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Ohio State University Extension


Plant Pathology

Title (Click to Sort) Fact Sheet Number Tags
Ripe Rot of Grape PLPATH-FRU-0052 grape, disease, fungi, ripe rot
Wine Grape Cultivars for the Midwest ANR-0138 grape, cultivar, midwest, winter hardiness, fruit ripening, vinifera, hybrids
Chestnut Anthracnose PLPATH-FRU-0051 chestnut, disease, anthracnose, ohio, tree, pathology, fruit
Sour Rot Disorder of Grape PLPATH-FRU-50 grape, sour rot, fruit flies
Cedar-Apple Rust PLPATH-TREE-10 cedar, apple, gymnosporangium juniperi-virginianae, rust disease
Soybean Cyst Nematode PLPATH-SOY-5 soybean, scn, cyst, nematode, scn prevention, scn symptoms, yellow soybeans, nematodes, scn damage
Phytophthora Damping-off and Root Rot of Soybean PLPATH-SOY-04 soybeans, stem rot, disease cycle, mold, damping-off, seed treatment, phytophthora root rot, soybean, rps genes, single dominant resistance genes
Beech Bark Disease PLPATH-TREE-09 beech tree, beech bark disease, diseased beech tree, beech scale, beech tree fungus, beech tree cankers
Hops Downy Mildew PLPATH-FRU-49 hops, downy mildew, disease
Downy Mildew of Blackberry PLPATH-FRU-48 blackberry, downy mildew, disease, symptoms, infection, fungicides
Identification and Management of Soilborne Diseases of Tomato HYG-3314 tomato, soilborne disease, wilt, root rot, stunted tomato plants, corky root rot, black dot root rot, root knot nematodes, tomato plants dying
Anaerobic Soil Disinfestation for Management of Soilborne Diseases in Midwestern Vegetable Production HYG-3315 tomato, soilborne disease, anaerobic soil disinfestation, wilt, root rot
Grape Black Rot PLPATH-FRU-24 black rot, grape, grape disease, grape plant fungus, black rot chemical control
Melampsora Rust PLPATH-TREE-08 melampsora rust, poplars, tree diseases
Orange Rust of Brambles PLPATH-FRU-30 orange rust, brambles, fungicides for raspberry plants, black raspberry disease, purple raspberry disease, orange powder on leaves
Soybean Rust PLPATH-SOY-2 soybeans, rust, plant disease, kudzu, symptoms, management, disease, fungicide
Sclerotinia Stem Rot (White Mold) of Soybean PLPATH-SOY-3 sclerotinia stem rot, soybeans, disease cycle, disease management, tillage, biological control, herbicides, fungicides, chemical control, crop rotation, white mold, fungus
Viral Diseases of Plants PLPATH-GEN-5 home, yard and garden, plant disease, viral diseases of plants, viral plant diseases
20 Questions on Plant Diagnosis PLPATH-GEN-3 home, yard and garden, plant disease, plant pathology diagnosis, plant health management
Diagnosing Sick Plants PLPATH-GEN-2 diagnosing plant diseases, plant disease series, plant pathogens versus insects, questions for diagnosing a sick plant
Sanitation and Phytosanitation (SPS) PLPATH-GEN-10 home, yard and garden, plant disease, quarantine pathogens, u.s. national plant diagnostic network, national plant protection organization, international standards for phytosanitary measures, international plant protection, world animal health organization, codex alimentarius commission, epizoonotics, sanitary and phytosanitary measures, world trade organization agreement
Parasitic Higher Plants PLPATH-GEN-9 parasitic plants, dwarf mistletoe, dodder, broomrape, alfalfa parasite plants, lespedeza parasite plants, clover parasite plants, flax parasite plants, sugar beets parasite plants, potato parasite plants, vegetable parasite plants
Rhizoctonia Damping-off and Root Rot of Soybeans PLPATH-SOY-1 soybeans
Lichens PLPATH-GEN-12 lichens, foliose lichens, fruticose lichens, crustose lichens, squamulose lichens
