JPS597105A - Agricultural and horticultural germicide - Google Patents

Abstract

PURPOSE:A safe agricultural and horticultural germicide, containing a 1,2,4-triazole derivative and N-(3,5-dichlorophenyl)-1,2-dimethylcyclopropane-1,2-dicarboximide, and having a powerful activity and general-purpose properties. CONSTITUTION:An agricultural and horticultural germicide containing a 1,2,4- triazole derivative of formula (X is <=2 halogens or halogenated alkyl; Y is <=2 halogens), e.g. the compound of formula II, and N-(3,5-dichlorophenyl)-1,2- dimethylcyclopropane-1,2-dicarboximide preferably at 1:(0.1-10) weight ratio. EFFECT: The potentiating or synergistic enhancing action on the controlling effects of blights permits the application in a small amount of the chemical.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the general formula (I) (wherein X represents up to two identical or different halogen atoms or halogenated lower alkyl groups, and Y represents up to two halogen atoms. ) 1, 2.4'
-) An agricultural product containing 1s of a lyazole derivative and N-(3,5-dichlorophenyl)-1,2-dimethylsifuo7'opan-1,2-dicarboximide (hereinafter referred to as compound A) as an active ingredient. Regarding horticultural fungicides.

In recent years, hardened facilities have become popular throughout the country, and various vegetables, flower petals, fruit trees, and other crops are now actively cultivated year-round in glass greenhouses and plastic greenhouses.

These facility environments provide temperature and humidity conditions suitable for the infection and proliferation of harmful pathogens, and as a result, various diseases frequently occur. Various fungicides are currently being developed and used for the purpose of controlling these harmful diseases.

However, the effectiveness of any of these drugs is weaker than that of conventional mercury drugs, and the current situation is that they cannot fully control these frequently occurring diseases. In addition, these drugs are often applicable to a narrow range of diseases, making it extremely inconvenient to use them in facilities where various diseases coexist. Under these circumstances, farmers try to control diseases by repeatedly spraying various chemicals at high doses many times. However, the use of such large amounts of chemicals in glass greenhouses or plastic greenhouses causes problems such as residues on crops and chemical damage, as they are less susceptible to washing away by rain and photodegradation compared to outdoors. Therefore, there is an urgent need for the early development of a drug that exhibits strong pesticidal activity, has a wide spectrum of pesticidal activity that can simultaneously control various diseases that occur, is effective when sprayed in small doses, and has no concerns about residual toxicity or drug damage. Highly desired.

From this viewpoint, the present inventors conducted various tests in order to develop a strong, versatile, and highly safe agricultural and horticultural fungicide. As a result, by blending Compound A with one or more of the triazole conductors represented by the general formula (I), it was found that almost all of the major crop diseases (#1) could be completely controlled. We have now created a novel and useful agricultural and horticultural fungicide that can be used in significantly lower amounts than when each agent is used alone.

The 1,2,4-) lyazole derivative represented by general formula (I), which is one of the active ingredients of the present invention, is specially
These derivatives are compounds described in the specification of No. 163409.These derivatives show excellent activity against udon zeta disease and rust disease on various vegetables, flower petals, and fruit trees when sprayed at low doses, and have no phytotoxicity, but are not harmful to other plants. In order to control diseases, even high-dose spraying is not effective enough. On the other hand, Compound A is a compound described in Japanese Patent Publication No. 47-43813 which shows excellent control effects on botrytis, sclerotium, and Mars' disease on various vegetables, flower petals, and fruit trees. However, the spectrum of control activity of this compound is limited to a small number of diseases, including the above-mentioned diseases, and in order to control these diseases, it is necessary to spray at high doses, so repeated spraying may cause chemical damage. There are drawbacks.

The present inventors have proposed that they can prevent various diseases by combining and spraying two types of compounds having these drawbacks, namely, the 1,2,4-triazole derivative represented by the general formula (I) and the compound A. It was discovered that this compound has a synergistic or synergistic effect of enhancing the disease control effect. In other words, when sprayed in low doses, they exert remarkable control activity against diseases for which TL control activity is not observed when used alone, when used in combination. This fact is based on the conventional mixed symmetry
It is a completely unexpected power and new knowledge that breaks the preconceptions of the world.

The agricultural and horticultural fungicide of the present invention has the excellent action described above, so it can provide sufficient control even if the amount of the fungicide used is reduced to one-fourth to one-tenth of the amount when each agent is used alone. Effects can be obtained. In addition, the agricultural and horticultural fungicides of the present invention can be expected to be effective against powdery mildew of cucurbits, anthracnose, vine blight, gray mold, sclerotinia, and tomato/eggplant leaf vigor. - Mildew, ring spot, gray mold, gray onion rot,
Mildew, gray mold of lettuce, sclerotia, sclerotium of kidney beans, anthracnose, powdery mildew of strawberries, rust of broad beans,
Ring-shaped disease 1. Powdery mildew, mildew, scab of petals, powdery mildew of apple, powdery mildew, powdery mildew, scab, leaf spot, powdery mildew of pear, scab, black spot, mars of peach, powdery mildew of grapes , rust, gray mold, black mold, sclerotinia of soybeans, adzuki bean, powdery mildew of wheat, rust, snow rot, and sesame leaf blight of rice.

Next, representative compounds of the 1,2,4-)1 noazole derivatives that can be used in the present invention are exemplified by the following 9, but the present invention is not limited to these compounds. In addition, compound Yin is also referred to in the following examples and test PI.

