Abstract
The corky ringspot disease of potato (Solanum tuberosum) caused by the tobacco rattle virus (TRV) is a serious problem in certain Idaho localities. To investigate natural TRV sources, weeds and plants from rotation crops were randomly collected from six fields with a history of corky ringspot symptoms. Transmission trials, Ouchterlony agar double-diffusion tests, and electron-microscopy showed evidence of TRV in three Idaho counties (Fremont, Ada, and Canyon). Inoculations were made from 27 species and TRV was recovered from the roots of three:Solanum nigrum, Brassica campestris, andErodium cicutarium. Solanum nigrum was the most consistent source of TRV and it generally incited the severest symptoms onNicotiana tabacum (Samsun NN). The results show thatS. nigrum, besides being an important wild host of TRV, may be a useful naturallyoccurring bait plant for detection of TRV in field soils.
Resumen
La enfermedad del “corcho anular” de la papa (Solanum tuberosum) causada por Tobacco Rattle Virus (TRV)*, es un problema serio en ciertos lugares de Idaho.
Para investigar fuentes naturales del TRV se colectaron en forma randomizada, malezas y plantas de cosechas en rotación de 6 campos con historial de síntomas de “corky ringspot”. Ensayos de transmisión, pruebas de “Ouchterlony” agar-doble difusión y por medio del microscopio electrónico se demostró la presencia del TRV en tres localidades (condados) de Idaho: (Fremont, Ada y Canyon). Se hicieron inoculaciones de 27 especies y el TRV fué recuperado de raíces de 3 de ellas:Solanum nigrum, Brassica campestris, y Erodium cicutarium. Solanum nigrum fué la fuente más consistente de TRV y generalmente provoca los síntomas más severos enNicotiana tabacum (Samsun NN). Los resultados muestran queS. nigrum además de ser una maleza hospedera importante del TRV podría utilizarse como una planta “diagnóstico” de ocurrencia natural para la detección del TRV en los suelos de campo.
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Virus del cascabel del tabaco.
Approved by Director of Agricultural Experiment Station as Research Paper No. 74724.
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Davis, J.R., Allen, T.C. Weed hosts of the tobacco rattle virus in Idaho. American Potato Journal 52, 1–8 (1975). https://doi.org/10.1007/BF02852099
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DOI: https://doi.org/10.1007/BF02852099