Plants Get Sick Too! PLPATH-GEN-1 home, yard and garden, plant disease, plant pathology, plant health, plant injury
Fungal and Fungal-like Diseases of Plants PLPATH-GEN-7 home, yard and garden, plant disease, fungal and fungal-like diseases of plants, plant pathology
Bacterial Diseases of Plants PLPATH-GEN-6 home, yard and garden, plant disease, bacterial diseases of plants, plant bacteria, bacterial plant diseases
Nematode Diseases of Plants PLPATH-GEN-8 home, yard and garden, plant disease, nematode diseases of plants, nematodes, nematode plant diseases
Keeping Plants Healthy PLPATH-GEN-4 home, yard and garden, plant disease
Food Safety in Gardens HYG-1153 food safety, garden, reduce contamination, tool sanitation, drip irrigation, trickle irrigation, animal compost, soil amendments, organic gardening, reduce stress, improve health
Food Safety and Garden Flooding HYG-1154 food safety, flooding, garden, floodwater, heavy rain, vomiting, stomach cramps, diarrhea, human pathogens, foodborne pathogens, norovirus, salmonella, pathogenic e. coli, hepatitis a, giardia, cryptosporidium
Bitter Rot of Apple PLPATH-FRU-20 bitter rot, apple, apple disease, rotten spots on apples, rotten apples, controlling bitter rot on apples
Fire Blight of Apples and Pears PLPATH-FRU-22 apple, pear, fire blight, erwinia, apple bacteria, pear bacteria
Blueberry Leaf Rust PLPATH-FRU-43 blueberry, blueberry rust, disease symptoms, treatment, blueberry leaf rust, yellow spots on blueberry leaves, fungus, pucciniastrum vaccinia, aeciospores
Scab of Apple PLPATH-FRU-23 apple, scab, venturia inaequalis, disease
Leather Rot of Strawberry PLPATH-FRU-09 strawberries, leather rot, controlling leather rot, leather rot fungicides, infected strawberries, brown strawberries, leathery strawberries, strawberry fungus, white mold on strawberries
Rusts of Apple PLPATH-FRU-02 apple, rust diseases, control, fungicide spray, cedar quince rust, cedar hawthorn rust, cedar apple rust, fungus, crabapple, defoliated
Barley Yellow Dwarf of Wheat, Oats, and Barley PLPATH-CER-01 wheat, oats, barley, barley yellow dwarf
Oak Wilt PLPATH-TREE-02 oak, oak wilt, oak tree disease, oak tree fungus, oak infection, treating oak wilt disease, nitidulid beetles
Dutch Elm Disease PLPATH-TREE-04 elm, dutch elm disease, insecticides for dutch elm disease, american elm tree fungal pathogen, treating dutch elm disease, managing dutch elm disease, elm bark beetles, bark beetle larvae
Sudden Oak Death (aka Ramorum blight) PLPATH-TREE-05 oak, sudden oak death, ramorum blight, symptoms, pathogen, prevention, management, stem cankers, twig dieback, leaf blight
Diplodia Tip Blight of Two-Needled Pines PLPATH-TREE-03 pine trees, diplodia tip blight, pine tree disease, infected pine tree, pine tree fungus, dead pine needles, pine branches dying
Cherry Leaf Spot PLPATH-FRU-40 cherry, leaf spot, cherry leaf infection, cherry tree leaves turning yellow, cherry tree fungus
Scab of Peach, Nectarine, Plum, and Apricot PLPATH-FRU-39 scab, fungus, peach, nectarine, plum, apricot, symptoms, blotches, infected fruit, fungicide
Bacterial Spot of Stone Fruits PLPATH-FRU-38 bacterial spot, bacterial, black spots, peaches, nectarines, apricots, plums, prunes, cherries, defoliation, holes in leaves
Powdery Mildew of Grape PLPATH-FRU-37 powdery mildew, grape, grape fungus, grape disease, grape infection
Botrytis Fruit Rot “Gray Mold” of Strawberry, Raspberry, and Blackberry PLPATH-FRU-36 botrytis fruit rot, gray mold, fungicides, controlling gray mold, strawberry, raspberry, blackberry, fruit infection, fruit disease
Strawberry Leaf Diseases PLPATH-FRU-35 strawberry, leaf diseases, leaf scorch, leaf spot, leaf blight, ohio strawberry leaf diseases
