JP2014015395A - Sigatoka disease control agent, and control method of the sigatoka disease - Google Patents

Abstract

An object of the present invention is to provide a Sigatoka disease control agent and its control method for controlling Sigatoka disease that occurs in plants belonging to the family Salamander, especially bananas.
A control agent comprising isoprothiolane (diisopropyl 1,3-dithiolane-2-ylidene malonate) as an active ingredient, and a sigatoka disease occurs in order to control a sigatoka disease occurring in a cereal family plant, particularly a banana. A sigatoka disease control agent and control method for spraying or applying to the leaf part or the pseudostem part of a banana parent pseudostalk strain that is or is predicted to occur.
[Selection figure] None

Description

  TECHNICAL FIELD The present invention relates to a Sigatoka disease control agent containing isoprothiolane as an active ingredient for controlling Sigatoka disease that occurs in a Musaceae plant, particularly a banana, and a method for its control.

  Plants belonging to the genus Bacolaceae, in particular bananas, are a collective term for varieties of edible fruits and refer to the fruits. The plants include East Asia such as China and Taiwan, Southeast Asia such as Philippines, Indonesia, Thailand and Vietnam, West Asia such as India, Brazil, Ecuador, Costa Rica, Mexico, Guatemala, Colombia, Peru and other Central and South America, Tanzania, Congo, Uganda It is mainly cultivated in Africa such as South Africa, plantation cultivation is also carried out, and it is cultivated throughout the year. Bananas grown and harvested in these countries are exported worldwide.

  In banana cultivation, the root part including the stem part is in the basement, and the stem-like part (leaf sheath part) that extends high above the ground part is called a pseudostem, and the leaf sheath actually overlaps several times. A long oval leaf (leaf blade) extends greatly from the tip of the pseudostem, and a fruit axis comes out from the tip of the pseudostem. Grows. After harvesting the banana, this pseudostem part (parent strain) is cut at about 1-2 m above the ground. At that time, a new pseudostem part (child strain) newly appearing from the underground root part is propagated in the same manner, or a new pseudostem part (child strain) is bred and propagated, and banana harvesting is repeated. The number of leaves (functional leaves) is important for banana cultivation, and since there are 3 months from the last leaf extraction (before flowering) to harvest, at least 12-13 functional leaves during the flowering period It is necessary to leave a degree. If the number of functional leaves is insufficient, the plant is cut down during cultivation.

The main disease of banana cultivation is Sigatoka disease, and there are yellow yellow Sigatoka disease and black black Sigatoka disease (Black Sigatoka disease).
Yellow Sigatoka disease is caused by Mycosphaerell
black sigatoka disease is a disease caused by Mycosphaerella fijiensis, especially black sigatoka disease occurs at high temperature and high humidity, causing banana leaves to turn black and inhibit photosynthesis It is a disease that halves the yield. The incubation period of Sigatoka disease ranges from 3 weeks to 2 months, and the initial symptoms of the affected banana are small spots appearing on the back of old leaves 4-5 below the top leaf, and eventually yellow along the veins. The lesions gradually expand and become dark brown. When the damage is severe, most leaves die and hang down, leaving only one or two of the central leaves. These controls begin by monitoring the banana leaf and are determined by the location of the youngest infected leaf and the degree of infection.

  When the occurrence of Sigatoka disease is confirmed, organosulfur fungicides such as mancozeb, organochlorine fungicides such as chlorthalonil, pyrimidine fungicides such as pyrimethanil, tridemorph, denpropimorph ) Morpholine fungicides such as diphenoconazole, diterconol, bittertanol, propiconazole, and epoxiconazole, and pyrazole trostrobin Strobilurin fungicides such as (azoxystrobin) are often used Several types at these fungicides from 10 days 20 days interval is sprayed.

  Isoprothiolane, which is an active ingredient compound of the Sigatoka disease control agent of the present invention, is a compound represented by diisopropyl 1,3-dithiolan-2-ylidenemalonate, and rice blast disease It is sold under the trade name “Fuji One” as a control agent, and is a known compound (for example, see Non-Patent Document 1). However, Non-Patent Document 1 does not describe or suggest that isoprothiolane is useful as a control agent for Sigatoka disease occurring in cereals, particularly bananas, and can be used as the control agent.

