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The South American forage legume Arachis pintoi was found to be affected by foliar ring spot symptoms in surveys of various localities in the Cauca Valley of Colombia. A filamentous virus (approximately 750 nm) isolated from symptomatic A. pintoi plants induced the characteristic ring spot sympto...


Morales, Francisco JoséCastaño, M.Velasco, Ana CeciliaArroyave, José A.[Natural infection of tropical forage legume species of Arachis and Stylosanthes by potyviruses related to peanut mottle virus]Natural infection of tropical forage legume species of Arachis and Stylosanthes by potyviruses related to peanut mottle virus

A tymovirus was isolated from passion fruit plants with conspicuous yellow mosaic leaf symptoms in Colombia. Partial sequencing of its genome showed that this virus is distinct from other tymoviruses for which nucleotide sequences are available; it had only 60 76% homology with the closest relate...


Morales, Francisco JoséLozano Potes, ICastaño, M.Arroyave, José A.Velasco, Ana CeciliaVaron de Agudelo, F.[Partial characterization of a tymovirus infecting passion fruit in Colombia, South America]Partial characterization of a tymovirus infecting passion fruit in Colombia, South America

A filamentous virus approximately 775 nm long was isolated from variegated plants of the tropical forage grass Brachiaria spp. collected in Colombia and Brazil, South America. Ultrathin sections of symptomatic leaf tissue showed cylindrical inclusions (scrolls) in the cytoplasm of infected cells....


Morales, Francisco JoséCastaño, M.Velasco, Ana CeciliaArroyave, José A.[Detection of a potyvirus related to guineagrass mosaic virus infecting Brachiaria spp. in South America]Detection of a potyvirus related to guineagrass mosaic virus infecting Brachiaria spp. in South America
Nolt, Barry L.Pineda López, BenjamínVelasco, Ana Cecilia[Surveys of cassava plantations in Colombia for virus and virus- like diseases]Surveys of cassava plantations in Colombia for virus and virus- like diseases

Large quantities of cassava common mosaic virus (CCMV) were purified from systemically infected Nicotiana benthamiana plants. A polyclonal antiserum, with a titre of 1/128 in the tube precipitin test, was produced by immunising rabbits with purified virus. Viral antigens were detected in cassava,...


Nolt, Barry L.Velasco, Ana CeciliaPineda López, Benjamín[Improved purification procedure and some serological and physical properties of cassava common mosaic virus from South America]Improved purification procedure and some serological and physical properties of cassava common mosaic virus from South America
Nolt, Barry L.Pineda López, BenjamínVelasco, Ana Cecilia[Avances sobre identificación, detección y manejo de los virus de la yuca en América Latina]Avances sobre identificación, detección y manejo de los virus de la yuca en América Latina

Los geminivirus transmitidos por la mosca blanca Remisia tabaci Genn., han causado pérdidas considerables de producción en varios cultivos de importancia socioeconómica en regiones tropicales y subtropicales del mundo entero, incluyendo la mayoría de los países de la América Latina. En Colombia, ...


Morales, Francisco JoséMuñoz, C.Castaño Zapata, M.Velasco, Ana Cecilia[Geminivirus transmitidos por mosca blanca en Colombia]Geminivirus transmitidos por mosca blanca en Colombia

Se han presentado brotes de enfermedades virales antes desconocidas en habichuela y en tomate en varios municipios del Valle del Cauca. Las habichuelas presentan un arrugamiento foliar severo y amarillamiento moderado, mientras que el tomate muestra síntomas moderados de mosaico y deformación fol...


Morales, Francisco JoséMartínez, A.K.Velasco, Ana Cecilia[Nuevos brotes de begomovirus en Colombia]Nuevos brotes de begomovirus en Colombia

En 1998 se inició una investigación para determinar la etiología a de dos enfermedades de aparente naturaleza viral, que afectan el cultivo de la palma africana de aceite en el suroccidente colombiano. La pre sencia de la mancha anular se registré por primera vez en 1985, en el municipio de Tum...


Morales, Francisco JoséLozano Potes, IArroyave, José A.Castaño, M.Sedano Cruz, REVelasco, Ana Cecilia[Enfermedades virales de la palma de aceite en el suroccidente colombiano y sus agentes causales]Enfermedades virales de la palma de aceite en el suroccidente colombiano y sus agentes causales
Morales, Francisco JoséLozano, IvanVelasco, Ana CeciliaArroyave, José A.[Detección de un virus asociado a la mancha anular de la palma de aceite en Tumaco, Nariño = Detection of a fovea-like virus in African oil palms affected by a lethal ŽringspotŽ disease in Tumaco, Nariño]Detección de un virus asociado a la mancha anular de la palma de aceite en Tumaco, Nariño = Detection of a fovea-like virus in African oil palms affected by a lethal ŽringspotŽ disease in Tumaco, Nariño

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