JP2005097169A - Lawn disease injury-controlling agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a chemical agent applicable to increased kinds of controllable lawn disease injuries with reduced amounts of application. <P>SOLUTION: The chemical agent such as a lawn disease injury-controlling agent for the application treatment of stems and leaves comprises at least one compound, i.e. benomyl and/or thiophanate methyl and tolclofos-methyl. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disease control agent for turf and the like.

Many techniques have been developed and utilized to cultivate and manage lawns such as parks or golf courses in a healthy state and to use them effectively. In particular, it is important to look beautiful in turf cultivation. When turf is afflicted with a disease and a symptom occurs, aesthetics are greatly impaired. Developed and used.
Among them, tolcrofos methyl has long been used for many turf diseases such as snow rot at golf courses. Benomyl, on the other hand, is registered for turf disease, but its usage is limited due to its narrow range of applicable diseases.
In addition, a technique is known that contains benomyl and tolcrofosmethyl to control herringbone disease, which is an important soil disease of fruit trees, by soil irrigation treatment (see, for example, Patent Document 1). However, only a method of use for the purpose of controlling white coat feather and purple coat feather disease by soil irrigation treatment is disclosed, and there is no description of normal foliage spraying treatment. In addition, there is no description about turf disease control.

Japanese Unexamined Patent Publication No. 9-75917

  When the occurrence of turf disease is observed, a plurality of diseases usually occur at the same time, and a control agent for controlling a plurality of diseases occurring at the same time is required. For example, the most widely used pencyclon currently has an excellent effect on brown patches in spring spraying, but it may not always have a sufficient effect on dollar spots and anthracnose that occur at the same time. is there. Propiconazole exhibits excellent efficacy for dollar spots, but may not always have sufficient effect for brown patches. As described above, many of the currently widely used drugs are not always sufficient in the types of turf diseases that can be controlled, and as a result, require a large amount of application.

Under such circumstances, as a result of intensive studies aimed at developing a drug capable of simultaneously controlling a plurality of turf diseases at a low dose, the present inventors have found that for the foliar application treatment of tolcrofos methyl and benomyl or thiophanate methyl. It was found that the number of lawn diseases that can be controlled by using the mixture is increased, and the application amount can be reduced, and the present invention has been achieved.
That is, the present invention
1. A lawn disease control agent for foliage spraying treatment, which contains at least one of benomyl or thiophanate methyl and tolcrofosmethyl (hereinafter sometimes referred to as the present invention control agent);
2. Lawn disease control agent for foliage spray treatment characterized by containing benomyl and tolcrofos methyl;
3. A lawn disease control method comprising treating an effective amount of the lawn disease control agent according to item 1 or 2 on the lawn with foliage treatment;
Etc. are provided.

  By using the control agent of the present invention for the foliage spraying treatment, while maintaining the excellent effects such as that of torquelofos methyl, it is possible to control the types of turf diseases that can be controlled by exhibiting the excellent effects of benomyl or thiophanate methyl. As the amount increases, the application rate can be reduced.

Hereinafter, the present invention will be described in detail.
The active ingredient contained in the control agent of the present invention is usually mixed with a solid carrier, and if necessary, a surfactant, other formulation adjuvants, etc. are added, and a wettable powder, granule, granular wettable powder, It is formulated into suspensions, powders, liquids, emulsions, microcapsules and the like. In these preparations, the total amount as an active ingredient is generally 0.1 to 99.9% by weight, preferably 0.2 to 80% by weight.

  Examples of solid carriers used in the preparation include clays (kaolinite, diatomaceous earth, synthetic silicon hydroxide, clay, bentonite, acidic clay), talc, and other inorganic minerals (sericite, quartz powder, activated carbon, And fine powders and granules of chemical fertilizers (such as ammonium sulfate, phosphorous acid, ammonium nitrate, ammonium chloride, urea).

Examples of the surfactant include known anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants.
Other formulation adjuvants include, for example, casein, gelatin, polysaccharides (starch, gum arabic, cellulose derivatives, alginic acid, etc.), lignin derivatives, synthetic water-soluble polymers (polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylic acid, etc.) Fixing agents and dispersants such as PAP (isopropyl acid phosphate), BHT (2,6-di-tert-butyl-4-methylphenol), BHA (2- / 3-tert-butyl-4-methoxyphenol), Stabilizers such as vegetable oil, mineral oil, fatty acid, fatty acid ester and the like can be mentioned.

