Foliar diseases of the rubber tree (Hevea brasiliensis Muell. Arg.) planted on a clonal garden at the Middle Magdalena region of the Department of Santander (Colombia)
Fungal foliar diseases are considered the major cause of yield decline in rubber tree producing countries. Thus, this study assessed incidence and severity in the Clones FX 3864, IAN 710, PB 217, PB 260, PB 235, PB 314, rich man 110, RRIM 703, RRIM 600 established in a clonal garden in the Middle Magdalena region of the Department of Santander (Colombia). Five surveys conducted between August 2009 and March 2010, determined the fungal pathogen incidence and severity on leaves at stage B and D, respectively. Foliar tissue of assessed clones showed incidence of Colletotrichum, Fusarium, Dreschlera, Microcyclus ulei genera and rusts. Diseases caused by these potential pathogens occurred severely in the RRIM 703 and FX 3864 clones with 51% and 64% respectively. In contrast, diseases were less severe in IAN 710, PB 314 and RRIC 110 clones with values between 3% and 7%. Within the results observed, several potential crop fungi pathogens were found, which require a deeper understanding of their attack and interactions with the host and regional climatic conditions. Furthermore, the correlation of incidence and severity with temperature and humidity data at short time intervals should be determined. This will allow the prediction of the weather conditions and periods that bring on the infection process and the development of fungal diseases on rubber crops in the region.
| Main Authors: | , |
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| Format: | info:eu-repo/semantics/article biblioteca |
| Language: | spa |
| Published: |
Corporación Colombiana de Investigación Agropecuaria (Agrosavia)
2010
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| Subjects: | Enfermedades de las plantas - H20, Hevea brasiliensis, Caucho, Clonación, Enfermedades foliares, Permanentes, |
| Online Access: | http://revista.corpoica.org.co/index.php/revista/article/view/216 http://hdl.handle.net/20.500.12324/33878 |
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