TWI590763B - Use of isoprothiolane - Google Patents

Description

Use of the name

The present invention relates to a plant leaf spot control agent, and a method for controlling the same, and a method for controlling the same, and a method for controlling the leaf spot disease, which is an active ingredient of the herbaceous leaf spot disease caused by banana leaf spot disease.

It belongs to the plant of the genus Musa, especially the banana is the general name of the edible fruit group, and the fruit is mainly cultivated in East Asia such as China, Taiwan, etc.; Southeast Asia of the Philippines, Indonesia, Thailand, Vietnam, etc.; West Asia; Brazil, Ecuador, Costa Rica, Mexico, Guatemala, Colombia, Peru, etc. Central and South America; Africa, Tanzania, Congo, Uganda, South Africa, etc., also implement large-scale agricultural cultivation and cultivate throughout the year . Cultivated in these countries, the harvested bananas are exported to all parts of the world.

In the cultivation of bananas, the roots of the stems are underground, and the parts of the stems that protrude from the top of the ground (the sheaths and sheaths) are called pseudo-stems. In fact, the leaves and sheaths overlap several layers, and the front ends of the pseudo-stems protrude long and round. The leaf (leaf body) further protrudes from the apex of the pseudo stem to the pedunele, and forms a whole box including a finger and a utricle at the front end thereof to grow a banana in the whole room. After the harvest of the banana, the pseudo-stem part (parent plant) was cut at the front and back of the ground 1 to 2 m. At that time, the new pseudo-stems (sub-strains) newly emerging from the roots of the underground are propagated in the same manner, or the new pseudo-stems (sub-strains) are mutated to reproduce the harvest of the bananas. In the cultivation of bananas, it is quite important to leave a few leaves (functional leaves). It is necessary to extract the leaves from the last leaves (before flowering) to the harvest for 3 months. Therefore, at least 12 to 13 leaves must be left in the flowering stage. Necessary. If the number of functional leaves is insufficient and the harvest of high-quality bananas cannot be expected, the plants are harvested during the cultivation.

There are leaf spot diseases in the main diseases of banana cultivation, yellow yellow leaf spot disease (Yellow Sigatoka) and black scorpion leaf spot disease (Black Sigatoka). Yellow leaf spot disease is caused by Mycosphaerella musicola and 黒 leaf spot disease caused by the disease of Mycosphaerella fijiensis, especially when the leaf spot disease occurs at high temperature and humidity. The leaves turn into a color that hinders light synthesis and halve the amount of harvest. The latent period of leaf spot disease is 3 weeks to 2 months. After that, the initial symptom of the banana that is affected is that there are small spots on the back of the leaves of the ancient leaves from 4 to 5 pieces from the parietal lobe, and a yellow strip is formed along the veins soon. Spot, gradually the lesions expand and become dark brown. If the victim is aggravated, almost all the leaves die and sag, leaving only 1 or 2 of the central leaves. The control of these diseases is based on monitoring the leaves of the bananas, judging by the location of the youngest leaves of the infection and the degree of infection, and all the leaves with the infection expansion are suspected.

Once the leaf spot disease is confirmed, an organic sulfur-based fungicide such as Mancozeb, an organic chlorine-based bactericide such as Chlorothalonil, or a pyrimidine-based bactericide such as pyrimethanil is used. Triazole-based fungicides such as Tridemorph and denpropimorf, trifonazoles such as difenoconazole, Bitertanol, Propiconon, and Epoxiconazole A methoxy acrylate strobilurin bactericide such as pyracolstrobin or azoxystrobin. These bactericides are dispersed in several intervals from 10 to 20 days.

The compound of the active ingredient of the leaf spot control agent of the present invention is 1,3-dithiolan-2-ylidenemalonate (diisopropyl 1,3-dithiolan-2-ylidenemalonate) The compound represented by the product is sold under the trade name "Fuji" as a rice fever control agent, and is a known compound (see, for example, Non-Patent Document 1). However, it is not described in Non-Patent Document 1 and it does not suggest that the name of Acacia can be used as a leaf spot control agent which occurs in Musa plants (especially bananas). It has long been used as a rice fever control agent, and has not been tried as a banana. Use of leaf spot control. In the field of fungicides, depending on the target crop and the target disease, the effective medicaments are different, and it is found that the market effect requires excessive trial and error.