Red Stele Root Rot of Strawberry PLPATH-FRU-34 red stele root rot, strawberry, treating infected strawberry plants, infected strawberry plants, infected strawberry roots, strawberry fungus
Downy Mildew of Grape PLPATH-FRU-33 downy mildew, grape
Black Knot of Plums and Cherries PLPATH-FRU-31 black knot, plums, cherries, black knot fungus, ohio plum and cherry tree disease, apiosporina morbosa
Brown Rot of Stone Fruits PLPATH-FRU-29 brown rot, stone fruits, peach disease, cherry disease, fruit fungus
Spur Blight of Red Raspberries PLPATH-FRU-28 spur blight, red raspberries, lesions, raspberries, disease cycle, fungus, symptoms, control, treatment, fungicides
Anthracnose of Raspberry and Blackberry PLPATH-FRU-27 anthracnose, raspberries, blackberries, brambles, fungus, cane fruits, cane spot, gray bark, blackberry plant disease, raspberry plant disease
Peach Canker PLPATH-FRU-25 peach, canker, controlling peach canker, apricot, prune, plum tree, canker symptoms, sweet cherry tree, fungus, disease, infection
Apple Powdery Mildew PLPATH-FRU-21 apple, powdery mildew
Bacterial Crown Gall of Fruit Crops PLPATH-FRU-19 bacterial crown gall, fruit, fruit crop disease in ohio, crown gall bacterium
Phomopsis Leaf Blight and Fruit Rot of Strawberry PLPATH-FRU-18 phomopsis leaf blight, fruit rot, strawberry, leaf lesions, leaf spot disease, strawberry fungus, strawberry disease management, soft rot
Late Leaf Rust of Red Raspberries PLPATH-FRU-17 late leaf rust, red raspberries
Anthracnose of Strawberry PLPATH-FRU-16 anthracnose, strawberry, strawberry fungus, strawberry plant fungicide, strawberry disease management, rotten strawberries, strawberry disease
Anthracnose of Grape PLPATH-FRU-15 anthracnose, grape, grape vineyard fungicide, grape cane lesions, vidal disease, reliance disease, vineyard fungus
Phytophthora Root Rot of Raspberry PLPATH-FRU-14 phytophthora root rot, raspberry, fungicide, red raspberry disease, black raspberry disease, purple raspberries
X-Disease (Mycoplasma disease of peaches and nectarines) PLPATH-FRU-13 x-disease, mycoplasma disease, virus, chokecherries, leafhopper, cherry trees, peaches, nectarines, disease, leaf symptoms
Eutypa Dieback of Grape PLPATH-FRU-11 eutypa dieback, grape, dead arm, fungus, dead-arm disease, symptoms, control, phomopsis, cane, leaf spot
Cane Blight of Raspberries PLPATH-FRU-10 raspberry, cane blight, fungus, disease cycle, brown cankered bark, black, red, purple, dewberries
Black Rot and Frogeye Leaf Spot of Apple PLPATH-FRU-07 black rot, frogeye leaf spot, apple, crabapple, disease, shriveled black apples, botryosphaeria obtusa, jonathan apples, winesap apples
Mycorrhizae in Urban Landscapes PLPATH-TREE-01 trees, mycorrhizae
Verticillium Wilt of Strawberry PLPATH-FRU-32 verticillium wilt, strawberry, verticillium wilt fungus, infected strawberry plants, strawberry disease, treating strawberry plants
Thousand Cankers Disease PLPATH-TREE-07 walnut trees, symptoms, causal agents, disease management, conidia, cankers, thousand cankers disease, invasives, mortality, walnut twig beetle, fungus
Peach Leaf Curl PLPATH-FRU-26 leaf curl, peach, peach leaf curl, diseased peach and nectarine trees, red warts on peaches, peach fungus, controlling peach leaf curl
Bitter Rot of Grape PLPATH-FRU-08 grape, bitter rot
Necrotic Leaf Blotch of Golden Delicious Apples PLPATH-FRU-12 necrotic leaf blotch, apples, golden delicious necrotic leaf blotch, golden delicious fungicides, golden delicious leaf blotching, golden delicious leaf disease, golden delicious leaf loss