The Pesticide Manual 14 Edition (British Crop Production Council)

  As mentioned above, control of Sigatoka disease is the most important issue for banana cultivation, but the conventional technology treats the drug many times, so the labor is tremendous, and the emergence of drug-resistant bacteria is more effective in controlling Sigatoka disease. Making it difficult. Therefore, there is a need for a new labor-saving drug and control method that has advantages such as less burden on the environment for efficiently controlling difficult-to-control Sigatoka disease and enabling reduction of the amount of sprayed drug. Yes.

As a result of intensive studies to solve the above-mentioned problems, the present inventor has applied a drug containing isoprothiolane as an active ingredient to banana leaf blades, pseudostems, etc. in order to control banana sigatoka disease Alternatively, the present invention has found that banana shigatoka disease can be effectively controlled over a longer period by applying treatment, irrigation treatment to surrounding soil where bananas are grown, or injection treatment with a syringe or the like to a pseudostem. The Sigatoka disease control agent and its control method were completed.
Furthermore, in the treatment method of injecting the chemical solution of the Sigatoka disease control agent of the present invention with a syringe or the like to the pseudostem part (parent pseudostem part), in addition to efficiently controlling Sigatoka disease occurring on bananas, It can control even Sigatoka disease that occurs in the new pseudostem part (child pseudostem part) that comes out from the underground tuber part, has a remarkable long-term control effect as a Sigatoga disease control agent, and also has a burden on the environment and drug sprayers The present invention has been completed by finding out that it can be reduced.

That is, the present invention relates to at least the following inventions.
(1) An agent for controlling Sigatoka disease for the genus Musaceae, comprising isoprothiolane as an active ingredient.
(2) The Sigatoka disease control agent according to (1), wherein the plantaceae plant is a banana.
(3) The Sigatoka disease control agent according to (1) or (2), wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.
(4) The Sigatoka disease control agent according to any one of (1) or (2), wherein the Sigatoka disease is a Sigatoka disease caused by Mycospharella fijiensis.
(5) A method for controlling sigatoka disease of a cedar plant, which comprises treating an effective amount of a drug containing isoprothiolane as an active ingredient in a plant body of a scallop plant in which sigatoka disease is occurring or predicted to occur .

(6) The method for controlling Sigatoka disease according to (5), wherein the plantaceae plant is a banana.
(7) Treatment method is spraying or coating treatment of banana leaves or pseudostem, irrigation treatment to surrounding soil where banana grows, or chemical injection treatment of banana pseudostalk (5) Or (6) The method for controlling Sigatoka disease according to any one of the above.
(8) The method for controlling a Sigatoka disease according to any one of (5) and (6), wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.
(9) The method for controlling Sigatoka disease according to (5) or (6), wherein the Sigatoka disease is a Sigatoka disease caused by Mycospharella fijiensis.

(10) An effective amount of a Sigatoka disease control agent is sprayed or applied to the leaf part or pseudostem part of a banana parent strain in which Sigatoka disease has occurred or is predicted to occur in order to control Sigatoka disease occurring in banana seedlings. A method for controlling sikatoka disease of a banana seedling, characterized by performing an application treatment, an irrigation treatment to surrounding soil where bananas are grown, or a chemical injection treatment to a pseudostem.
(11) The method for controlling a Sigatoka disease according to (10), wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.
(12) The method for controlling Sigatoka disease according to (10), wherein the Sigatoka disease is Sigatoka disease caused by Mycospharella fijiensis.

  The Sigatoka disease control agent and the control method thereof according to the present invention are effective for controlling a Sigatoka disease containing isoprothiolane as an active ingredient in order to control Sigatoka disease that occurs or is predicted to occur in cereals, particularly bananas. The amount of bananas can be dispersed by spraying or applying to the leaf blades, pseudostems, etc. of plants, irrigating the surrounding soil where bananas grow, or by injecting with a syringe, etc. It shows a remarkable control effect over a long period against Sigatoka disease. Furthermore, the treatment of the parent pseudostem part also has the effect of preventing the onset of Sigatoka disease on the new pseudostem part (child strain) newly emerging from the underground tuber part. In addition, the Sigatoka disease control agent and control method of the present invention is a technique that can reduce the number of times of spraying the drug because the control effect continues for a long period of time, and can reduce the environmental burden.