When carrying out the present invention, the active ingredient compound is diluted with a carrier and used in a commonly used form, for example, an aquarium, an emulsion, or
It may be used in the form of powders, DL-type powders, flowables, granules, fine granules, tablets, etc. according to known methods. The carriers used in the present invention include solid carriers such as clay, talc, betonite, kaolin, soybean earth, and silica, or benzene, xylene, toluene, kerosene, and alcohols (methanol, ethanol, isopropanol,
-butanol, etc.), ketones (acetone, methyl ethyl ketone, cyclohexanone, etc.) can be used. These can be used by blending appropriate amounts of suitable surfactants, adhesives, etc. into formulations. The appropriate blending ratio of the active ingredients in the present invention is 0.1 to 10 parts by weight of Compound A to 1 part of each type of triazole derivative, but depending on the conditions during application and the occurrence of disease. The blending ratio can be changed as appropriate depending on the situation. In addition, #1 of the active ingredients of the present invention
Crab may also be used in combination with other fungicides, insecticides, herbicides, etc.

Next, examples will be shown regarding the fungicide for gardening of the present invention.
The present invention is not limited only to the following examples.

Example 1 Wettable powders 10 parts of Compound 1, 20 parts of Compound A, 5 parts of polyoxyethylene alkylaryl ether, 3 parts of calcium lignin sulfonate, and 62 parts of diatomaceous earth are uniformly mixed and ground to obtain a wettable powder. .

Example 2 1 part of powder compound 3, 2 parts of compound A, 0.5 part of silicic anhydride fine powder, 0.5 part of calcium stearate, clay 5
0 parts and 46 parts of talc are uniformly mixed to obtain a powder.

Example 3 10 parts of Emulsion Compound 4, 20 parts of Compound A, 750 parts of methyl ethyl keto and 20 parts of polyoxyethylene nonylphenyl ether were mixed and dissolved to give 30% active ingredient.
An emulsion containing . When using this product, dilute it 500 to 10,000 times with water and spray it on plants.

Next, the pesticidal effect when the compound of the present invention is used as a fungicide for agriculture@strawberries will be explained using test examples.

Test Example 1 Control effect on K. blight I sprayed it with a tin gun aimed at 201d. Myc vine blight fungus (Myc fox 7 Aerella melonis: Myc
The seeds were inoculated onto the sprayed leaves using a piece of edible fungi agar obtained by punching out the tip of a bacterial colony of Ospho@rslla melonis with a cork polarizer with a diameter of 8 holes as an electrode source. 24 days after vaccination
The seeds were stored in a greenhouse at ℃ for 3 days to promote disease onset. The diameter of the lesions was measured using a vernier caliper, and the control value (chi) was determined from comparison with the untreated area. In addition, drug damage was investigated using the following indicators.

Drug damage investigation index 5: @ Significant 4: Significant 3: Much 2: Little 1: Slight 0: None Table 1 Thiophanate methyl is 4.4'-O-phenyl dimethyl show. Furthermore, the value in parentheses in the non-sprayed area indicates the average lesion diameter in the non-sprayed area.

Test Example 2 Control effect on pear blight (#1 field control test) Using 15-year-old trees from the 20th century, 1 plot, 1 tree, 3 i! Tested under the system. Gymno-8pora (Gymnosborangium halaeanum) is used to cause multiple diseases.
T'! It was transplanted into the field and used as a source of infection.

The drug was sprayed from April 16th using a simple sprayer with a diluted solution of a predetermined concentration of hydrating powder at a rate of 3,001 liters per liter.
It was sprayed 3 times with an interval of O days. To investigate the onset of disease, 20 days after the final spraying, we arbitrarily investigated the number of lesions per leaf on 300 leaves per tree.
The control value (@) was calculated using the following formula. In addition, phytotoxicity on leaves and fruits was investigated using the following indicators.

Drug damage investigation index 5: Severe 4: Severe 3: Much 2: Little 1: Slight 0: None Table 2 Bisdaicene is bis(dimethyldithiocarbamic acid)
Indicates ethylene bis(dithiocarbamic acid) dizinc.

Furthermore, the numbers in parentheses in the non-sprayed plot indicate the number of lesions per leaf in the non-sprayed plot.

Test Example 3 Control effect on rice sesame leaf blight (Bo Soto) A chemical solution diluted to a predetermined concentration was applied to the fourth true-leaf seedlings of rice (variety: Asahi) cultivated in clay pots with a diameter of 9 cm in a greenhouse. was scattered. One day after spraying, rice sesame leaf blight fungus (Cochlj-obolua) was detected.
mlyabeanus) by spraying a conidial suspension of
After being stored in a greenhouse at 24°C overnight, it was transferred to an infection greenhouse.

Five days after inoculation, the number of lesions per leaf on the fourth leaf was investigated, and the control value (%) was calculated using the following formula. In addition, chemical damage to rice was investigated using the same method as Test Example 1.

The test results are shown in Table 3.

Table 3 Dimandycene is a zinc-maneb complex compound. Furthermore, the numbers in parentheses in the non-sprayed plots indicate the average number of lesions per leaf in the non-sprayed plots.

Procedural amendment September 9, 1981 Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of the case 1982 Patent Application No. 11LF”795 2
, Title of the Invention 6, Relationship with the person making the amendment 1) In Table 6 on page 15, the dispersion rate of 1 compound 1 + compound A'' is 1''25+25.1-2512.
5+12.5 J 12.5+12.5
and correct it.

+6.3J 2) In the same table on the same page, the spray concentration of 1-Compound 2.
．． 512.5+12.5 J 12.5
-1- Corrected to 6.64.

Claims (1)

[Claims] represents an atom or a halogenated lower alkyl group, and Y is 2
Indicates up to halogen atoms. ) 1, 2.4
- Triazole derivative and N-(3,5-dichlorophenyl)-1,2-dimethylcyclopropane-1,2-
An agricultural and horticultural fungicide characterized by containing dicarboximide as an active ingredient.