Sooty Blotch and Fly Speck of Apple PLPATH-FRU-41 sooty blotch, fly speck, apple, apple fungus, golden delicious apple disease, grimes apple disease, sooty blotch fungus
White Rot and Botryosphaeria Canker of Apple PLPATH-FRU-42 white rot, botryosphaeria canker, infection, fungicides, apple tree fungus, apple tree blisters, apple, bot rot, fruit rot, symptoms, apple disease
Phytophthora Root and Crown Rot of Fruit Trees PLPATH-FRU-06 phytophthora root rot, crown rot, apple, cherry, peach, phytophthora root and crown rot of fruit trees, ohio apple, and peach tree disease, soil fungi
Black Root Rot of Strawberry PLPATH-FRU-05 black root rot, strawberry
Verticillium Wilt of Raspberry PLPATH-FRU-04 verticillium wilt, raspberry, black raspberry disease, red raspberry disease, raspberry fungus
Botrytis Bunch Rot or Gray Mold of Grape PLPATH-FRU-03 botrytis bunch rot, gray mold, grape, infected grapes, shriveled grapes, brown grapes, diseased grapes, controlling grape fungus
Cork Spot and Bitter Pit of Apples PLPATH-FRU-01 apples, cork, spot, bitter pit, jonathan, symptoms, jonathan spot treatment, treating bitter pit, treating cork spot, bitter pit symptoms, york imperial cork spot, delicious cork spot, golden delicious cork spot
Rust Diseases of Wheat PLPATH-CER-12 wheat, rust diseases, rust diseases of wheat, rust fungi, leaf stripe, stem rust
Powdery Mildew of Wheat PLPATH-CER-11 wheat, powdery mildew, powdery mildew of wheat, wheat disease
Northern Corn Leaf Blight PLPATH-CER-10 corn, northern corn leaf blight
Maize Dwarf Mosaic of Maize PLPATH-CER-09 corn, mdmv, maize dwarf mosaic, virus, sugarcane mosaic, disease, chlorosis, chlorotic spots, infected, root rot
Maize Chlorotic Dwarf of Maize PLPATH-CER-08 corn, maize, maize chlorotic dwarf, mcdv, plant stunting, field corn, johnsongrass
Leaf Blotch Diseases of Wheat—Septoria tritici Blotch, Stagonospora nodorum Blotch and Tan Spot PLPATH-CER-07 wheat, leaf blotch, septoria blotch, tab spot, speckled leaf spot, wheat disease, fungicide application
Fusarium Head Blight or Head Scab of Wheat, Barley and other Small Grain Crops PLPATH-CER-06 wheat, barley, small grains, diseased wheat, wheat fungus, fusarium head blight, head scab, fusarium head blight or head scab of wheat, barley and other small grain crops
Gray Leaf Spot of Corn PLPATH-CER-05 corn, gray leaf spot, disease, fungus, stalk rot, lodging, conidia, epidemiology, infection
Gibberella Ear Rot and Mycotoxins in Corn: Sampling, Testing, and Storage PLPATH-CER-04 corn, gibberella ear rot, mycotoxins, vomitoxin, fungus, stalk rot, pink white mold
Fusarium Head Blight Forecasting System PLPATH-CER-03 wheat, fusarium head blight, scab, fungicide, wheat scab, vomitoxin, head scab, corn, soybean, disease
Common Rust of Corn PLPATH-CER-02 corn, common rust of corn, common corn rust, corn fungus, corn disease, ohio corn rust disease cycle
Botrytis Gray Mold in Greenhouse Floral Crops HYG-3070 home, yard and garden, plant disease, flowers
Wild Mushrooms PLPATH-GEN-11 home, yard and garden, plant disease, hyg-3303, wild mushrooms, ohio mushrooms, edible mushrooms, mushrooms
Summer Patch on Turfgrass HYG-3082 plant disease, lawn and turf, turfgrass, prevention, fungicides, symptoms, patch disease, necrotic ring spot, take-all patch, bentgrass dead spot, bermudagrass decline, summer patch, take all patch, spring dead spot, fungi, eri
Pruning and Care of Tree Wounds PLPATH-TREE-06 trees, pruning, wounds, caring for tree wounds, preventing tree wounds, maintaining tree health, pruning tree branches, callus formation, how to prune
