Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
  • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
  • C07D495/04—Ortho-condensed systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D519/00—Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00

Definitions

• This invention is related to the field of thieno-pyrimidine compounds having fungicidal activity.
• Fungicides are compounds, of natural or synthetic origin, which act to protect plants against damage caused by fungi. However, no one fungicide is useful in all situations. Consequently, research is being conducted to produce fungicides that have better performance, are easier to use, and that cost less.
• DE 2,654,090 and U.S. Patent 4,146,716, incorporated herein by reference disclose thieno-pyrimidine compounds useful for controlling fungal, viral and bacterial plant diseases.
• U.S. Patent 4,196,207, incorporated herein by reference discloses similar compounds useful in controlling infestations of ticks on animals.
• CA 2,038,521 and EP-447,891 disclose thieno-pyrimidine derivatives useful as insecticides, growth regulators and herbicides.
• GB2043061 discloses thienopyrimidine derivatives as plant fungicidal, bactericidal, antiviral, insecticidal and growth regulating compounds.
• Other references which teach various thieno-pyrimidine compounds for fungicidal use include JP 1995010712, JP03063266, EP-424125, and U.S. 5,141,941 (incorporated herein by reference).
• Pharmaceutical uses of thieno-pyrimidines have also been disclosed in U.S. 5,654,307 (incorporated herein by reference).
• the present invention relates to thieno-pyrimidines, particularly thieno[2,3-d]pyrimidines and their use as fungicides.
• the compounds of the present invention offer protection against ascomycetes, basidiomycetes, deuteromycetes and oomycetes.
• the present invention relates to compounds having the Formula (I):
• each Rl, R2 and R3 is independently selected from the group consisting of H, halogen, and alkyl;
• A is selected from the group consisting of H and alkyl; W is selected from the group consisting of NH and O; D is selected from O, NH and S;
• E is (-C(O)-)p-R', wherein p is O or 1 and R' is selected from the group consisting of optionally substituted rings selected from phenyl, furanyl, pyridinyl, pyridinyl-N-oxide, pyrimidinyl, pyridazinyl, pyrazinyl, thiazolyl, triazinyl, thiadiazolyl, oxazolyl, isoxazolyl, thienopyrimidinyl, and pyrimidine fused with an aromatic or heteroaromatic ring selected from benzene, oxazole, isoxazole, furan, thiazole, pyrimidine, pyridine, pyrrole, pyrazine, and thiophene; each ring being optionally substituted with one or more substituents selected from the group consisting of alkyl, alkenyl, alkynyl, halogen, haloalkyl,
• B is selected from the group consisting of halogen, alkyl, haloalkyl, and haloalkoxy; n is an integer from 0 to 3; and m is an integer from 0 to 4
• alkyl refers to an unbranched, or branched, carbon chain having from 1 to 8 carbon atoms (C 1 -C 8 alkyl) unless specified otherwise, including methyl, ethyl, propyl, butyl, isopropyl, isobutyl, tertiary butyl, pentyl, hexyl and the like, preferably from 1 to 6 carbon atoms (C 1 -C 6 alkyl) and most preferably from 1 to 3 carbon atoms (C 1 -C 3 alkyl).
• alkenyl refers to an unbranched, or branched, carbon chain having from 3 to 8 carbon atoms, including ethenyl, propenyl, butenyl, isopropenyl, isobutenyl, propynyl, butynyl and the like, preferably from 3 to 6 carbon atoms (C 3 -C 6 ).
• 'R' refers to the group consisting of Cr 8 alkyl, C 3-8 alkenyl or C 3-8 alkynyl, unless stated otherwise.
• alkoxy refers to an -OR substituent.
• alkylcarbonyl refers to a -C(O)-R substituent.
• alkylsulfonyl refers to an -SO 2 -R substituent.
• alkylsulfoxide refers to an -S(O)-R substituent.
• alkylthio refers to an -S-R substituent.
• aminoamino refers to an -N-N-C(O)R substituent.
