| Rhizoctonia damping-off, blight and rot |
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| Rhizoctonia solani J.G. Kühn | |
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Taxonomic Rank: Agaricomycetes: Agaricales: Corticiaceae |
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| Synonym(s): white blight, target spot, Rhizoctonia aerial blight, Rhizoctonia damping-off and fruit rot, target spot or sore shin of tobacco, Rhizoctonia brown patch, Rhizoctonia root rot, wirestem, Rice sheath blight |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; cause of aerial potato tubers Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Structure; Light micrograph of hyphae of the fungus Rhizoctonia solani. Right angle branching, a slight constriction at the base of the branch and cross walls (septa) near the branch are all diagnostic features of R. solani hyphae. February 1987 Gerald Holmes, Valent USA Corporation, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Wilted and discolored infected seedlings. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Loss of lower foliage on infected seedlings. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Foliage discoloration and loss on infected seedling. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Infection centers in beds Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Infection center in bed. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Development ; Infections occur on seedlings in sandy soils as sand, washed by rain and irrigation ("sand splash"), accumulates at the base of the seedlings, creating a microenvironment of reduced aeration and increased relative humidity which favors infection. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Infections occur on seedlings in sandy soils as sand, washed by rain and irrigation ("sand splash"), accumulates at the base of the seedlings, creating a microenvironment of reduced aeration and increased relative humidity which favors infection. Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Irregular tan blotches on leaf blades Paul Vincelli, University of Kentucky, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Irregular tan blotches on leaf blades Paul Vincelli, University of Kentucky, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Irregular tan blotches on leaf blades Paul Vincelli, University of Kentucky, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Irregular tan blotches on leaf blades. Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Tan/brown leaf spots with spore-producing bodies ("pycnidia") within the spots Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Department of Plant Pathology Archive, North Carolina State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Department of Plant Pathology Archive, North Carolina State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Department of Plant Pathology Archive, North Carolina State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Post-emergence dying of cotton seedlings. The fungi Pythium and Fusarium cause similar damage to seedlings. Clemson University - USDA Cooperative Extension Slide Series, , Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; lesion on hypocotyl field Daren Mueller, Iowa State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; This soil-borne fungus infects the lower stem of the tobacco plant. Symptoms begin on seedlings and transplants as a dark brown lesion on the stem near or below ground level. Lesions vary in size and number depending on environmental conditions. In wet, cool weather, the lesions may enlarge upward and around the stem until the plant falls over. This may be confused with black shank or Pythium damping-off. On older plants, a dark brown lesion up to several inches long occurs at or near the soil line. It may girdle the stalk which becomes hard and brittle. The stalk may break at this lesion. The plant may be stunted with yellow to brown and/or wilted leaves. Roots usually show no evidence of decay. R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; This soil-borne fungus infects the lower stem of the tobacco plant. Symptoms begin on seedlings and transplants as a dark brown lesion on the stem near or below ground level. Lesions vary in size and number depending on environmental conditions. In wet, cool weather, the lesions may enlarge upward and around the stem until the plant falls over. This may be confused with black shank or Pythium damping-off. On older plants, a dark brown lesion up to several inches long occurs at or near the soil line. It may girdle the stalk which becomes hard and brittle. The stalk may break at this lesion. The plant may be stunted with yellow to brown and/or wilted leaves. Roots usually show no evidence of decay. R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Paul Bertrand, University of Georgia, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Paul Bertrand, University of Georgia, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Paul Bertrand, University of Georgia, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Sign; Mycelia of Rhizoctonia solani growing out infected leaf tissue Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org Additional Resolutions & Image Usage |
 Sign; Mycelia of Rhizoctonia solani growing out infected leaf tissue Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org Additional Resolutions & Image Usage |
 Sign; Mycelia of Rhizoctonia solani growing out infected leaf tissue Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Barb Corwin, Turfgrass Diagnostics, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Florida Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Rhizoctonia root rot (bare patch) Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Glyphosate application April 16 Planted April 17, 2008 Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Glyphosate application April 16 Planted April 17, 2008 Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Glyphosate application April 16 Planted April 17, 2008 Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Glyphosate application April 16 Planted April 17, 2008 Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; On dewy mornings, the brown patch pathogen produces mycelium. In low-cut turf it is often in a "smoke ring" around the patch. This is fairway-height (approximately 1/2 inch) turfgrass. Megan Kennelly, Kansas State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Close-up view of symptoms of sheath blight (Rhizoctonia solani) on a rice stalk. William M. Brown Jr., , Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Field view of severe early upper rice leaf infection symptoms of rice sheath blight Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Field view of severe late upper leaf infection symptoms of rice sheath blight Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Water soaked initial rice sheath blight lesion symptoms on rice stems Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Sign; Rice sheath blight symptoms (snake skin appearance) and signs (black sclerotia) on a rice leaf Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Variation of early Rice sheath blight symptoms on rice stems- from left to right- water soaked lesion, dark resistance reaction or fungicide application lesion, and dried lesions Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Snake skin like Rice sheath blight symptoms on rice leaves Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Snake skin like Rice sheath blight symptoms on rice stems Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Sign; Rice sheath blight symptoms and pathogen signs (sclerotia) on rice head Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Field view of shealth blight resistant and susceptible lines. Donald Groth, Louisiana State University AgCenter, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Rhizoctonia solani AG1 lesions on rice sheat Yuan-Min Shen, Taichung District Agricultural Research and Extension Station, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Rhizoctonia root rot (bare patch), Spear tipping due to Rhizoctonia root rot Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Spear-tipping symptom caused by rhizoctonia root rot (bare patch) Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
 Symptoms; Spear-tipping symptom caused by rhizoctonia root rot (bare patch) Mary Burrows, Montana State University, Bugwood.org Additional Resolutions & Image Usage |
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Developed by The University of Georgia - Center for Invasive Species and Ecosystem Health. Last updated on Wednesday, May 15, 2013 at 09:10 AM |
