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Overwintering and monitoring of potato leafroll virus in some wild crucifers |
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| Authors: | Lee Fox K. Duane Biever H. Harold Toba James E. Duffus Peter E. Thomas |
| Affiliation: | 1. USDA, ARS, Yakima Agricultural Research Laboratory, 98902, Yakima, WA 2. USDA, ARS, U.S. Agricultural Research Station, 93905, Salinas, CA 3. USDA, ARS, Agriculture Research and Extension Center, 99350, Prosser, WA |
| Abstract: | A potato leafroll virus (PLRV) isolate has been successfully transmitted to and recovered from two wild crucifers,Sisymbrium altissimum L. (Jim Hill or tumble mustard) andCapsella. bursa-pastoris (L.) Medic. (shepherd’s purse) by the green peach aphid (GPA),Myzus persicae (Sulzer). Virus antigen in both plant species was found to be higher in root tissue than in foliar tissue, based on enzyme-linked immunosorbent assay (ELISA) determinations.C. bursa-pastoris was apparently a relatively poorer source of inoculum for the GPA thanS. altissimum. Using two geographically-separated biotypes ofC. bursa-pastoris, a Washington biotype was found to contain higher antigen titer in both leaf and root tissue than a California biotype, as determined by ELISA. Field studies demonstrated that both weed species can serve as overwintering sources of PLRV |
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