• aminocarbonyl refers to -C(O)-NH 2 substituent.
• cyano refers to a -C ⁇ N substituent.
• haloalkoxy refers to a -OR-X substituent, wherein R may be substituted with X based on the formula wherein X is Cl, F, Br, or I, or any combination thereof and y is an integer from O to 2n+l .
• haloalkyl refers to an alkyl, alkenyl or alkynyl substituent which is substituted with Cl, F, I, or Br.
• halogen or halo refers to one or more halogen atoms, defined as F, Cl, Br, and I.
• hydroazidocarbonyl refers to -C(O)-N-N-R (2) , wherein R is H or C 1 -C 3 alkyl.
• hydroxycarbonyl refers to a -C(O)-OH substituent.
• nitro refers to a -NO 2 substituent.
• phenoxyalkyl refers to a -R-O-phenyl substituent.
• phenylcarbonyl refers to an -C(O)-phenyl substituent.
• the compounds of the present invention are those represented by Formula I wherein:
• Rl is halogen
• R2 and R3 are each H; A is H;
• W is selected from the group consisting of NH and O;
• E is selected from the group consisting of optionally substituted pyridine, pyridine-N-oxide, pyrimidine, thiazole, and thienopyrimidine, optionally substituted with one or more groups selected from the group consisting of alkyl, haloalkyl, alkoxy, haloalkoxy, alkylsulfonyl, halogen, alkylcarbonyl, alkoxycarbonyl, aminocarbonyl, hydroxycarbonyl, alkoxycarbonyl, formyl, hydrazidocarbonyl, alkoxyimino, alkoxyiminoalkyl, nitro, and cyano;
• Another embodiment of the present invention is a use of a compound of Formula I, for protection of a plant against attack by a phytopathogenic organism or the treatment of a plant infested by a phytopathogenic organism, comprising applying a compound of Formula I, or a composition comprising said compound to soil, a plant, a part of a plant, foliage, and/or seeds.
• another embodiment of the present invention is a composition useful for protecting a plant against attack by a phytopathogenic organism and/or treatment of a plant infested by a phytopathogenic organism comprising a compound of Formula I and a phytologically acceptable carrier material.
• the compounds are applied by any of a variety of known techniques, either as the compounds or as formulations comprising the compounds.
• the compounds may be applied to the roots, seeds or foliage of plants for the control of various fungi, without damaging the commercial value of the plants.
• the materials are applied in the form of any of the generally used formulation types, for example, as solutions, dusts, wettable powders, flowable concentrates, or emulsifiable concentrates.
• the compounds of the present invention are applied in the form of a formulation, comprising one or more of the compounds of Formula I with a phytologically acceptable carrier.
• Concentrated formulations can be dispersed in water, or other liquids, for application, or formulations can be dust-like or granular, which can then be applied without further treatment.
• the formulations can be prepared according to procedures that are conventional in the agricultural chemical art.
• the present invention contemplates all vehicles by which one or more of the compounds can be formulated for delivery and use as a fungicide.
• formulations are applied as aqueous suspensions or emulsions.
• Such suspensions or emulsions are produced from water-soluble, water suspendable, or emulsif ⁇ able formulations which are solids, usually known as wettable powders; or liquids, usually known as emulsif ⁇ able concentrates, aqueous suspensions, or suspension concentrates.
• wettable powders which may be compacted to form water dispersible granules, comprise an intimate mixture of one or more of the compounds of Formula I, an inert carrier and surfactants.
• the concentration of the compound in the wettable powder is usually from about 10 percent to about 90 percent by weight based on the total weight of the wettable powder, more preferably about 25 wt. percent to about 75 wt. percent.
• the compounds can be compounded with any finely divided solid, such as prophyllite, talc, chalk, gypsum, Fuller's earth, bentonite, attapulgite, starch, casein, gluten, montmorillonite clays, diatomaceous earths, purified silicates or the like, hi such operations, the finely divided carrier and surfactants are typically blended with the compound(s) and milled.