  The formulated control agent of the present invention is applied to a plant body, water surface or soil as it is or diluted with water or the like. As an application place, lawns, such as a park, a golf course, a playground, a road, a home garden, are mentioned, for example. Furthermore, you may use together with another fungicide, an insecticide, a herbicide, a fertilizer, a soil improvement agent, etc. Such fungicides include, for example, iminotadine albecylate, iminoctadine acetate, hydrated sulfur, microbutanyl, tifluzamide, pyributylcarb, captan, organocopper, fosetyl, isoprothiolane, flutolanil, mepronil, trifumizole, thyllium, hydroxy Isoxazole, polycarbamate, metalaxyl, oxycarboxyl, trifolin, eclomezole, prosimidone, pencyclon, cyproconazole, chloroneb, cresoxime methyl, TPN, tebuconazole, iprodione, validamycin, propiconazole, ferrimzone, beteltanol, triazimephone, cimeconazole Propamocarb hydrochloride, azoxystrobin, polyoxin, tetraconazole, imibenconazole, fenarimol, Examples of insecticides include monocrotophos, acetamiprid, diazinon, permethrin, pyridafenthion, acephate, CVMP, tebufenozide, isoxathione, PHC, cyhalothrin, etofenprox, MEP, CYAP, teflubenzuron, silafluofen, VP , Imidacloprid, DEP, NAC, bifenthrin, prothiophos, thiamethoxam, CVP, clothianidin, fenobucarb, MIPC, mesomil, thiodicarb, bensultap and the like. Further, as such herbicides, for example, symmetrine, triadifram, imazosulfuron, prodiamine, biphenox, pendimethalin, pyributycarb, imazekin ammonium, propyzamide, DBN, napropamide, DCBN, halosulfuronmethyl, cyanazine, tenylchlor, Caffeanthrol, triadifram, SAP, CAT, methyl dimemron, isoxaben, chlorphthalim, butamifos, dithiopyr, ciduron, amiprophos methyl, indanophan, dithiopyr, bethrosin, isoxaben, alachlor, oxadiclomephone, orthobencurve, cyanazine, lenacyl, SAP, ashram , Pyrazosulfuron ethyl, MCPP, endotal disodium salt, ethoxysulfuron, metsulfuron methyl, triclopyr Furazosurufuron, cinosulfuron, imazosulfuron, cycloalkyl sulfates Fanmu Ron, imazaquin, 2,4PA, MDBA, rimsulfuron, MCP isopropylamine salt, florasulam, pyridate, and the like.

  The application amount of the control agent of the present invention is the mixing ratio of at least one compound of benomyl or thiophanate methyl, which is an active ingredient, to torquelofosmethyl, weather conditions, formulation form, application time, application method, application place, disease to be controlled, Although it depends on the target crop, etc., for example, the mixing ratio of at least one of benomyl or thiophanate methyl and torquelofos methyl is 0.5: 1 to 10: 1 by weight, preferably 1: 1 to 5: 1. The treatment amount of the active ingredient per 10 are usually 10 g to 10 kg, preferably 100 g to 1 kg. When a wettable powder, a wettable granule or the like is applied after being diluted with water, the applied concentration is 0.005 wt% to 1 wt%, preferably 0.01 wt% to 0.5 wt%. Of course, depending on the case, it can be applied as it is without being diluted with water or the like.

  Examples of turf diseases that are targeted include leaf blight (Curvularia geniculata, Helminthosporium-hagare-byo), dollar spot disease (Sclerotinia homoeocarpa), pseudoleaf rot (Ceratobasidium spp.), Leaf rot (Rhizoctonia solani), Examples thereof include snow rot microbe nuclear disease (Typhula incarnata, Typhula ishikariensis), anthracnose (Colletotrichum graminicola), and red snow rot (Monographella nivalis).

  The present invention will be described more specifically with reference to examples and test examples. However, the present invention is not limited to these examples. In the following description, “parts” means parts by weight.