Prior technical literature Non-patent literature

Non-Patent Document ^{1 The Pesticide Manual 14 th Edition (} British Crop Production Council)

As mentioned above, although the control of leaf spot disease is the most important issue for banana cultivation, it has to be treated with multiple chemicals according to the prior art, so its labor is quite large, and the prevention of leaf spot disease is caused by the emergence of drug-resistant bacteria. difficult. Therefore, it is necessary to reduce the amount of the treatment agent and reduce the environmental load, and the novel leaf spot disease control agent and the labor-saving prevention method.

The inventors of the present invention have succeeded in researching the above-mentioned problems, and have found that bananas treated with anthraquinone as an active ingredient can effectively prevent banana leaf spot disease for a long period of time compared with the prior art, and finally complete the present invention. .

That is, the present invention relates to at least the following inventions.

(1) A leaf spot disease (Sigatoka) control agent for controlling a leaf spot disease control agent which occurs in a leaf spot disease of a Musa family plant, and is characterized in that it contains an isoflavone as an active ingredient.

(2) The leaf spot control agent according to (1), wherein the Musa plant is a banana.

(3) The leaf spot control agent according to (1) or (2), wherein the leaf spot disease is caused by leaf spot disease of Mycosphaerella musicola.

(4) The leaf spot control agent according to (1) or (2), wherein the leaf spot disease is caused by leaf spot disease of Mycosphaerella fijiensis.

(5) A method for controlling leaf spot disease, which is a method for controlling leaf spot disease caused by leaf spot disease of Musa plants, characterized in that a plant body of a Musa plant which develops or predicts leaf spot disease occurs An effective amount of a medicament that treats as an active ingredient.

(6) The method for controlling leaf spot disease according to item (5), wherein the Musa plant is a banana.

(7) The method for controlling leaf spot disease according to item (5) or (6), wherein the treatment method is the method of dispersing or coating the leaf body to the pseudo stem portion of the banana, perfusing the soil around the banana, or The pseudo stem of the banana is injected.

(8) The method for controlling leaf spot disease according to item (5) or (6), wherein the leaf spot disease is caused by leaf spot of the bacterium of the genus Banana.

(9) A method for controlling leaf spot disease according to (5) or (6), wherein the leaf spot disease is caused by leaf spot of the genus Fibulae of Fiji.

(10) A method for controlling leaf spot disease of a banana seed strain, which is characterized in that the leaf body of a banana progeny stem plant which occurs or predicts leaf spot disease is formed to prevent leaf spot disease which occurs in a banana leaf pseudo-stem plant From the part to the pseudo-stem part, the effective amount of the leaf spot control agent is subjected to a dispersing treatment or a coating treatment, a perfusion treatment to the surrounding soil where the banana is grown, or an injection treatment to the pseudo stem portion of the banana.

(11) The method for controlling leaf spot disease according to item (10), wherein the leaf spot disease is caused by leaf spot of the bacterium of the genus Banana.

(12) A method for controlling leaf spot disease according to item (10), wherein the leaf spot disease is caused by leaf spot of the genus Fibulae of Fiji.

(13) A method for controlling the use of leaf spot disease, which is an agent for the control of leaf spot disease, which is characterized by the use of a drug as an active ingredient in the treatment or occurrence of leaf spot disease. The plant of the plant of the family of leaf spot disease to prevent the disease.

(14) The use of leaf spot prevention as in (13), wherein the Musa plant is a banana.

(15) The use of leaf spot prevention according to item (14), wherein the treatment method is to spread or coat the leaf body to the pseudo stem of the banana, infuse the soil around the banana, or pseudo-before the banana Stem injection treatment.

(16) The use of leaf spot prevention according to (13) or (14), wherein the leaf spot disease is caused by leaf spot of the bacterium of the genus Banana.

(17) The use of leaf spot prevention according to (13) or (14), wherein the leaf spot disease is caused by leaf spot of the genus Fibulae of Fiji.

According to the present invention, leaf spot disease which occurs or is predicted to occur in Musa plants (especially bananas) can be effectively prevented. The effective amount of the leaf spot control agent which uses Yatson as an active ingredient is spread or coated on the leaf body and pseudo stem of the banana, infused into the soil around the banana, or in a pseudo stem. Injecting treatment, etc., has shown a significant control effect on banana leaf spot disease for a long time. In addition, it is treated with the pro-pseudo-stem (parent plant), and the new pseudo-stem (strain) from the new tuber of the underground also has the effect of preventing the onset of leaf spot. Further, the leaf spot control agent and the method for controlling the same according to the present invention and the use thereof can continue to prevent the effect for a long period of time, so that it is possible to reduce the number of times of spreading of the drug and to reduce the environmental load.

