Fungicidal composition

Abstract

A fungicidal composition which comprises an inert carrier and as an active ingredient (E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol and a benzimidazole-thiophanate type fungicide in the ratio of 1 to 0.1 to 10 by part by weight in a total amount of 0.1 to 99.9% by weight.

Description

The present invention relates to a fungicidal composition which comprises, as an active ingredient, (E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol (hereinafter referred to as Compound A) and methyl-1-(butylcarbamoyl)benzimidazol-2-yl carbamate (hereinafter referred to as Benomyl), 2-(4-thiazolyl)-benzimidazole (hereinafter referred to as Thiabendazole), methylbenzimidazol-2-yl carbamate (hereinafter referred to as Carbendazim), 2-(2-furyl)benzimidazole (hereinafter referred to as Fuberidazole), 1,2-bis(3-methoxycarbonyl-2-thioureido)benzene (hereinafter referred to as methyl thiophanate) or 1,2-bis(3-ethoxycarbonyl-2-thioureido)benzene (hereinafter referred to as thiophanate) which is benzimidazolethiophanate type fungicide, and an inert carrier.

As described in The Pesticide Manual, 6th Edition, the benzimidazole-thiophanate type fungicides are excellent chemicals as having both preventive effect and curative effect on a wide range of plant diseases of the fruit trees, vegetables and the like and having rapid effectiveness, remaining effectiveness as well as infiltration ability.

However, recently drug-resistant organisms appeared in the important plant diseases such as Powdery mildew, Gray mold and the like, presenting serious problems. (Longman: Systemic fungicides edited by R. W. March, 1972).

As mentioned in the UK Patent Application GB 2046260A, the Compound A is an excellent chemical having sufficient controlling effect on Powdery mildew, Rust and the like of cereals, fruit trees, vegetables and the like. In addition, the Compound A has excellent properties as exemplified by having a controlling effect on the resistant strain to benzimidazole-thiophanate type fungicides.

The present inventors have studied extensively on the fungicides which are able to control many plant diseases in an amount as small as possible and moreover at the same time. As the result, it was found that the composition of this invention is able to not only maintain the controlling effect of the ingredient compound, but also control many plant diseases both preventively and curatively in a small amount and at the same time.

The composition of this invention contains the Compound A and benzimidazole-thiophanate type fungicides as an active ingredient. The weight ratio of the two components is 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight of benzimidazole-thiophanate type fungicide per 1 part by weight of the Compound A.

The pathogens on which the composition of this invention has controlling effect preventively or curatively are Pyricularia oryzae, Cochliobolus miyabeanus, Rhizoctonia solani of rice plant; Erysphe graminis f. sp. hordei, f. sp. tritici, Gibberella zeae, Puccinia striiformis, P. graminis, P. recondita, P. hordei, Typhula sp., Micronectriella nivalis, Ustilago tritici, U. nuda, Pseudocercosporella herpotrichoides, Rhynchosporium secalis, Septoria tritici, Leptosphaeria nodorum of barley; Diaporthe citri, Elsinoe fawcetti, Penicillium digitatum, P. italicum of citrus fruits; Sclerotinia mali, Valsa mali, Podosphaera leucotricha, Alternaria mali, Venturia inaequalis of an apple; Venturia nashicola, Alternaria kikuchiana, Gymnosporagium haraeanum of a pear; Sclerotinia cinerea, Cladosporium carpophilum, Phomopsis sp. of a peach; Elsinoe ampelina, Glomerella cingulata, Uncinula necator, Phakopsora ampelopsidis of a grape; Gloeosporium kaki, Cercospora kaki, Mycosphaerella nawae of a persimmon; Colletotrichum lagenarium, Sphaerotheca fuliginea, Mycosphaerella melonis of a melon; Alternaria solani, Cladosporium fulvum of a tomato; Phomopsis vexans, Erysiphe cichoracearum of an eggplant; Alternaria japonica, Cercosporella brassicae of Cruciferae vegetables; Puccinia allii of a spring onion; Cercospora kikuchii, Elsinoe glycines, Diaporthe phaseolorum var. sojae of a soy bean; colletotrichum lindemuthianum of a kidney bean; Mycosphaerella personatum, Cercospora arachidicola of a peanut; Erysiphe pisi of a pea; Alternaria solani of a potato; Sphaerotheca humuli of a strawberry; Exobasidium reticulatum, Elsinoe leucospila of a tea; Alternaria longipes, Erysiphe cichoracearum, Colletotrichum tabacum of a tobacco plant; Cercospora beticola of a sugar beet; Diplocarpon rosae, Sphaerotheca pannosa of a rose; Septoria chrysanthemi-indici, Puccinia horiana of a chrysanthemum; Botrytis cinerea, Sclerotinia sclerotiorum of a variety of crops and the like.