In general, control agents containing isoprothiolane usable as an active ingredient in the present invention are commercially available in various dosage forms under the trade name of Fujione. Buy it. For example, when spraying or coating, emulsions, suspensions, oils, wettable powders and the like are preferable. In the case of soil irrigation, emulsions, suspensions, granules, wettable powders and the like are preferable. In the case of injection into the leaf sheath, emulsions, suspensions and wettable powders are preferable dosage forms.
In banana cultivation, 1,500 to 2,000 bananas are cultivated per hectare, but in the case of spraying and coating treatment, the amount of treatment agent is irrigated with soil from the range of 500 g to 2000 g per hectare as the active ingredient amount. In this case, the amount of active ingredient in the surrounding soil may be appropriately selected from the range of 50 mg to 2000 mg per plant, and in the case of injection into the pseudostem, the amount of active ingredient per plant may be appropriately selected from the range of 50 mg to 2000 mg. . If the banana fruit is in the growing season or after harvesting the banana fruit, the injection site in the case of injecting treatment may be injecting a predetermined dose into an arbitrary part of about 30 cm to 2 m from the surface of the remaining pseudostem part. . This treatment controls Sigatoka disease that occurs in growing bananas and, if harvested, it can also control Sigatoka disease that occurs in new pseudostems (child stocks) that emerge from the tubers that occur next. it can.

  Moreover, the Sigatoka disease control agent and its control method of this invention can be combined with the commercial system treatment of the insecticide or disinfectant currently performed conventionally. By combining these, significant effects can be obtained as compared with commercial system processing alone. Commercial system treatment includes spraying, application, irrigation, infusion treatment, etc., but spraying treatment is common and suitable for the combination of the present invention. When combining the Sigatoka disease control agent of the present invention and its control method and commercial system treatment, the order may be appropriately selected depending on the occurrence of Sigatoka disease, but the Sigatoka disease control of the present invention having a long-term control effect. It is preferable to perform the agent and its control method first.

As a plant of the family Gypsumaceae that can be controlled by the Sigatoka disease control agent of the present invention and its control method,
For example, the bananas Gros Michel, Cavendish, Dwarf Cavendish, Dwarf Chinese, Enano, Catura, Giant Caven Giant Cavendish, Gran Enano, Grande Nine, Williams Hybrid, Valery, Robust, Poyo, lancatan, Lacatan ), Examples of bananas of the family Bambooaceae such as Bout rond Can not be limited to these Musaceae plant. Particularly preferred are all bananas including Giant Cavendish, Dwarf Cavendish, Cavendish, Plantain, Red Banana, Apple Banana, Monkey Banana, Island Banana and the like that are generally cultivated for food.

  In addition, the sigatoka disease control agent and the control method of the present invention include a herbicide resistance gene, an insecticidal pest resistance gene, an anti-pathogenic substance production gene, an oil component modification and an amino acid. The same plant which is a gene recombinant (GMO) that has undergone gene conversion for useful traits such as a content-enhancing trait is also included.

In the Sigatoka disease control agent and its control method of the present invention, for the purpose of improving the effect on Sigatoka disease and controlling other pests, an agricultural and horticultural fungicide other than isoprothiolane as an active ingredient compound or an agricultural and horticultural insecticide is mixed. Can be used. Representative compounds of agricultural and horticultural fungicides or agricultural and horticultural insecticides that can be mixed for these purposes are exemplified below, but the present invention is not limited thereto.
Examples of agricultural and horticultural fungicides include thiazinyl (generic name: tiadinil), isothianyl (generic name: isobianil), probenazole (generic name: probenazole), tricyclazole (generic name: tricyclazole), azoxystrobin (azoxystrobin), pyra. Pyroclostrobin, propiconazole (generic name: propiconazole), organic copper (copper-8-quinolinolate), metminostrobin (generic name: metomominostrobin), calpropamide (generic name: carpropamid), fusalide (name) ), Kasugamycin (generic name: kazugamycin), pyrokilone (generic name: pyroquilon), pro Benazol (generic name: probenazole), acibenzoral-S-methyl (generic name: acibenzolar-S-methyl), flutolanil (generic name: flutolanil),

Mepronil (generic name: mepronil), furametopyr (generic name: furamepyr), penciclone (generic name: penflucuride), tifluzamide (generic name: thifluzamide), validamycin (generic name: validamycin), dichromedin (generic name: dicromezin) Generic name: ferimzone), guazatine (generic name: guazatine), microbutanyl (generic name: myclobutanil), hexaconazole (generic name: hexaconazole), difenoconazole (generic name: difenconazole), vitertanol (general name: bit)
Epoxyconazole (generic name: epoxiconazole), triazimephone (generic name: triadimefon), prochloraz (generic name: prochloraz), fenpropimorph (generic name: fenproprimorph), tridemorph (generic name: tridemorph) (general name: metalylx) ), Basic copper chloride, basic copper sulfate, mancozeb (generic name: mancozeb), propineb (generic name: propineb), ziram (generic name: ziram), thiuram (generic name: thiram),