(to implement the form of the invention)

The control agent which is used as an active ingredient in the present invention is generally commercially available under various trade names under the trade name "Fuji", and a pharmaceutical agent which is compatible with the intended use of the present invention is commercially available. For example, in the case of dispersion or coating, an emulsion, a suspending agent, an oil agent, a hydrating agent and the like are preferred. In the case of soil infusion, emulsions, suspending agents, granules, hydrating agents, and the like are preferred; in the case of infusion treatment of the sheath and sheath, emulsions, suspending agents, and hydrating agents are preferred dosage forms.

For banana cultivation, generally 1,500 to 2,000 bananas per hectare are cultivated, but the amount of treatment is preferably: in the case of spreading and coating treatment, depending on the amount of active ingredients in the range of 200g to 2000g per hectare; In the surrounding soil, the amount of the active ingredient is in the range of 0.05 g to 2 g per plant; in the case of injecting into the pseudo stem, the amount of the active ingredient per plant is in the range of 0.05 g to 2 g. If the effectiveness component of each treatment method is less than the above numerical value, there is no sufficient effect; if too much, there is a concern that the medicinal damage cannot be predicted. In the injection site where the injection treatment is carried out, if the fruit of the banana is harvested in the growth stage or the banana fruit, the predetermined dose is 0.34~2m from the surface of the remaining pro-pseudo stem (parent plant). Inject it. In this way, leaf spot disease caused by growing bananas is treated, and if it is harvested, it can also prevent leaf spot disease which is caused by the tuber part and occurs in the new pseudo-stem (sub-strain).

Although the above treatment is effective in the growth stage of any banana, but the effect is better, the spreading treatment or the perfusion treatment is performed within a period of less than 3 months after the new planting or harvesting, and the injection treatment is performed after the pro-pseudo-plumb is cut. It is better to process until about 30 days. It is particularly preferable that the dispersion treatment or the infusion treatment is within 2 months, and the treatment at an earlier period of the injection treatment within 20 days is particularly preferable. The leaf spot control agent of the present invention can also be used for preventive treatment before the onset of leaf spot disease, because it has the preventive effect obtained by the prophylactic treatment of the leaf spot disease and the therapeutic effect obtained after the onset of the disease. Therapeutic treatment is performed after the onset of the disease.

Furthermore, the leaf spot control agent of the present invention and the method for controlling the same, and the use thereof, can be combined with the commercial system treatment of the previously applied insecticide or bactericide. The combination has a significant effect compared to commercial system only treatment. For the treatment of commercial systems, it may be a dispersion, a coating, a perfusion, an injection treatment, etc., but it is more general in the dispersion treatment and is suitable for the combination of the present invention. In the case where the leaf spot control agent of the present invention and the method for controlling the same and the use thereof are combined with the treatment of a commercial system, the order is more appropriately selected according to the occurrence of leaf spot disease, and the previous control effect with long-term control effect is performed. The leaf spot control agent of the invention and the method for controlling the same and its use are preferred.

For the leaf spot control agent of the present invention and the method for controlling the same, and the plant of the Musa family to be used, for example, Gros Michel, Cavendish, Cave Kajangtai ( Dwarf Cavendish), Dwarf Chinese, Enano, Caturra, Giant Cavendish, Gran Enano, Grande Naine, William Mix (Williams Hybrid), Valery, Robust, Poyo, Lacatan, Monte cristo, Bout rond, Bananas of Musa plants such as Plantain, but not limited to these Musa plants. It is especially preferred to be cultivated as a food, including Giant Kayuntai, Cave Jiayuntai, Jiayuntai, Putian, Red Banana (Variety: Morado), Apple Banana, and Banana (Variety: Nirvana) Island bananas (cultivated in Okinawa, Amami Oshima, etc.), Da Nai (a modified species of giant Kayuntai), and all bananas such as Chifle (a type of blue sky).