• Emulsifiable concentrates of the compounds of Formula I comprise a convenient concentration, such as from about 10 wt. percent to about 50 wt. percent of the compound, in a suitable liquid, based on the total weight of the concentrate.
• the compounds are dissolved in an inert carrier, which is either a water miscible solvent or a mixture of water-immiscible organic solvents, and emulsif ⁇ ers.
• the concentrates may be diluted with water and oil to form spray mixtures in the form of oil-in- water emulsions.
• Useful organic solvents include aromatics, especially the high-boiling naphthalenic and olefinic portions of petroleum such as heavy aromatic naphtha.
• organic solvents may also be used, such as, for example, terpenic solvents, including rosin derivatives, aliphatic ketones, such as cyclohexanone, and complex alcohols, such as 2-ethoxyethanol.
• terpenic solvents including rosin derivatives, aliphatic ketones, such as cyclohexanone, and complex alcohols, such as 2-ethoxyethanol.
• Emulsif ⁇ ers which can be advantageously employed herein can be readily determined by those skilled in the art and include various nonionic, anionic, cationic and amphoteric emulsifiers, or a blend of two or more emulsifiers.
• nonionic emulsifiers useful in preparing the emulsifiable concentrates include the polyalkylene glycol ethers and condensation products of alkyl and aryl phenols, aliphatic alcohols, aliphatic amines or fatty acids with ethylene oxide, propylene oxides such as the ethoxylated alkyl phenols and carboxylic esters solubilized with the polyol or polyoxyalkylene.
• Cationic emulsifiers include quaternary ammonium compounds and fatty amine salts.
• Anionic emulsifiers include the oil-soluble salts (e.g., calcium) of alkylaryl sulphonic acids, oil soluble salts or sulfated polyglycol ethers and appropriate salts of phosphated polyglycol ether.
• oil-soluble salts e.g., calcium
• oil soluble salts or sulfated polyglycol ethers oil soluble salts or sulfated polyglycol ethers and appropriate salts of phosphated polyglycol ether.
• organic liquids which can be employed in preparing the emulsifiable concentrates of the compounds of the present invention are the aromatic liquids such as xylene, propyl benzene fractions; or mixed naphthalene fractions, mineral oils, substituted aromatic organic liquids such as dioctyl phthalate; kerosene; dialkyl amides of various fatty acids, particularly the dimethyl amides of fatty glycols and glycol derivatives such as the n-butyl ether, ethyl ether or methyl ether of diethylene glycol, and the methyl ether of Methylene glycol and the like. Mixtures of two or more organic liquids may also be employed in the preparation of the emulsifiable concentrate.
• aromatic liquids such as xylene, propyl benzene fractions; or mixed naphthalene fractions, mineral oils, substituted aromatic organic liquids such as dioctyl phthalate; kerosene; dialkyl amide
• Preferred organic liquids include xylene, and propyl benzene fractions, with xylene being most preferred.
• Surface- active dispersing agents are typically employed in liquid formulations and in an amount of from 0.1 to 20 percent by weight based on the combined weight of the dispersing agent with one or more of the compounds.
• the formulations can also contain other compatible additives, for example, plant growth regulators and other biologically active compounds used in agriculture.
• Aqueous suspensions comprise suspensions of one or more water- insoluble compounds of Formula I, dispersed in an aqueous vehicle at a concentration in the range from about 5 to about 50 weight percent, based on the total weight of the aqueous suspension.
• Suspensions are prepared by finely grinding one or more of the compounds, and vigorously mixing the ground material into a vehicle comprised of water and surfactants chosen from the same types discussed above.
• Other components such as inorganic salts and synthetic or natural gums, may also be added to increase the density and viscosity of the aqueous vehicle. It is often most effective to grind and mix at the same time by preparing the aqueous mixture and homogenizing it in an implement such as a sand mill, ball mill, or piston-type homogenizer.
• the compounds of Formula I can also be applied as granular formulations, which are particularly useful for applications to the soil.
