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Transmission of Three North American Isolates of Plum Pox Virus: Identification of Aphid Vectors and Species-Specific Transmission from Infected Stone Fruits
- North American populations of 13 aphid species were tested for their ability to transmit isolates of Plum pox potyvirus recovered from infected trees in Adams, Franklin, and York Counties, PA. Seven species, Aphis fabae, A. spiraecola, Brachycaudus persicae, Metopolophium dirhodum, Myzus persicae, Rhopalosiphum padi and Toxoptera citricida transmitted PPV in unrestricted probing tests utilizing 'Colmo' pea as both the PPV source and transmission bioassay indicator. A. spiraecola and M. persicae were the most efficient vectors with 86% and 83% of 100 seedlings infected when infested with 25-50 aphids each. M. dirhodum and R. padi only occasionally transmitted PPV to pea (2%). Although T. citricida was an effective vector (36% in pea), it is restricted to Florida and does not occur in major stone fruit growing areas of North America. The six aphids that did not transmit PPV included Acyrthosiphum pisum, Aphis glycines, Aulacorthum solani, Macrosiphum euphorbiae, Rhopalosiphum maidis, and Sitobion avenae. When given an acquisition period on PPV-infected peach seedlings and then allowed an unrestricted inoculation period on healthy peach seedlings, M. persicae, A. spiraecola, A. fabae, and B. persicae transmitted PPV to 63%, 31%, 38%, and 32% of the seedlings, respectively. When acquisition fed on infected peach fruit and allowed an unrestricted probing period on peach seedlings, the same aphid species transmitted PPV to 50%, 35%, 0%, and 0% of seedlings, respectively, in replicated tests. In summary, Pennsylvania isolates of PPV were transmitted effectively by indigenous aphid populations, were acquired and transmitted from fruit collected from infected orchard trees over two growing seasons, and had different degrees of transmission efficiency when acquired from foliar or fruit tissues.
Gildow, F.E. , Levy, L. , Damsteegt, V.D. , Stone, A.L. , Schneider, W.L. , Luster, D.G.
Plum pox virus , disease transmission , insect vectors , Aphidoidea , species differences , stone fruits , Prunus , Prunus persica , vector potential , vectorial capacity , Pennsylvania
- Paper presented at the XIX International Symposium on Virus and Virus-like Diseases of Temperate Fruit Crops - Fruit Tree Diseases held in Valencia, Spain.
- Acta horticulturae 2004 Sept., no. 657
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.