 parts of talc, and 2 parts of lignin sulfonate, and it mixed thoroughly. The product was made into granules having a size of 10-40 mesh using an extrusion granulator. The granules were dried at a temperature between 40-50 ° C.

The granules were prepared in the same manner with respect to dimuron.

Examination process

Black clay plastic jars with a diameter of 12 cm were filled with paddy soil. The jars were placed in a greenhouse and watered with a volume of soil that was completely wet. Then, with a finger, I drilled a 3cm hole in the center of the soil surface of each jar. Five seedlings of 15 cm of rice (variety: Nipponbare) were transferred to each jar and the desired amount of the above-mentioned preparations was applied simultaneously to the roots of the plants. After covering the jar with soil, the water was filled to a depth of 3 cm and the water was kept at a depth of 3 cm for the duration of the test.

Phytotoxicity to rice was assessed 22 days after chemical treatment.

After 6 weeks of chemical treatment, Pellicularia sasakii was inoculated with barley medium. Ten days after the inoculation, the extent of infected rice sugar per jar was classified and evaluated. The protection was calculated in%.

A protection of 0% represents the same or higher infection as that of the untreated control group, while a protection of 100% indicates no infection at all. The degree of phytotoxicity to rice was assessed in%. The figures are as follows:

0% = no phytotoxicity

Less than 10% = phytotoxicity in acceptable range

100% = completely destroyed

The test results are shown in Table 1 below.

Chemical compound Dosage (Active ingredient mg / root) Phytotoxicity to Rice (%) Protective effect against paperback disease (%) Tifluzamid (1) + Dimuron (2) 2 + 1.52 + 12 + 0.5 005 100100100 Tifluzamid (1) 2 50 100 Dimuron (2) 1.510.5 000 000 Untreated control - 0 0

Example 2

Test of phytotoxicity reduction effect by nursery box treatment

Examination process:

The test composition was obtained by a method similar to the method mentioned in Example 1. The composition was uniformly used for seedlings (variety: Niigatawase) of rice grown on the mother bed according to the conventional method. The granules on the leaves were shaken off and then watered again. Then the rice was transferred to rice transplanters.

After transplanting, the rice was kept under normal conditions. Phytotoxicity to rice was evaluated.

Evaluation of phytotoxicity was carried out in the same manner as in Example 1.

The test results are shown in Table 2.

Chemical compound Dosage (Active ingredient mg / root) Phytotoxicity to Rice (%) 21 days after application 54 days after application Tifluzamid (1) + Dimuron (2) 2 + 1.52 + 12 + 0.5 005 000 Tifluzamid (1) 2 50 30 Dimuron (2) 1.510.5 000 000 Untreated control - 0 0

Formulation Example 1

25 parts of water was added to the mixture of 10 parts of tifluzamide, 7.5 parts of dimurons, 30 parts of bentonite (montmorillonite), 50 parts of talc, and 2.5 parts of lignin sulfonate, and mixed them thoroughly. The product was made into granules having a size of 10-40 mesh using an extrusion granulator. The granules were dried at a temperature between 40-50 ° C.

Formulation Example 2

25 parts of water was added to a mixture of 10 parts of tifluzamide, 2 parts of dimurone, 30 parts of bentonite (montmorillonite), 56 parts of talc and 2 parts of lignin sulfonate, and mixed them thoroughly. The product was made into granules having a size of 10-40 mesh using an extrusion granulator. The granules were dried at a temperature between 40-50 ° C.

Formulation Example 3

Ten parts of tfluzamide, 10 parts of dimuron, 30 parts of lignin sulfonate, 15 parts of bentonite and 35 parts of calcined diatomaceous earth powder were thoroughly mixed with water. The product was granulated by extruding through a 0.3 mm screen. After the product was dried, wet-able granules were obtained.

Formulation Example 4

25 parts of water was added to a mixture of 10 parts of tifluzamide, 5 parts of dimurone, 33 parts of bentonite (montmorillonite), 50 parts of talc and 2 parts of lignin sulfonate, and mixed them thoroughly. The product was made into granules having a size of 10-40 mesh using an extrusion granulator. The granules were dried at a temperature between 40-50 ° C.

Claims (7)

As an active ingredient, A) of Formula 1 Formula 1 (Tifluzamide) And B) 1- (1-methyl-1-phenylethyl) -3-p-tolylurea of Formula 2 (Dimuron) Fungicide composition, characterized in that it contains a combination of. The composition of claim 1, wherein the weight ratio of the active compound of formula 1 to the active compound of formula 2 is 1: 0.1-1: 3. A method of controlling fungi characterized by applying the active combinations according to claim 1 to fungi and / or their habitat. 4. A method according to claim 3, wherein the active formulation is applied to the mother bed. Use of the active combination according to claim 1 for controlling fungi. A process for the preparation of fungicide compositions, characterized in that the active formulation according to claim 1 is mixed with extenders and / or surfactants. A method of controlling fungi characterized by the continuous application of the active compounds of formula 1 and the active compounds of formula 2 to fungi and / or their habitat.