Consequently, the composition of this invention can be applied as a fungicide onto the paddy field, field, orchard, tea field, meadow, lawn field and the like.

In the actual use of the composition of this invention, only the ingredient compound may be applied without addition of any other components, but usually it is admixed with solid carriers, liquid carriers, surface active agents, and other formulating auxiliaries and formulated in the form of wettable powder, flowable, granular, dust and the like.

These compositions contain the active ingredients in an amount of 0.1 to 99.9%, preferably 1 to 99% by weight.

Examples of solid carriers include fine powder or granular of kaolin clay, attapulgite, bentonite, Japanese acid clay, pyrofilite talc, diatomaceous earth, calcite, corn stalk powder, walnut shell powder, urea, ammonium sulfate, synthesized silicone oxide hydrate, and the like. Examples of the liquid carriers include aromatic hydrocarbons, such as xylene, methylnaphthalene and the like; alcohols such as isopropanol, ethylene glycol, cellosolve and the like; ketones such as acetone, cyclohexanone, isophorone and the like; plant oil such as soy bean oil, cotton seed oil and the like; dimethylsulfoxide, acetonitrile, water and the like.

Examples of the surface active agents employed for emulsification, dispersion, wetting-spread and the like include anionic surface active agents such as alkyl sulfate ester salt, alkyl (aryl) sulfonate salt, dialkylsulfosuccinate salt, polyoxyethylene alkyl aryl ether phosphate salt, naphthalene sulfonic acid-formalin condensate and the like; non-ionic surface active agents such as polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene block copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester and the like. Examples of the formulating auxiliaries include lignine sulfonate salt, arginate salt, polyvinyl alcohol, gum arabic, CMC (carboxymethylcellulose), PAP (isopropyl acid phosphate) and the like.

Formulation Examples will be shown hereinbelow. Parts are shown by parts by weight.

FORMULATION EXAMPLE 1

10 Parts of the Compound A, 20 parts of carbendazim, 3 parts of calcium lignin sulfonate, 2 parts of sodium lauryl sulfate and 65 parts of synthesized silicone oxide hydrate were pulverized well and admixed with one another to obtain a wettable powder.

FORMULATION EXAMPLE 2

1 Part of the Compound A, 2 parts of venomyl, 1 part of synthesized silicone oxide hydrate, 2 parts of calcium lignin sulfonate, 30 parts of bentonite, and 64 parts of kaolin clay were pulverized well and admixed with one another and kneaded with addition of water and then subjected to granulation and drying to yield granulars.

FORMULATION EXAMPLE 3

10 Parts of the Compound A, 15 parts of methyl thiophanate, 3 parts of polyoxyethylenesorbiton mono-oleate, 3 parts of CMC, and 69 parts of water were blended and pulverized by the wet method to the particle size of the active ingredient of 5 microns or less to yield a flowable.

FORMULATION EXAMPLE 4

0.5 Part of the Compound A, 1.5 parts of thiabendazole, 88 parts of kaolin clay and 10 parts of talc were pulverized and blended well to yield a dust.