• Granular formulations usually contain from about 0.5 to about 10 wt. percent, bases on the total weight of the granular formulation of the compound(s), dispersed in an inert carrier which consists entirely or in large part of coarsely divided inert material such as attapulgite, bentonite, diatomite, clay or a similar inexpensive substance.
• Such formulations are usually prepared by dissolving the compounds in a suitable solvent and applying it to a granular carrier which has been preformed to the appropriate particle size, in the range of from about 0.5 to about 3 mm.
• a suitable solvent is a solvent in which the compound is substantially or completely soluble.
• Such formulations may also be prepared by making a dough or paste of the carrier and the compound and solvent, and crushing and drying to obtain the desired granular particle.
• Dusts containing the compounds of Formula I can be prepared by intimately mixing one or more of the compounds in powdered form with a suitable dusty agricultural carrier, such as, for example, kaolin clay, ground volcanic rock, and the like. Dusts can suitably contain from about 1 to about 10 wt. percent of the compounds, based on the total weight of the dust.
• a suitable dusty agricultural carrier such as, for example, kaolin clay, ground volcanic rock, and the like. Dusts can suitably contain from about 1 to about 10 wt. percent of the compounds, based on the total weight of the dust.
• the formulations may additionally contain adjuvant surfactants to enhance deposition, wetting and penetration of the compounds onto the target crop and organism.
• adjuvant surfactants may optionally be employed as a component of the formulation or as a tank mix.
• the amount of adjuvant surfactant will typically vary from 0.01 to 1.0 percent by volume, based on a spray- volume of water, preferably 0.05 to 0.5 volume percent.
• Suitable adjuvant surfactants include, but are not limited to ethoxylated nonyl phenols, ethoxylated synthetic or natural alcohols, salts of the esters or sulphosuccinic acids, ethoxylated organosilicones, ethoxylated fatty amines and blends of surfactants with mineral or vegetable oils.
• the formulations may optionally include combinations that contain other pesticidal compounds.
• additional pesticidal compounds may be fungicides, insecticides, nematocides, miticides, arthropodicides, bactericides or combinations thereof that are compatible with the compounds of the present invention in the medium selected for application, and not antagonistic to the activity of the present compounds.
• the other pesticidal compound is employed as a supplemental toxicant for the same or for a different pesticidal use.
• the compounds of Formula I, and the pesticidal compound in the combination can generally be present in a weight ratio of from 1 : 100 to 100:1.
• the compounds of the present invention can also be combined with other fungicides to form fungicidal mixtures and synergistic mixtures thereof.
• the fungicidal compounds of the present invention are often applied in conjunction with one or more other fungicides to control a wider variety of undesirable diseases.
• the presently claimed compounds can be formulated with the other fungicide(s), tank mixed with the other fungicide(s) or applied sequentially with the other fungicide(s).
• Such other fungicides include 2-(thiocyanatomethylthio)-benzothiazole, 2-phenylphenol, 8- hydroxyquinoline sulfate, antimycin, Ampelomyces, quisqualis, azaconazole, azoxystrobin, Bacillus subtilis, benalaxyl, benomyl, benthiavalicarb-isopropyl, benzylaminobenzene-sulfonate (BABS) salt, bicarbonates, biphenyl, bismerthiazol, bitertanol, blasticidin-S, borax, Bordeaux mixture, boscalid, bromuconazole, bupirimate, calcium polysulfide, captafol, captan, carbendazim, carboxin, carpropamid, carvone, chloroneb, chlorothalonil, chlozolinate, Coniothyrium minitans, copper hydroxide, copper octanoate,
• the compounds of the present invention can be combined with other pesticides, including insecticides, nematocides, miticides, arthropodicides, bactericides or combinations thereof that are compatible with the compounds of the present invention in the medium selected for application, and not antagonistic to the activity of the present compounds to form pesticidal mixtures and synergistic mixtures thereof.
• the fungicidal compounds of the present invention are often applied in conjunction with one or more other pesticides to control a wider variety of undesirable pests.