Further, in the object of the present invention, the Musa plant also includes a herbicide-tolerant gene, an insecticidal pest resistance gene, an anti-pathogenic substance-producing gene, an oil grain component-modified or an amino acid-containing enhanced trait. Such useful traits as the same plant of the gene-transformed genetic recombinant (GMO).

In the present invention, in order to improve the effect on leaf spot disease or to control other pests, the active ingredient compound Acacia can be used as a horticultural fungicide, agricultural and horticultural insecticide, acaricide, nematicide. , biological pesticides and other mixed use. Representative compounds of agricultural and horticultural insecticides, acaricides, nematicides, and agricultural and horticultural fungicides which can be mixed for these purposes are exemplified below, but the present invention is not limited thereto.

Examples of agricultural and horticultural insecticides, acaricides, and nematicides include, for example, XMC (chemical name: methyl 3,5-dimethylphenylcarbamate), PCBS (chlorfenson), and arrinathrin. Azadirachtin, azinphos-methyl, acequinocyl, acetamiprid, acetoprole, acephate, abatatin Abamectin), avermectin-B, amidoflumet, amitraz, alanycarb, aldicarb, aldoxycarb, ol Aldrin, alpha-endosulfan, alpha-cypermethrin, albendazole, allethrih, isazofos, thiazophos ), isoxathion, isofenphos, isoprocarb (MIPC), ivermectin, imicyafos, imidacloprid, methicillin ( Imiprothrin), indoxacarb, esfenvalerate, ethiofencarb, ethion, ethiprole, etoxazole ), ethofenprox, ethoprophos, etrimfos, emamectin, emamectin-benzoate, endosulfan, Equivalentin, oxamyl, oxydemeton-methyl, oxydeprofos (ESP), oxibendazole, oxfendazole, Potassium oleate, sodium oleate, cadusafos, cartap, carbaryl, carbosulfan, carbofuran , gamma-cyhalothrin, xylylcarb, quinaphos, kinoprene, chinomethionat, cloethocarb, konni Ding (clothianidin), clefentezine, chromafenozide, chlorantraniliprole, chlorethoxyfos, chlordimeform, chlordane, chlorpyrifos , chlorpyrifos-methyl, chlorphenapyr, chlorfenson, chlorfenv Inphos), chlorfluazuron, chlorobenzilate, chlorobenzoate, dicofol, salithion, cyanophos (CYAP), rifampin (diafenthiuron), diamidafos, cyantraniliprole, theta-cypermethrin, dienochlor, cyenopyrafen, dioxabenzofos ), diofenolan, sigma-cypermethrin, dichlofenthion (ECP), cycloprothrin, dichlorvos (DDVP), disulfide ( Disulfoton), dinotefuran, cyhalothrin, cyphenothrin, cyfluthrin, diflubenzuron, cyflumetofen, fluorotetrazine (diflovidazin), cyhexatin, cypermethrin, dimethylvinphos, dimethoate, dimefluthrin, silafluofen , cyromazine, green insecticide (spinetoram), spinosad, spirodiclo Fen), spirotetramat, spiromesifen, sulfluramid, sulprofos, sulfoxaflor, Z-sainin -cypermethrin), diazinon, tau-fluvalinate, dazomet, thiacloprid, thiamethoxam, thiodicarb, sulphur Thiocyclam, thiosultap, thiosultap-sodium, thionazin, thiometon, deet, dieldrin, Tetrachlorvinphos, tetradifon, tetramethylfluthrin, tetramethrin, tebupirimfos, tebufenozide, pyridinium Tebufenpyrad, tefluthrin, teflubenzuron, demeton-S-methyl, temephos, deltamethrin , terfufos, tralopyril, tralmethrin, transfluthrin, triazamate, triazophos Azuron), trichlamide, trichlorphon (DEP), triflumuron, tolfenpyrad, naled (BRP), nicotine insecticide (nithiazine) ), nitenpyram, novaluron, noififumuron, hydroprene, vaniliprole, vamidothion, parathion , parathion-methyl, halfenprox, halofenozide, bistrifluron, bisultap, hydramethylnon, hydroxy Hydroxy propyl starch, binapacryl, bifenazate, bifenthrin, pymetrozine, pyraclorfos, pyrafluprole, must Pyridafenthion, pyridaben, pyridalyl, pyrifluquinazon, pyriprazole, pyriproxyfen, bicap (pirimicarb), Pyrimidifen, pirimiphos-methyl, pyrethrins, fen Fipronil, fenazaquin, fenamiphos, bromopropylate, fenitrothion (MEP), fenoxycarb, fenothiocarb, phenyl ether Phenophane, fenobucarb, fensulfothion, fenthion (MPP), phenthoate (PAP), fenvalerate, fenflurine Fenpyroximate), fenpropathrin, fenbendazole, fosthiazate, formetanate, butathiofos, buprofezin, furathiocarb ), prallethrin, fluacrypyrim, fluazinam, fluazuron, fluensulfone, flucycloxuron, flucythrinate, Fluvalinate, flupyrazofos, flufenerim, flufenoxuron, flufenzine, flufenoprox, fluproxyfen Fluflucythrinate, flubendiamide, flumethyrin Rin), flurimfen, prothiofos, protrifenbute, flonicamid, propaphos, propargite (BPPS), horror Profenofos, profluthrin, propoxur: PHC, bromopropylate, beta-cyfluthrin, hexaflumuron, synapto (hexythiazox), heptenophos, permethrin, benclothiaz, bendiocarb, bensultap, benzoximate, benfuracarb ), phoxim, phosalone, fosthiazate, fosthietan, phosphamidon, phosphocarb, phosmet: PMP ), liuyangmycin complex (polynactins), formetanate, formothion, phorate, machine oil, malathion, pulse heart ( Milbemycin), milbemycin-A, milbemectin, mecarbam, mesulfenfos, nanet ( Methomyl), metaldehyde, metaflumizone, methamidophos, metam-ammonium, metam-sodium, metimocarb, extinction Methalthion (DMTP), methylisothiocyanate, methylneodecanamide, methylparathion, metoxadiazone, methoxychlor, Methoxyfenozide, metofluthrin, metoprene, metolcarb, meperfluthrin, mevinphos, sub Monocrotophos, monosultap, lambda-cyhalothrin, ryanodine, lufenuron, resmethrin, bioderives Insecticide (lepimectin), rotenone, levamisol hydrochloride, fenbutatin oxide, morantel tartarate, Methyl bromide, tricyclohexyltin hydroxide (cyhexatin), calcium cyanamide, calcium sulphide (Calcium Agricultural and horticultural insecticides, acaricides, nematicides, such as polysulfide), sulfur (Sulfur), and nicotine-sulfate.

