Root rots
Beans are attacked by different pathogens. Rhizoctonia root rot results in seed rot, damping-off, stem canker, and root and pod rot. Fungicide applications are suggested as control measures. Fusarium root rot appears as reddish lesions or streaks on the hypocotyl and primary root. Fusarium yellows o...
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| Format: | Book Chapter |
| Language: | Inglés |
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International Center for Tropical Agriculture
1989
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| Online Access: | https://hdl.handle.net/10568/81819 |
| _version_ | 1855539805267427328 |
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| author | Abawi, G.S. |
| author_browse | Abawi, G.S. |
| author_facet | Abawi, G.S. |
| author_sort | Abawi, G.S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Beans are attacked by different pathogens. Rhizoctonia root rot results in seed rot, damping-off, stem canker, and root and pod rot. Fungicide applications are suggested as control measures. Fusarium root rot appears as reddish lesions or streaks on the hypocotyl and primary root. Fusarium yellows occurs on the roots and hypocotyls, usually at wound sites. Initial symptoms appear on lower leaves, which exhibit yellowing and wilting, becoming stronger and progressing upward to younger leaves. Control measures include crop rotation and chemical seed treatment. Pythium root rot is caused by various species of Pythium (P. ultimum, P. irregulare, P. aphanidermatum, and P. myriotylum). It can infect germinating seed, cotyledons, terminal buds, radicle, and hypocotyl tissue. Southern blight produces damping-off, stem blight, and root rot. Control can be achieved by selecting fields with low soil acidity and good drainage, wide plant spacing, lime, and crop rotation. Black root rot infects the hypocotyl. Numerous elongated lesions are produced on the stem and root tissues, resulting in plant stunting, premature defoliation, and eventual plant death. Texas root rot or Phymatotrichum root rot infects under-ground plant parts. Aboveground symptoms are stunting and sudden wilting at blossom initiation. Plants with Aphanomyces root-and-hypocotyl rot are stunted, clorotic, and suffer premature defoliation. Control measures for most of these diseases include proper cultural practices, use of chemicals, and resistant var. Color illustrations are given of the symptoms and damage caused by the diseases. (CIAT) |
| format | Book Chapter |
| id | CGSpace81819 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1989 |
| publishDateRange | 1989 |
| publishDateSort | 1989 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace818192025-11-05T17:07:33Z Root rots Abawi, G.S. phaseolus vulgaris rhizoctonia solani fusarium solani phaseoli fusarium oxysporum phaseoli pythium ultimum pythium irregulare pythium aphanidermatum sclerotium rolfsii thielaviopsis basicola phymatotrichum omnivorum mycoses etiology epidemiology symptomat developmental stages diseases and pathogens plant anatomy seedling micosis etiologia epidemiologia sintoma Beans are attacked by different pathogens. Rhizoctonia root rot results in seed rot, damping-off, stem canker, and root and pod rot. Fungicide applications are suggested as control measures. Fusarium root rot appears as reddish lesions or streaks on the hypocotyl and primary root. Fusarium yellows occurs on the roots and hypocotyls, usually at wound sites. Initial symptoms appear on lower leaves, which exhibit yellowing and wilting, becoming stronger and progressing upward to younger leaves. Control measures include crop rotation and chemical seed treatment. Pythium root rot is caused by various species of Pythium (P. ultimum, P. irregulare, P. aphanidermatum, and P. myriotylum). It can infect germinating seed, cotyledons, terminal buds, radicle, and hypocotyl tissue. Southern blight produces damping-off, stem blight, and root rot. Control can be achieved by selecting fields with low soil acidity and good drainage, wide plant spacing, lime, and crop rotation. Black root rot infects the hypocotyl. Numerous elongated lesions are produced on the stem and root tissues, resulting in plant stunting, premature defoliation, and eventual plant death. Texas root rot or Phymatotrichum root rot infects under-ground plant parts. Aboveground symptoms are stunting and sudden wilting at blossom initiation. Plants with Aphanomyces root-and-hypocotyl rot are stunted, clorotic, and suffer premature defoliation. Control measures for most of these diseases include proper cultural practices, use of chemicals, and resistant var. Color illustrations are given of the symptoms and damage caused by the diseases. (CIAT) El frijol es atacado por varios patogenos. La pudricion radical produce podredumbre del pie, chancro del tallo y pudricion radical y de la vaina. La pudricion seca de las raices aparece como lesiones rojizas en el hipocotilo y en la raiz primaria. El amarillamiento ocurre en las raices e hipocotilos, generalmente donde hay lesiones. Los sintomas iniciales aparecen en las hojas inferiores, las cuales muestran amarillamiento y marchitamiento, y se hacen mas pronunciados desplazandose hacia las hojas mas jovenes. Se controla con practicas culturales y tratamiento quimico de la semilla. La pudricion radical por varias especies de Pythium puede infectar la semilla en germinacion, los cotiledones, las yemas terminales, la radicula y el tejido del hipocotilo. El anublo sureno produce podredumbre del pie, anublo del tallo y pudricion radical. La pudricion negra de la raiz infecta el hipocotilo produciendo atrofiamiento, defoliacion prematura y muerte. La pudricion texana de la raiz o marchitamiento por Phymatotrichum omnivorum infecta las partes subterraneas de las plantas. Los sintomas en las partes aereas incluyen atrofiamiento y marchitamiento subito a la iniciacion de la florescencia. La pudricion por Aphanomyces y la pudricion del hipocotilo causan atrofia, clorosis y defoliacion prematura en las plantas severamente afectadas. Estas enfermedades se controlan con practicas culturales adecuadas, uso de quimicos y de var. resistentes. Se presentan ilustraciones a color de los sintomas y danos causados por las enfermedades. (CIAT) 1989 2017-06-20T08:59:30Z 2017-06-20T08:59:30Z Book Chapter https://hdl.handle.net/10568/81819 en Open Access application/pdf International Center for Tropical Agriculture Abawi, G.S.1989. Root rots . 2. ed . In: Schwartz, H.F.; Pastor-Corrales, M.A. (eds.). Bean production problems in the tropics . Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 105-157. |
| spellingShingle | phaseolus vulgaris rhizoctonia solani fusarium solani phaseoli fusarium oxysporum phaseoli pythium ultimum pythium irregulare pythium aphanidermatum sclerotium rolfsii thielaviopsis basicola phymatotrichum omnivorum mycoses etiology epidemiology symptomat developmental stages diseases and pathogens plant anatomy seedling micosis etiologia epidemiologia sintoma Abawi, G.S. Root rots |
| title | Root rots |
| title_full | Root rots |
| title_fullStr | Root rots |
| title_full_unstemmed | Root rots |
| title_short | Root rots |
| title_sort | root rots |
| topic | phaseolus vulgaris rhizoctonia solani fusarium solani phaseoli fusarium oxysporum phaseoli pythium ultimum pythium irregulare pythium aphanidermatum sclerotium rolfsii thielaviopsis basicola phymatotrichum omnivorum mycoses etiology epidemiology symptomat developmental stages diseases and pathogens plant anatomy seedling micosis etiologia epidemiologia sintoma |
| url | https://hdl.handle.net/10568/81819 |
| work_keys_str_mv | AT abawigs rootrots |