• the presently claimed compounds can be formulated with the other pesticide(s), tank mixed with the other pesticide(s) or applied sequentially with the other pesticide(s).
• Typical insecticides include, but are not limited to: antibiotic insecticides such as allosamidin and thuringiensin; macrocyclic lactone insecticides such as spinosad; avermectin insecticides such as abamectin, doramectin, emamectin, eprinomectin, ivermectin and selamectin; milbemycin insecticides such as lepimectin, milbemectin, milbemycin oxime and moxidectin; arsenical insecticides such as calcium arsenate, copper acetoarsenite, copper arsenate, lead arsenate, potassium arsenite and sodium arsenite; botanical insecticides such as anabasine, azadirachtin, d-limonene, nicotine, pyrethrins, cinerins, cinerin I, cinerin II, jasmolin I, jasmolin II,
• EMPC ethiofencarb, fenethacarb, fenobucarb, isoprocarb, methiocarb, metolcarb, mexacarbate, promacyl, promecarb, propoxur, trimethacarb, XMC and xylylcarb; dinitrophenol insecticides such as dinex, dinoprop, dinosam and DNOC; fluorine insecticides such as barium hexafluorosilicate, cryolite, sodium fluoride, sodium hexafluorosilicate and sulfluramid; formamidine insecticides such as amitraz, chlordimeform, formetanate and formparanate; fumigant insecticides such as acrylonitrile, carbon disulfide, carbon tetrachloride, chloroform, chloropicrin, para-dichlorobenzene, 1,2-dichloropropane, ethyl formate, ethylene di
• Another embodiment of the present invention is a method for the control or prevention of fungal attack.
• This method comprises applying to the soil, plant, roots, foliage, seed or locus of the fungus, or to a locus in which the infestation is to be prevented (for example applying to cereal or grape plants), a fungicidal effective amount of one or more of the compounds of Formula I.
• the compounds are suitable for treatment of various plants at fungicidal levels, while exhibiting low phytotoxicity.
• the compounds are useful both in a protectant and/or an eradicant fashion.
• the compounds have been found to have significant fungicidal effect particularly for agricultural use. Many of the compounds are particularly effective for use with agricultural crops and horticultural plants. It will be understood by those in the art that the efficacy of the compound for the foregoing fungi establishes the general utility of the compounds as fungicides.
• the compounds have broad ranges of efficacy as fungicides.
• the exact amount of the active material to be applied is dependent not only on the specific active material being applied, but also on the particular action desired, the fungal species to be controlled, and the stage of growth thereof, as well as the part of the plant or other product to be contacted with the compound. Thus, all the compounds, and formulations containing the same, may not be equally effective at similar concentrations or against the same fungal species.
• the compounds are effective in use with plants in a disease-inhibiting and phytologically acceptable amount.
• disease inhibiting and phytologically acceptable amount refers to an amount of a compound that kills or inhibits the plant disease for which control is desired, but is not significantly toxic to the plant. This amount will generally be from about 0.1 to about 1000 ppm (parts per million), with 1 to 500 ppm being preferred.
• concentration of compound required varies with the fungal disease to be controlled, the type of formulation employed, the method of application, the particular plant species, climate conditions, and the like.
• a suitable application rate is typically in the range from about 0.10 to about 4 pounds/acre (about 0.01 to 0.45 grams per square meter, g/m 2 ).
• the compounds of the present invention are generally prepared by one of two methods.
• X Br, Cl, F, of H
• E + electrophile
• the first method is the preferred method. If necessary, further elaboration of the distal ring (E) may be performed
• the coupling steps typically utilize a base in one to four equivalents to facilitate the process and neutralize the acid generated during this step.
• bases include, but are not limited to: pyridine, triethylamine, potassium carbonate, and the like.
• solvents include, but are not limited to: pyridine, dimethyl formamide (DMF), dimethylsulfoxide (DMSO), ethanol, tetrahydrofuran (THF), dichloromethane and the like. In general, the reaction is carried out at temperatures from about 20 to 150°C depending upon the method utilized.