For the agricultural and horticultural fungicides used for the same purpose, for example, aureofungin, azaconazole, azithiram, acypetacs, Acibenzolar, acibenzolar-S-methyl, azoxystrobin, anilazine, amisulbrom, aminopropyl phosphate (ampropylfos), amidoctradin, allyl alcohol, aldimorph, amabam, isotianil, isovadionone ), isopyrazam, ipconazole, iprodione, iprovalicarb, iprobenfos, imazalil, iminoctadine , iminoctadine-albesilate, iminoctadine-triacetate, imibenconazole, uniconazole, uniconazole-P , echlomezole, edifenphos, etaconazole, ethabazole m), ethirimol, etem, ethoxyquin, etridiazole, enestroburin, epoxiconazole, sputum (oxadixyl), oxycarboxin, copper-8-quinolinolate, oxytetracycline, copper-oxinate, oxpoconazole, cyansulfazole Oxpoconazole-fumarate, oxolinic acid, octhilinone, ofurace, oressastrobin, metam-sodium Soil fungicides, kasugamycin, carbamorph, carpropamid, carbendazim, carboxin, carvone, quinac Amine (quinazamid), quinacetol, quinoxyfen, quinomethionate, captafol, captan, kiralaxyl, quinol Quinconazole, quintozene, guazatine, cufraneb, cuprobam, glyo Din), griseofulvin, climbazole, cresol, kresoxim-methyl, chlozolinate, clottrimazole, carbazole Chlobenthiazone), chloraniformethan, chloranil, chlorquinox, chloropicrin, chlorfenazole, chlorodinitronaphthalene, tetrachlorodicyanide Benzyl (chlorothalonil), chloroneb, zarilamid, salicylanilide, cyazofamid, diethyl pyrocarbonate, carbendazim Diethofencarb), cyclafuramid, diclocymet, dichlozoline, diclobutrazol, dichlofluanid, cycloheximide, Dimlomezine, dicloran, dichlorophen, dichlonone, disulfiram, ditalimfos, dithianon, alken Diniconazole, diniconazole-M, zineb, Dinocap, dinocton, dinosulfon, dinoterbon, dinobuton, dinopenton, dipyrithione, two Benzoquinones such as diphenylamine, difenoconazole, cyflufenamid, diflumetorim, cyproconazole, cyprodinil, cyprofuram, etc. Amine compounds, cypendazole, simeconazole, dimethirimol, dimethomorph, cymoxanil, dimoxystrobin, methyl bromide Methyl bromide), ziram, silthiofam, streptomycin, spiroxamine, sultropen, sedaxane, saponin (zoxamide), dazomet, thiadiazin, tiadinil, thiadifluor, thiabendazole, tioxymid, sulfur Thiochlorfenphim, thiophanate, thiophanate-methyl, thiabendazole (thicyofen) ), thioquinox, chinomethionat, thifluzamide, thiram, decafentin, tecnazene, gram rot (tecloftalam), tecoram, tetraconazole, debacarb, dehydroacetic acid, tebuconazole, isobufloquin, and more Dodicin, dodine, dodecylbenzene sulfonate bis(diethyldiamine) copper salt (II), (DBEDC), dodemorph (dodemorph), sputum (drazoxolon), triazole Triadimenol, triadimefon, triazbutil, triazoxide, triamiphos, triarimol, trichlamide, three races Tricyclazole, triticonazole, tridemorph, tributyltin oxide, triflumizole, trifloxystrobin, triforine, Tolylfluanid, tolclofos-methyl, natamycin, nabam, fentanyl