Visual incidence of symptoms associated to viral diseases in potato crops of Colombia
Abstract
Viral diseases are one of the most limiting factors in potato production. Recently, vein yellowing (VY) caused by PYVV has become one of the diseases with the highest incidence in potato crops in Colombia. In this work, symptoms commonly associated with viral infection were evaluated in potato crops from four provinces of Colombia, with emphasis in the vein yellowing disease. A correlation between VY, rugose mosaic (RM), leaf roll (LR) and dwarf (D) symptoms and the presence of potyvirus, PLRV, PVS and PVX was determined by ELISA. The presence of PYVV was determined by RT-PCR. Incidence for each symptom was: RM (16%), LR (10%), VY (7%) and D (2%). The highest levels of VY (>20%) were observed in Eastern Antioquia and Ipiales (Nariño). There was not significant correlation between a symptom and a specific virus, since Potyvirus and PVS were found in 68% and 30% of samples, respectively. PYVV was detected in all samples with VY. However, at least another virus was found in 15% of these samples.
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INSTITUTO COLOMBIANO AGROPECUARIO. [online]. 2013. Disponible: http://www.ica.gov.co/Paginas-Especiales/ [citado 15 de Noviembre de 2013].
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