• N',N'-dimethylhydrazide A solution of 6- ⁇ 4-[2-(5-Chlorothieno[2,3-d]pyrimidin-4- ylamino)ethyl]phenoxy ⁇ nicotinic acid (0.5 g, 1.1 mmol) in thionyl chloride (15 niL) was heated at reflux for 1 hour, then cooled and concentrated in vacuo. The residue was taken up in methylene chloride (20 mL) and treated with N,N- dimethylhydrazine. After Ih, the reaction was washed with water (20 mL) and dried (Na 2 SO 4 ). Filtration and removal of solvent left a residue which was recrystallized from ethyl acetate, 0.18 g, 0.44 mol, 35 percent yield.
• Tyramine 700 mg, 5.1 mmol was added to a magnetically stirred suspension of potassium hydride (35 wt. percent dispersion in oil; 876 mg, 7.64 mmol) in DMF (20 mL) at 25°C. After effervescence stopped, tert-butyl 4-fluorobenzoate (1.0 g, 5.1 mmol) was added. After stirring at 25°C for 64 hours, the reaction was warmed to 6O°C. After 48 h, the reaction was poured into brine and extracted with hexanes (3 x 25 mL) and ethyl acetate (2 x 25 mL).
• the reaction mixture was cautiously poured in portions into a rapidly stirred, hot (100 °C) solution of 20 wt. percent aqueous sulfuric acid (330 mL). Stirring was continued for 10 minutes, then the mixture was allowed to cool to room temperature.
• the reaction was washed with methylene chloride (3 x 200 mL), then the pH of aqueous layer was raised to 4-5 (in the cold) with 50 wt percent aq. sodium hydroxide (ca. 160 mL). A precipitate consisting of both a white solid and a reddish brown oil had formed. Additional 20 wt percent aq. sodium hydroxide was added, raising the pH to 6 and resulting in more precipitate/oil formation. The mixture was cooled and filtered, collecting the white solid, while the majority of colored oil remained in the mother liquor. The collected solid was taken up in 5 percent aq.
• the compounds of the present invention have been found to have significant fungicidal effect particularly for agricultural use. Many of the compounds are particularly effective for use with agricultural crops and horticultural plants. In particular, the compounds effectively control a variety of undesirable fungi that infect useful plant crops.
• fungi Activity has been demonstrated for a variety of fungi, including for example the following representative fungi species: Anthracnose of Cucumber ⁇ Collatotrichum lagenarium - COLLLA); Spot Blotch of Wheat (Cochliobolus sativus-COCHSA), Rice blast (Magnaporthe grisea- PYRIOR), Late Blight of Tomato and Potato (Phytophthora infestans - PHYTIN); Brown Rust of Wheat (Puccinia recondita tritici - PUCCRT); Powdery Mildew of Wheat ⁇ Erysiphe graminis - ERYSGT); Powdery Mildew of Cucumber (Eiysiphe cichoracearum - ERYSCI); Leaf Blotch of Wheat (Septoria tritici - SEPTTR); and Glume Blotch of Wheat (Septoria nodorum - LEPTNO). It will be understood by those in the art that the effic
• the activity of the compounds as effective fungicides was determined by applying the compounds to plants and observing control of fungal disease.
• the compounds were formulated at 200 ppm in 10 vol.% acetone plus 90 vol.% Triton X water (deionized water 99.99 wt% + 0.01 wt% Triton XlOO), giving a "formulated test compound.”
• compounds were formulated at 100, 75 or 8.3 ppm rather than 200 ppm in 10 vol. % acetone plus 90 vol. % Triton X water (deionized water 99.99 wt. % + 0.01 wt. % Triton XlOO), giving a
• test compound' The compounds were tested for ability to control 1 plant diseases in a 1-day protectant test (IDP) or a 2-day curative test (2DC).