isopropyl Trothal-isopropyl), nitrostyrene, nuarimol, copper nonylphenol sulfonate (copper nonylphenol sulfonate), halacrinate, validamycin , valifenalate, harpin protein, bixafen, picoxystrobin, picobenzamide, bithionol, biconic ( Bitertanol), hydroxyisoxazole, hydroiaoxazole-potassium, binapacryl, biphenyl, piperalin, hymexazol, azalea Pyraoxystrobin, pyracarbolid, pyraclostrobin, pyrazophos, pyrametostrobin, pyriofenone, pyridinitril ), pyrifenox, pyripencarb, pyrimethanil, pyroxychlor, pyroxyfur, pyroquilon, exempt Vinclozolin, famoxadone, fenapanil, imidacloprid (fen Amidone), fenaminosulf, fenarimol, fenitropan, fenoxanil, ferimzone, ferbam, fentin , fenpiclonil, fenpyrazamine, fenbuconazole, fenfuram, fenpropidin, fenpropimorph, cycloheximide (fenhexamid), phthalide, buthiobate, butylamine, bupirimate, fuberidazole, blasticidin-S, Fula Ratio (furametpyr), furalaxyl, fluacrypyrim, fluazinam, fluoxastrobin, fluotrimazole, fluopicolide, fluoride Fluopyram, fluoroimide, furcarbanil, fluxapyroxad, fluquinconazole, furconazole, Fluconazole-cis, fludioxonil, flusilazole, flusulfamide, flutianil Flutolanil, flurifaol, furfural, furmecyclox, flumetover, flumorph, proquinazid, poker Prochloraz, procymidone, prothiocarb, prothioconazole, propamocarb, propiconazole, propineb, furfuryl Furophanate, probenazole, bromuconazole, hexachlorobutadiene, hexaconazole, hexylthiofos, bethoxazin Benalaxyl, benaxyl-M, benodanil, benomyl, pefurazoate, benquinox, pingke Penconazole), benzamorf, pencycuron, benzohydroxamic acid, bentaluron, bethithiazole, benzimidil-isopropyl (benthiavalicarb) -isopropyl), penthiopyrad, penflufen, boscalid, chlorine Phosdiphen, fosetyl, fosetyl-A1, polyoxins, polyoxorim, polycarbamate, sterilized dan (folpet) ), formaldehyde, machine oil, maneb, mancozeb, mandipropamid, myclozolin, myclobutanil, rice Mildiomycin, milneb, mecarbinzid, methasulfocarb, metazoxolon, metam, weibaimu sodium salt Metam-sodium), metalaxyl, metalaxyl-M, metiram, methyl isothiocyanate, methyl white powder (mepthyldinocap), extant (metconazole), metsulfovax, methfuroxam, metominostrobin, metrafenone, mepanipyrim, mefenoxam, enemies Meptyldinocap, mepronil, mebenil, iodomethane, rabenzazole, benzalkonium chloride (benza Inorganic fungicides such as lkonium chloride), basic copper chloride, basic copper sulfate, silver, etc., sodium hypochlorite, copper hydroxide (sodium hypochlorite) Cupric hydroxide), wettable sulfur, calcium polysulfide, potassium hydrogen carbonate, sodium hydrogen carbonate, inorganic sulfur, copper sulfate A copper-based compound such as an anhydride, nickel dimethyldithiocarbamate or oxine copper, zinc sulfate or copper sulfate; and agricultural and horticultural fungicides.