Formulation Example 1
A wettable powder is obtained by thoroughly grinding and mixing 20 parts of benomyl; 50 parts of tolcrofos methyl; 25 parts of synthetic hydrous silicon oxide; 3 parts of calcium lignin sulfonate; and 2 parts of sodium lauryl sulfate.

Formulation Example 2
20 parts of benomyl; 20 parts of tolcrofosmethyl; 55 parts of synthetic hydrous silicon oxide; 3 parts of calcium lignin sulfonate; 2 parts of sodium lauryl sulfate are thoroughly pulverized and mixed to obtain a wettable powder.

Formulation Example 3
A wettable powder is obtained by thoroughly grinding and mixing 10 parts of benomyl; 50 parts of tolcrofosmethyl; 35 parts of synthetic hydrous silicon oxide; 3 parts of calcium lignin sulfonate; and 2 parts of sodium lauryl sulfate.

Test Example 1 (Pot test: Bent glass brown patch control effect test)
Bentgrass (pencloth) seeds were sown in a plastic pot and cultivated in a greenhouse for about 1 month. The grass height of the turf was trimmed to about 5 mm using scissors. Thereafter, the control agent of the present invention prepared in Formulation Example 1 was diluted with water to a predetermined concentration, and then the drug was sprayed so that the liquid amount was 500 ml / m ² . After the chemical solution adhering to the stalks and leaves of the turf was air-dried, dry crushed cells of Rhizoctonia solani cultured for 2 weeks in V8 bran medium were inoculated on the surface of the turf as they were. Thereafter, the disease was promoted by placing it for 7 days under excessive humidity. In order to examine the disease control effect of the chemical solution, the disease area ratio was visually examined, and the control value was determined based on the following formula.

Control value (%) = 100 × (P−W) / P
P: Untreated area disease area rate (%)
W: Disease area ratio (%)
E: Theoretical value of Colby = (X + Y) − (X × Y) / 100
X: Control value of agent A Y: Control value of agent B

As a result, surprisingly, the control agent of the present invention has an excellent effect of 37.6 points and 35.7 points with respect to the control effect expected by those skilled in the art as an additive effect (that is, the theoretical value of Colby) ( That is, a synergistic effect was shown.

Test Example 2 (Pot Test: Control Effect Test on Bentgrass Dollar Spot)
Bentgrass (pencloth) seeds were sown in a plastic pot and cultivated in a greenhouse for about 1 month. The grass height of the turf was trimmed to about 5 mm using scissors. Thereafter, the control agent of the present invention prepared in Formulation Example 1 was diluted with water to a predetermined concentration, and then the drug was sprayed so that the liquid amount was 500 ml / m ² . After the chemical solution adhering to the stalks and leaves of the turf was air-dried, the dried crushed cells of Sclerotinia homoeocarpa cultured for 2 weeks in V8 bran medium were inoculated on the surface of the turf as they were. Thereafter, the disease was promoted by placing it for 7 days under excessive humidity. In order to examine the disease control effect of the chemical solution, the disease area ratio was visually examined, and the control value was determined based on the formula described in Test Example 1.

As a result, surprisingly, the control agent of the present invention has an excellent effect of 22.4 points and 32.1 points with respect to the control effect expected by those skilled in the art as an additive effect (that is, the theoretical value of Colby) ( That is, a synergistic effect was shown.

  From the above results, since the control value was significantly higher than the theoretical value (E) of Colby, it was shown that the composition of the present invention has an excellent synergistic effect. Therefore, according to the present invention, it is possible to obtain a synergistic effect that is higher than the additive effect obtained by simply mixing, to increase the types of diseases that can be controlled, and to reduce the application amount.

  With the present control agent and the like, it is possible to increase the types of turf diseases that can be controlled, and to provide a drug that can reduce the amount applied.

Claims (3)

  A lawn disease control agent for foliage spraying treatment, comprising at least one of benomyl or thiophanate methyl and tolcrofos methyl.   A lawn disease control agent for foliage spraying treatment characterized by containing benomyl and tolcrofosmethyl. A lawn disease control method comprising treating an effective amount of the lawn disease control agent according to claim 1 or 2 on the lawn.