Abstract
Field tests at three sites over a period of three to four years have shown that PVYo spread in New Brunswick starts in mid-to late July when plants reach maximum height. Some 62 different genera or species of aphids were collected in experimental plots. Only seven of these were known vector species. Of the colonizing species, the alate green peach aphid,Myzus persicae (Sulzer), seems to be the most important vector. However, because it is not always present when disease spread starts, non-colonizing aphids are probably responsible for the early spread of PVYo. Five of these species of aphids were tested in the laboratory to determine their vector efficiency. A list of potential vectors is presented. The impact of these findings on the management of PVYo is discussed.
Compendio
Pruebas de campo en tres lugares, sobre un período de cuatro años han demostrado que la diseminación de PVYo en Terranova comienza entre mediados y fines de Julio, cuando las plantas alcanzan su altura máxima. En parcelas experimentales se colectaron unos 62 géneros o especies diferentes de áfidos. Solamente siete de estos fueron especies conocidas de vectores. De las especies colonizadoras, el áfido verde del melocotoneroMyzus persicae (Sulzer) parece ser el vector más importante. Sin embargo, debido a que no siempre se encuentra presente cuando se inicia la diseminación de la enfermedad, los áfidos no-colonizantes son probablemente los responsables para una diseminación anticipada de PVYo. Se probaron en el laboratorio cinco de estas especies de áfidos para determinar su eficiencia como vector. Se presenta una lista de vectores potenciales. Se discute el impacto de estos hallazgos sobre el manejo de PVYo.
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Boiteau, G., Singh, R.P., Parry, R.H. et al. The spread of PVYo in New Brunswick potato fields: Timing and vectors. American Potato Journal 65, 639–649 (1988). https://doi.org/10.1007/BF02854832
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DOI: https://doi.org/10.1007/BF02854832