(Example)

Representative test examples of the present invention are exemplified below, but the present invention is not limited thereto.

Test Example 1. Banana leaf spot control test (distribution treatment area)

2L of 40% emulsion of Aspirin is diluted with water to 100 times, and the liquid is equivalent to 200L per hectare (800g/ha of active ingredient) in newly cultivated bananas (plant height 1m, variety: Qi The leaf body of Chifle (one of the blue sky) is evenly spread once. After the dispersion treatment, the number of functional leaves of each plant was investigated on the 2nd, 9th, 16th, 23rd, 30th, 37th, 44th, 51st, and 58th, and the number of functional leaves per plant was calculated. The results are shown in Table 1.

Test Example 2. Banana leaf spot control test (infusion treatment area) of Inya-treated perfusion treatment

2L of 40% emulsion of Aspirin is diluted with water to 800 times, and the liquid is applied to bananas according to 1L per plant (0.5g of active ingredient) (plant height 1m, variety: Chifle, The soil surface around the plant of a kind)) is perfused. After the perfusion treatment, the number of functional leaves per plant was calculated in the same manner as in Test Example 1. The results are shown in Table 1.

Test Example 3. Banana leaf spot control test (injection treatment area) of Iniya injection

2L of 40% emulsion of Afforestation is diluted 2 times with water, and the upper part of the pro-pseudo-stalk is 1 m after the harvest of the banana (plant height: 1.5 m, variety: Chifle (a type of blue sky)) with a syringe. In the left and right, the injection treatment was 2.5 mL (the amount of the active ingredient was 0.4 g). The effect of the injection treatment was judged by the number of functional leaves of each of the pseudo-stem portions newly formed by the root portion of the pro-pseudo-stem portion, and was calculated and evaluated in the same manner as in Test Example 1. The results are shown in Table 1.

Comparative test example 1. Banana leaf spot control test (commercial system treatment area) treated according to commercial system

At 7 and 14 days after the start of the test, 0.5 L of Chlorothalonyl 72% flow agent was diluted 400 times with water, equivalent to 200 L per hectare (360 g/ha of active ingredient). The liquid is evenly distributed on the leaf body of the banana (plant height: 1 m, variety: Chifle (one of the blue sky)). 21 days later, Tridmorf 86% oil 0.4L and Pyraclostrobin 25% emulsion 0.4L diluted 500 times with water, equivalent to 200L per hectare (effective by Sandefene) The chemical solution having a component amount of 344 g/ha and an active ingredient of pyraclostrobin of 100 g/ha was uniformly dispersed in the blade body. Further, on the 31st, 38th, 45th and 53rd, 1.5L of tetrachlorodiphenylbenzene 72% flow agent is diluted 133 times with water, which is equivalent to 200L per hectare (1008g/ha according to the active ingredient). The liquid is evenly distributed in the body of the leaf. In the same manner as in Test Example 1, the number of functional leaves per plant was calculated on the scheduled survey day. The results are shown in Table 2.

Further, banana leaf spot disease in all of the treatment areas and the non-treatment areas of Test Examples 1 to 3 and Comparative Test Example 1 occurred naturally, and was mainly caused by leaf spot disease, but mixed with yellow leaf spot disease. The scale of the experiment was 80 bananas in all treatment areas. Since there are more than 40 days in the flowering period of this test, as long as there are more than 8 functional leaves, there is no obstacle to the growth of bananas, and it can be evaluated to fully prevent leaf spot disease.

