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espanolLos begomovirus forman parte del grupo de virus emergentes que afectan cultivos de interes agricola a nivel mundial. Las arvenses pueden constituirse facilmente en hospederos alternos de estos virus y ser fuente de inoculo de los mismos. El objetivo de este trabajo fue detectar begomovirus presentes en arvenses asociadas al cultivo de tomate en Cundinamarca, Colombia. Se colectaron arvenses con y sin sintomas virales en cultivos de tomate localizados en los municipios de Pasca y Fusagasuga, Cundinamarca. Se purifico el DNA genomico total de cada arvenses y para evidenciar la presencia de begomovirus se realizo una reaccion en cadena de la polimerasa con oligos especificos para detectar el componente genomico A viral. Se recolectaron 36 arvenses, de las cuales 22 especies fueron identificadas taxonomicamente. Stellaria media, Veronica persica, Galinsoga ciliata, Malva sylvestris y una especie de la familia Asteraceae resultaron positivas para begomovirus. Para las especies Stellaria media y Galinsoga ciliata, constituyen el primer reporte a nivel mundial como hospederos de begomovirus. La especie Veronica persica es identificada como reservorio de begomovirus por primera vez en America Latina. Finalmente, la especie Malva sylvestris y una especie de la familia Asteraceae se reportan por primera vez como hospederos de begomovirus para Colombia. El control efectivo de las arvenses identificadas como hospederos alternativos para begomovirus es una estrategia efectiva para disminuir el impacto de esta familia de virus en los cultivos de tomate. EnglishBegomoviruses are part of the group of emerging viruses that affect crops of agricultural interest worldwide. Weeds can easily become alternate hosts of these viruses and be a source of inoculum for them. The objective of this work was to detect bipartite begomoviruses present in weeds collected in tomato crop in Cundinamarca, Colombia. Weeds were collected with and without viral symptoms in tomato crops located in the municipalities of Pasca and Fusagasuga, Cundinamarca. The total genomic DNA of each weed was purified and to demonstrate the presence of begomovirus a polymerase chain reaction was performed with specific oligos for detected the genomic component A viral. 36 weeds were collected, of which 22 species were identified taxonomically. Stellaria media (L.) Vill., Veronica persica Poir., Galinsoga ciliate (Raf.) S.F. Blake, Malva sylvestris L. and one species of the family Asteraceae were positive for bipartite begomoviruses. For the species Stellaria media (L.) Vill. and Galinsoga ciliate (Raf.) S.F. Blake, they constitute the first report worldwide as begomovirus hosts. The species Veronica persica Poir. is identified as a reservoir of begomovirus for the first time in Latin America. Finally, the species Malva sylvestris L. and a species of the family Asteraceae are reported for the first time as hosts of begomoviruses for Colombia. Effective control of weeds identified as hosts for begomoviruses is an effective strategy to reduce the impact of this virus family on tomato crops.

Nuevas arvenses hospederas de Begomovirus colectadas en cultivos de tomate (Solanum Lycopersicum l.) en Cundinamarca