• IDP 1-day protectant test
• 2DC 2-day curative test
• Formulated test compounds were applied to plants using a turn table sprayer fitted with two opposing air atomization nozzles which delivered approximately 1500 L/ha of spray volume. Plants were inoculated with spores of the fungus the next day (IDP), then incubated in an environment conducive to disease development, hi a few cases, the compounds were tested for ability to control plant disease in a two-day curative test. Plants were inoculated with spores of the fungus two days prior to compound application, and incubated in an environment conducive to disease development both before and after compound application (2DC). For all types of tests, disease severity was evaluated 4 to 28 days later, depending on the speed of disease development. The following experiments were performed in the laboratory to determine the fungicidal efficacy of the compounds of the invention.
• Cucumber Anthracnose (causal agent Colletotricum lagenarium; Bayer code COLLLAV Cucumber plants (variety Bush Champion) were grown from seed in a soil-less peat-based potting mixture (Metromix) until the first true leaf was 20-80% expanded. Each pot contained 1 seedling. These plants were sprayed until wet with the formulated test compound. On the following day, the leaves were inoculated with an aqueous spore suspension of Colletotricum lagenarium and the plants were kept in high humidity for one day to permit spores to germinate and infect the leaf. The plants were then transferred to a growth chamber until disease developed on untreated control plants.
• Cucumber Powdery Mildew (causal agent Ervsiphe cichoracaerum: Bayer code ERYSCI " ) : Cucumber plants (variety Bush Champion) were grown from seed in a soil-less peat-based potting mixture (Metromix) until the first true leaf was 20-80% expanded. Each pot contained 1 seedling. These plants were sprayed until wet with the formulated test compound. On the following day, the leaves were inoculated with an aqueous spore suspension of powdery mildew spores (approximately 50,000 spores per milliliter). The plants were then incubated in a greenhouse until disease developed on untreated control plants. Glume Blotch of Wheat (causal agent Leptosphaeria nodorum -
• Stasnospora nodorum Baver code LEPTNO
• Wheat plants (variety Yuma) were grown from seed in a 50% pasteurized soil/50% soil-less mix until the seedlings had a fully expanded first leaf. Each pot contained 3-20 seedlings. These plants were sprayed until wet with the formulated test compound. On the following day, (or two days before application for a two-day curative test), the leaves were inoculated with an aqueous spore suspension of Leptosphaeria nodorum and the plants were kept in high humidity (one day in a dark dew chamber followed by four to seven days in a lighted dew chamber) to permit spores to germinate and infect the leaf. The plants were then transferred to a greenhouse until disease developed on untreated control plants.
• Tomato Late Blight (causal agent Phvtophthora infestans; Baver code PHYTIN): Tomato plants (variety Outdoor Girl or Rutgers) were grown from seed in a soil-less peat-based potting mixture (Metromix) until the second true leaf was 30-100% expanded. Each pot contained 1 seedling. These plants were sprayed until wet with the formulated test compound. On the following day, the leaves were inoculated with an aqueous suspension of Phytophthora infestans sporangia and zoospores, and the plants were kept in high humidity for one day to permit sporangia and zoospores to germinate and infect the leaf. The plants were then transferred to a growth chamber until disease developed on untreated control plants.
• Speckled Leaf Blotch of Wheat (Mvcosphaerella sraminicola - Septoria tritici: Bayer code SEPTTR): Wheat plants (variety Monon or Yuma) were grown from seed in a greenhouse in 50% pasteurized soil/50% soil-less mix until the first true leaf was fully expanded, with 3-8 seedlings per pot. These plants were sprayed until wet with the formulated test compound.
• the leaves were inoculated with an aqueous spore suspension of Septoria tritici and the plants were kept in high humidity (one day in a dark dew chamber followed by four to seven days in a lighted dew chamber) to permit spores to germinate and infect the leaf.
• the plants were then transferred to a greenhouse until disease developed on untreated control plants.
• the following table presents the activity of typical compounds of the present invention when evaluated in these experiments.
• the effectiveness of the test compounds in controlling disease was determined by assessing the severity of disease on treated plants, then converting the severity to percent control based on the level of disease on untreated, inoculated plants.

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