These compositions are applied as such or after dilution with water onto the leaves and onto the soils to admix therewith. Increase in the controlling effect can be expected by the combination with other fungicides. Furthermore, these compositions may be used in combination with insecticides, acaricides, nematocides, herbicides, plant growth regulators, fertilizers, soil improving agents and the like.

In the practical use of the present composition, the amount of the active ingredient applied is usually 1 to 500 g, preferably 10 to 100 g per one are. In the dilution of the wettable powder, flowable and the like with water, the concentration of the active ingredients applied is 0.001 to 0.5%, preferably 0.01 to 0.1% and the above compositions can be applied as such without being added with granular and dust.

Control effect of the present composition on the plant disease is shown by the Test Examples. The tested compounds are the above said Compound A, Benomyl, Thiabendazol, Carbendazim, Fuberydazole, Methyl thiophanate, and Thiophanate. The fungicides used as a comparison reference are shown by the compound marks of the following table.

TABLE______________________________________Compound Chemical Commonmark structure name______________________________________ ##STR1## DichlorofluanidC ##STR2## Chlorothalonil______________________________________

The control effect was evaluated by the numerical 6 steps and expressed by 0 to 5, depending on the disease conditions of the test plant, that is, colony and lesion of the leaves and stems.

5:No colony and lesion is observed completely. 4:About 10% of the colony and lesion is observed. 3:About 30% of the colony and lesion is observed. 2:About 50% of the colony and lesion is observed. 1:About 70% of the colony and lesion is observed. 0:There is no difference in disease condition rom the non-treatment.

TEST EXAMPLE 1

Control effect test on Gray mold of cucumber (Preventive effect)

Sandy soil was packed in a plastic pot and cucumber (SAGAMI HANGJIRO) was sowed and the resulting seedling was grown in a greenhouse for 8 days. The wettable powder of the test compound formulated according to Formulation Example 1 was diluted with water to a predetermined concentration and sprayed onto the seedling of the cucumber which had developed cotyledons. After sprayed, an agar piece containing organisms causing Gray mold of cucumber was attached to the seedling of cucumber for inoculation. After inoculation, the seedling of cucumber was placed at 20.degree. C. for 3 days in high humidity and the control effect was examined. The results were shown in Table 1.

TABLE 1______________________________________ Concentration of active ingredi- ControlTest compound ent applied (ppm) effect______________________________________A 10 0A 3 0Benomyl 10 3Benomyl 7 3Thiabendazole 10 2Thiabendazole 7 2Carbendazim 10 3Carbendazim 7 3Fuberidazole 10 2Fuberidazole 7 2Methyl thiophanate 10 3Methyl thiophanate 7 2Thiophanate 10 3Thiophanate 7 2A + Benomyl 3 + 7 5A + Thiabendazole 3 + 7 5A + Carbendazim 3 + 7 5A + Fuberidazole 3 + 7 5A + Methyl thiophanate 3 + 7 5A + Thiophanate 3 + 7 5B 100 2______________________________________

TEST EXAMPLE 2

Control effect on Powdery mildew of cucumber (Preventive effect)

Sandy soil was packed in a plastic pot and cucumber (SAGAMI HANJIRO) was sowed and grown in a greenhouse for 20 days. The wettable powder of the test compound formulated according to Formulation Example 1 was diluted with water to a predetermined concentration and sprayed onto the leaves of a seedling of the cucumber which had developed a second leaf.

After sprayed, a spore-suspension of organisms causing Powdery mildew of cucumber was sprayed over the seedling of cucumber for inoculation. After inoculation, the seedling was grown at 20.degree. C. for 10 days and then the control effect was examined. The results were shown in Table 2.