Phomopsis Twig Blight of Blueberry PLPATH-FRU-45 home, yard and garden, plant disease, fruit, twig fungus, phomopsis twig blight, canker disease of blueberries, infected twigs, brown lesions on twig, fruit rot, fusicoccum canker, leaf spots, lime sulfur, overripe fruit
Fruit Rots of Blueberry: Alternaria, Anthracnose, and Botrytis PLPATH-FRU-44 plant disease, fruit, rot symptoms, anthracnose, botrytis, botrytis mycelium, alternaria rot, alternaria tenuissima, botrytis cinerea, overripe, preharvest, postharvest, disease
Angular Leaf Spot of Strawberry (Bacterial Blight) HYG-3212 plant disease, strawberry, angular leaf spot, symptoms, disease, control, copper fungicide, bactericide, allstar, annapolis, cavendish, honeoye, kent
Phomopsis Cane and Leaf Spot of Grape PLPATH-FRU-47 home, yard and garden, plant disease, fruit, phomopsis cane and leaf spot of grape, ohio vineyard disease, vineyard grape vine infection, infected grape cluster stems, infected berries, fruit rot, grape rot
Mummy Berry of Blueberry PLPATH-FRU-46 home, yard and garden, plant disease, fruit, infected blueberries, mummy berry disease, berry fungus, monilinia vaccinii-corymbosi, spongy white fungal growth
Brown Spot of Soybeans AC-18 agronomic crops, septoria leaf spot, brown spot, yellow spots, soybean fungus, infected soybean, septoria glycines
Sudden Death Syndrome of Soybean AC-44 agronomic crops, soybean sudden death, sds soybean symptoms, scn infestation, fusarium virguliforme, soybean in cold climate, crop disease
Frogeye Leaf Spot of Soybean AC-53 agronomic crops, frogeye leaf spot, soybeans, ohio, cercospora sojina, disease cycle, fungus, brown spots on leaves, holes in leaves, frogeye lesions
Inoculants and Soil Amendments for Organic Growers SAG-17 sustainable agriculture, organic agriculture, biopesticides, biofertilizers, green manures, mycorrhizae, organic fertilizer, organic materials review institute, usda national organic program, improving crop productivity, organic certified, organic foods production act
Collecting and Submitting a Turfgrass Sample to the Plant and Pest Diagnostic Clinic HYG-3087 plant disease, lawn, turf, disease, turfgrass, plant pathology, c wayne ellett plant and pest diagnostic clinic, grass testing, plant, pest, diagnostic clinic
Dollar Spot on Turfgrass HYG-3075 kentucky bluegrass, infected grass, prolonged wet foliage, plant disease, lawn and turf, dollar spot, bluegrass, turfgrass, symptoms, chemical control, yellow spots on grass blades
Slime Molds on Turfgrass HYG-3074 plant disease, lawn and turf, causal organism, primitive fungi, weedy grass, infestation, slime molds on turf grass
Powdery Mildew on Turfgrass HYG-3081 home, yard and garden, kentucky bluegrass, erysiphe graminis, mildew fungi, plant disease, lawn and turf, powdery mildew on turf, turf fungus, chemical control of powdery mildew, fungal growth
Gray Leaf Spot on Turfgrass HYG-3083 genetic host resistance, p. grisea, chemical control, gray spot, st. augustine grass, plant disease, lawn and turf, gray leaf spot on turf grass, grass fungus, gray spot symptoms, turf fungus
Brown Patch on Turfgrass HYG-3084 brown patch, white mycelia, rhizoctonia solani, grass lesions, chemical control, cultural practices, genetic host resistance, plant disease, lawn and turf, lesions on turfgrass, turf disease, round patches on turf, brown patch on turf, brown path fungus on lawn, fungicide, infected turfgrass
White Pine Blister Rust on Currants and Gooseberries HYG-3205 home, yard and garden, plant disease, black currants, red currants, infected plants, ribes bushes, pinus strobus, currants, gooseberries, white pine blister rust
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