Abstract
Green peach aphids (Myzus persicae (Sulzer) ) pose a threat to the Idaho potato (Solanum tuberosum L.) crop primarily because they transmit potato leafroll virus (PLRV). Only colonizing vectors are epidemiologically significant because PLRV is persistently transmitted. Additionally, Idaho winters are severe enough that most permanently anholocyclic aphid species do not establish. It is now accepted that the taxon that has been known asMyzus (Nectarosiphon)persicae (Sulzer) is in fact at least three species (M. persicae, Myzus nicotianae Blackman andMyzus antirrhinii (Macchiati) ). It was not known whether the newly designated species had the potential to damage the Idaho potato crop. The objectives of our research were to determine whetherMyzus (Nectarosiphon) spp. other thanM. persicae occurred naturally in Idaho, whether they could colonize potato and transmit PLRV, and whether they were potentially holocyclic.
NoMyzus (Nectarosiphon) spp. other thanM. persicae were found in Idaho in trap nurseries; howeverMyzus ascalonicus Doncaster recently has been found on stored bulbs and in suction trap collections in north Idaho. Laboratory bioassays for PLRV vector potential usingPhysalis floridana Rydb. indicator plants show thatM. nicotianae can transmit PLRV as efficiently asM. persicae. Similarly,M. nicotianae colonized potato as well asM. persicae in a replicated laboratory experiment comparing two clones ofM. nicotianae and one clone ofM. persicae. Our observations indicate that North AmericanM. nicotianae may be capable of a limited facultative holocycle. Thus, in laboratory experiments,M. nicotianae is as damaging asM. persicae with respect to PLRV vector potential; however,M. nicotianae may not occur naturally in areas like Idaho that have no tobacco production. A summary of allMyzus (Nectarosiphon) spp. with respect to PLRV epidemiology is provided.
Compendio
Los áfidos verdes del melocotonero [Myzuspersicae (Sulzer) ] representan un problema para el cultivo de papa (Solanum tuberosum L.) de Idaho debido principalmente a que ellos transmiten el virus del enrollamiento de la hoja de la papa (PLRV). Sólo los vectores que constituyen colonias son epidemiológicamente significativos debido a que elPLRV es persistentemente transmitido. Adicionalmente, los inviernos de Idaho son suficientemente severos de manera a que la mayoría de las especies de áfidos permanentemente anholocíclicas no se establecen. Se acepta ahora que el taxon que fuera conocido comoMyzus (Nectarosiphon)persicae (Sulzer) representa por lo menos tres especies [M. persicae, Myzus nicotianae Blackman yMyzus antirrhinii (Macchiati) ]. No se conocía si las especies designadas recientemente tenían el potencial para dañar el cultivo de papa en Idaho. Los objetivos de la investigación fueron determinar si las especies deMyzus (Nectarosiphon) diferentes aMyzus persicae ocurren naturalmente en Idaho, si ellas pueden colonizar a la papa y transmitir el PLRV y si eran potencialmente holocíclicas.
No se encontraron en los semilleros trampa, en Idaho, especies deMyzus (Nectarosiphon) diferentes alMyzus persicae, sin embargo, se ha encontrado recientemente en el norte de Idaho alMyzus ascalonicus Doncaster en bulbos almacenados y recolecciones en trampas de succión. Bioensayos de laboratorio para determinar el potencial de los vectores del PLRV, utilizandoPhysalis floridana Rydb. como planta indicadora, muestran queM. nicotianae puede transmitir el PLRV tan eficientemente como elM. persicae. Similarmente,M. nicotianae colonizó a la papa tan bien como elM. persicae en un experimento de laboratorio con repeticiones en el que se compararon dos clones deM nicotianae con un clon deM. persicae. Las observaciones indican que elM. nicotianae norteamericano puede ser capaz de un holociclo facultativo limitado. Así, an experimentos de laboratorio, elM. nicotianae es tan dañino como elM. persicae en relación al potencial como vector del PLRV; sin embargo,M. nicotianae puede no ocurrir naturalmente en zonas como Idaho en donde no se produce tabaco. Se presenta un resumen de todas las especies deMyzus (Nectarosiphon) en relación a la epidemiología del PLRV
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Halbert, S.E., Castle, S.J. & Mowry, T.M. Domyzus (nectarosiphon) species other thanm persicae pose a threat to the idaho potato crop?. American Potato Journal 72, 85–97 (1995). https://doi.org/10.1007/BF02987282
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DOI: https://doi.org/10.1007/BF02987282