As a result of the first table, compared with the untreated area treated with one dose of the drug, the spread treatment zone, the perfusion treatment zone or the injection treatment zone of the Yassin has long-term inhibition of the onset and progression of banana leaf spot disease, and the function After the leaves were treated for 58 days, the leaves were maintained at 8 or more, showing sufficient leaf spot control effect. Among all the treatment methods, the treatment of the sub-sputum showed the same as the commercial system treatment area in which the three kinds of chemicals of tetrachlorodicyanobenzene, tripdene and pyraclostrobin were dispersed 7 times. effect. That is, compared with the prior art commercial system treatment, the leaf spot control agent having the active ingredient of the present invention and the method for controlling the same, and the use thereof, can reduce the number of treatments and the amount of the drug, and I learned that it can work to solve the excellent results of the original project.

Test Example 4. Control of leaf spot disease control by A. sinensis (according to evaluation of disease index)

Add 1L of Acacia 40% emulsion and 7L of plantain oil (product name: SPRAYTEX) to 15L of water, and add 23L per hectare (400g/ha of active ingredient) to banana (plant height: 1.5m, variety: large tolerance) the leaf body is evenly distributed. The treatment was carried out once a week for a total of 10 times for 10 weeks, and the treatment of the occurrence of the disease was started for 3 weeks, and the weekly damage degree was further investigated. The method of investigation is to investigate the degree of damage of leaves according to the following criteria of the Gauhl modified Stover method, and calculate the average as the disease index. The results are shown in Table 2.

In addition, in this test, banana leaf spot disease occurs naturally, although it is centered on eucalyptus leaf spot, but it is mixed with yellow leaf spot disease. The scale of the experiment was 9 bananas. As long as the disease index is 2.0 or less in this test, there is no obstacle to the growth of the banana, and it can be evaluated as adequate prevention of leaf spot disease.

Benchmark symptom

0 no symptoms

1 by the micro-signure of the line ~ 10 lesions

2 from 11 lesions to 5% or less of the leaf area

3 5% to 15% of the area of the victim

4 16% to 33% of the area of the victim

5 34% to 50% of the area of the victim

6 Killed more than 50% of the leaf area

Table 2 Disease index

From the results of the second table, it was found that the number of healthy leaves with the initial infection or the spot symptoms could not be determined in the sub-sputum treatment area. After 10 weeks, the disease index fell below 1 but the no-treatment area was 7 weeks. The disease index of the birth of bananas has risen to more than 2; and the treatment area of the Bianzi treatment area with no treatment area has been known to significantly inhibit the onset and progression of banana leaf spot disease. That is, the banana leaf spot control agent and the method for controlling the same according to the present invention and the use thereof not only inhibit the onset and progression of banana leaf spot disease, but also achieve the effect of inhibiting the damage of the leaf spot of the whole plant body, and the result is banana. Fully fertility and maintain high quality.

Claims (9)

A use of isoprothiolane for controlling leaf spot disease occurring in Musa plants. For example, the use of the sub-therapy of the first paragraph of the patent application is an effective amount of a medicament for treating a plant of the Musa plant that develops or is expected to have leaf spot disease as an active ingredient. For example, the application of the sub-category of the second paragraph of the patent application, wherein the Musa plant is a banana. For example, in the application of the second item of the patent scope, the treatment method is to spread or coat the leaf body to the pseudo stem of the banana, infuse the soil around the banana, or inject into the pseudo stem of the banana. deal with. The use of the scorpion of any one of the claims 1 to 4, wherein the leaf spot disease is caused by leaf spot disease of Mycosphaerella musicola. The use of the scorpion of any one of the claims 1 to 4, wherein the leaf spot disease is caused by leaf spot of Mycosphaerella fijiensis. A method for controlling leaf spot disease of a banana plant, which is characterized in that, in order to prevent leaf spot disease occurring in a banana stem plant, a leaf stem of a banana progeny stem plant which develops or is predicted to occur leaf spot disease to a pseudostem In the Ministry, the effective amount of the agent containing Aspirin as an active ingredient is subjected to a dispersing treatment or a coating treatment, a perfusion treatment to the surrounding soil where the banana is grown, or an injection treatment to the pro-pseudo-stem portion. For example, the method for controlling leaf spot disease according to item 7 of the patent application scope, wherein leaf spot disease is caused by leaf spot of the bacterium of the genus Banana. For example, the method for controlling leaf spot disease according to item 7 of the patent application scope, wherein leaf spot disease is caused by leaf spot of the genus Fibulae of Fiji.