Simoxanyl (generic name: cymoxanil), chlorothalonil (generic name: chlothalonil), difenoconazole (generic name: diphenoconazole), captan (generic name: captan), polyoxin (generic name: polyoxin), iprodione (generic name: iprodion) General name: procymidone), benomyl (generic name: benomyl), thiophanate-methyl (generic name: thiophanate-methyl), carbendazim (generic name: carbendazim), fosetyl-aluminium, general name z: hymexazole ), Oxolinic acid, fludioxonil (generic name: fludioxonil), mepanipyri (Generic name: mepanapirim), cyprodinil (generic name: cyprodinil), pyrimethanil (generic name: pyrimethanil), tolcrofos-methyl (generic name: tolclofos-methyl), phenoxanyl (generic name: fenoxanil) and the like.

  Examples of agricultural and horticultural insecticides include benfuracarb (generic name: benfurcarb), carbosulfan (generic name: carbosulfan), PHC (generic name: propoxur), furiocarb (generic name: furathiocarb), mesomil (generic name: methomyl). , NAC (generic name: carbaryl), bendiocarb (generic name: bendiocarb), alanicarb (generic name: alaniccarb), imidacloprid (generic name: nitenpyram), nitenpyram (generic name: nitenpyram), acetamiprid (generic name: aci id) , Thiamethoxam (generic name: thiamethoxam), clothianidin (generic name: clothianidin), dinotefuran (generic name: d notofuran, propofos (generic name: propaphos), ethylthiomethone (generic name: disulfon), diazinon (generic name: diazinon), trichlorfon (generic name: trichlorfon), fenthion (generic name: fenthion), acephate (generic name: acephate) ,

Isoxathion (generic name: isoxathion), isofenphos (generic name: isofenphos), chlorpyrifos-methyl (generic name: chlorpyrifos-methyl), chlorfenvinphos (generic name: chlorfenvinphos), dimethoate (generic name: dimethoate), Name: fonofos), pyridafenthion (generic name: pyrifafention), monocrotophos (generic name: monocrotphos), cartap (generic name: cartap), thiocyclam (generic name: thiocyclam), bensultap (generic name: bensultap)
Cycloproton (generic name: cyclopropathrin), etofenprox (generic name: etofenprox), silafluophene (generic name: silaflufen), tefluthrin (generic name: tefluthrin), buprofezin (generic name: bupofezin), flufenoxuron (generic name) : Flufenoxuron),

Cyromazine (generic name: cyromazine), rufenuron (generic name: lufenuron), tebufenozide (generic name: tebufenozide), methoxyphenozide (generic name: methoxyfenozide) (generic name: chromofenomide) Generic name: pyraclofos), Phostiazate (generic name: fostiazate), Fenpyroximate (generic name: fenproximate), Fipronil (generic name: fipronil), Endosulfan (generic name: endosulfan), Methaldehyde (general name: metaldehyde), Ememactin Benzoate (generic name: emanectine-benzoate) , Spinosad (generic name: spinosad), chlorfenapyr (generic name: chlorfenapyr), indoxacarb (generic name: indoxacarb), and the like.

Although the typical test example of this invention is illustrated below, this invention is not limited to these.
Test Example 1 Isoprothiolane spraying, irrigation, injection test / treatment method Spraying treatment: Using a spraying machine equipped with an engine, dilute 2L of isoprothiolane 40% emulsion with 100 times water (active ingredient amount: 800g / ha), It sprayed once with the dosage of 200L / ha so that it might become uniform to the leaf blade part of a plant body. After the spraying process, the number of functional leaves was calculated every 2, 9, 16, 23, 30, 37, 44, 51, and 58 days.
Irrigation treatment: 2 L of isoprothiolane 40% emulsion was diluted 800 times with water (active ingredient amount: 800 g / ha), and the drug solution was 1600 L / ha in the amount of 1600 L / ha. After the irrigation process, the number of functional leaves was calculated in the same manner as the spraying process.