TABLE 2______________________________________ Concentration of active ingredient ControlTest compound applied (ppm) effect______________________________________A 3 3A 1 2Benomyl 3 1Benomyl 2 0Thiabendazol 3 0Thiabendazol 2 0Carbendazim 3 1Carbendazim 2 1Fuberidazole 3 1Fuberidazole 2 0Methyl thiophanate 3 1Methyl thiophanate 2 0Thiophanate 3 1Thiophanate 2 0A + Benomyl 1 + 2 5A + Thiabendazole 1 + 2 5A + Carbendazim 1 + 2 5A + Fuberidazole 1 + 2 5A + Methyl thiophanate 1 + 2 5A + Thiophanate 1 + 2 5B 100 3______________________________________

TEST EXAMPLE 3

Control effect on Blast of rice plant (Preventive effect)

Sandy soil was packed in a plastic pot and rice plant (KINKI No. 33) was sowed therein and grown in a greenhouse. A wettable powder of the test compounds formulated according to Formulation Example 1 was diluted with water to a predetermined concentration and sprayed onto the seedling of rice plant which had developed a third leaf.

After sprayed, a spore suspension of organisms causing rice blast was sprayed onto the seedling of the rice plant for inoculation. After inoculation, the rice plant was placed at 25.degree. C. in a high humidity for 4 days and then the control effect was examined. The results were shown in Table 3.

TABLE 3______________________________________ Concentration of active ingredient ControlTest compound applied (ppm) effect______________________________________A 75 3A 25 1Benomyl 75 3Benomyl 50 2Thiabendazole 75 2Thiabendazole 50 1Carbendazim 75 3Carbendazim 50 2Fuberidazole 75 3Fuberidazole 50 2Methyl thiophanate 75 3Methyl thiophanate 50 2Thiophanate 75 2Thiophanate 50 2A + Benomyl 25 + 50 5A + Thiabendazole 25 + 50 5A + Carbendazim 25 + 50 5A + Fuberidazole 25 + 50 5A + Methyl thiophanate 25 + 50 5A + Thiophanate 25 + 50 5______________________________________

TEST EXAMPLE 4

Control effect on infection of Chinese cabbage (Cercospollera brassicae) (Curative effect)

Sandy soil was packed in a plastic pot and Chinese cabbage (Nagaoka No. 2) was sowed therein and grown in a greenhouse for 30 days. A spore suspension of Cercospollera brassicae of Chinese cabbage was sprayed to the seedling of the Chinese cabbage for inoculation which had developed second leaf. After inoculation, the seedling was placed at 20.degree. C. in a high humidity for a day.

A wettable powder of the test compounds formulated according to Formulation Example 1 was diluted with water to a predetermined concentration and was sprayed onto the seedling so as to adhere to the leaves sufficiently. After sprayed, the seedling was grown in a greenhouse for 14 days and then the control effect was examined. The results were shown in Table 4.

TABLE 4______________________________________ Concentration of active ingredient ControlTest compound applied (ppm) effect______________________________________A 10 3A 3 1Benomyl 10 2Benomyl 7 2Thiabendazole 10 2Thiabendazole 7 1Carbendazim 10 2Carbendazim 7 2Fuberidazole 10 2Fuberidazole 7 1Methyl thiophanate 10 2Methyl thiophanate 7 1Thiophanate 10 1Thiophanate 7 1A + Benomyl 3 + 7 5A + Thiabendazole 3 + 7 5A + Carbendazim 3 + 7 5A + Fuberidazole 3 + 7 5A + Methyl thiophanate 3 + 7 5A + Thiophanate 3 + 7 5C 100 0______________________________________

Claims

1. A fungicidal composition which comprises an inert carrier and as an active ingredient (E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol and methylbenzimidazol-2-yl carbamate in the ratio of 1 to 0.5-5 parts by weight in a total amount of 1 to 99% by weight.

2. A method for controlling fungi which comprises applying a fungicidally effective amount of the fungicidal composition according to claim 1, to said fungi.