 Injection treatment: 2 L of isoprothiolane 40% emulsion was diluted 2 times with water (active ingredient amount: 800 g / ha), and the drug solution was put into a 50 ml syringe equipped with a 17.5 cm needle, and the parent pseudostem after harvesting bananas 2 mL (active ingredient amount 0.4 g) was injected into a portion of about 1 m above the ground. In determining the effect of the injection treatment, the number of functional leaves was calculated by observing the disease state in the child pseudostem newly emerging from the root of the parent pseudostem.

Commercial system spraying treatment: 7 days and 14 days after the start of the test, a dose corresponding to 0.5 L / ha (active ingredient amount 360 g) of 72% flowable chlorothalonil was diluted with water corresponding to 200 L / ha. 21 days later, Tridemorf 86% oil 0.4L / ha (active ingredient amount 344g) and Pyraclostrobin 25% emulsion 0.4L / ha ((active ingredient amount 100g) After 31, 38, 45, 53 days, the amount of 1.5L / ha (active ingredient amount 1008g) of 72% flowable chlorothalonil diluted with water corresponding to 200L / ha was used as the engine. It sprayed so that it might become uniform to the leaf part of an object plant with an attached spraying processing machine.

Test scale: 1 strain, 80 shares The results are shown in Table 1.

  From the test results in Table 1, the treatment and development of banana sigatoka disease in a long period of time in the treatment area of foliar spray treatment, soil irrigation treatment or parental pseudostem injection treatment compared to the non-treatment group in one treatment. About 12 functional leaves were maintained until 23 days after the treatment, and a sufficient number of functional leaves was maintained until 30 days thereafter. The control effect is remarkable until 30 days after spraying, irrigating or injecting treatment of isoprothiolane once, and the control effect which is equal to or superior to that of commercial system spraying is continued until 58 days. The banana growth was maintained for a long time. This is a single treatment with isoprothiolane, which can control Sigatoka disease until 58 days later. During that time, commercial treatments with chlorothalonil, tridemorph, pyraclostrobin, etc. are sprayed 7 times, By using it once, there is a possibility that the seven times of spraying the medicine can be omitted. That is, the Sigatoka disease control agent and its control method comprising isoprothiolane of the present invention as an active ingredient can reduce the number of drug treatments and the amount of the drug compared to the conventional commercial system drug treatment. In addition, there is an effect that no load is applied to the environment.

Claims (12)

  An agent for controlling Sigatoka disease of a cereal family, comprising isoprothiolane as an active ingredient.   The Sigatoka disease control agent according to claim 1, wherein the plantaceae is a banana.   The Sigatoka disease control agent according to any one of claims 1 and 2, wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.   The Sigatoka disease control agent according to any one of claims 1 and 2, wherein the Sigatoka disease is a Sigatoka disease caused by Mycospharella fijiensis.   A method for controlling sigatoka disease of a plantaceae plant, comprising treating an effective amount of a drug containing isoprothiolane as an active ingredient on a plant body of a scallop plant plant in which a sigatoka disease is or is predicted to occur.   The method for controlling sigatoka disease according to claim 5, wherein the plant of the family Papaveraceae is a banana.   The treatment method is spraying or coating treatment of a banana leaf blade or pseudostem part, irrigation treatment to surrounding soil where the banana grows, or chemical injection treatment of a banana pseudostalk part. The method for controlling Sigatoka disease according to claim 1.   The method for controlling Sigatoka disease according to any one of claims 5 and 6, wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.   The method for controlling Sigatoka disease according to any one of Claims 5 and 6, wherein the Sigatoka disease is a Sigatoka disease caused by Mycospharella fijiensis.   In order to control Sigatoka disease occurring in a banana child pseudostem strain, an effective amount of a Sigatoka disease control agent is applied to the leaf part or pseudostem part of a banana parent pseudostem strain in which Sigatoka disease is occurring or is predicted to occur A method for controlling sigatoka disease of banana seedlings, characterized by performing spraying treatment or coating treatment, irrigation treatment to surrounding soil where bananas are grown, or chemical injection treatment to a parent pseudostem.   The method for controlling a Sigatoka disease according to claim 10, wherein the Sigatoka disease is a Sigatoka disease caused by Mycosphaerella musicola.   The method for controlling a Sigatoka disease according to claim 10, wherein the Sigatoka disease is a Sigatoka disease caused by Mycospharella fijiensis.