Abstract
Abstract Virus-free (VF) plants of 6 cultivars of red raspberry (Rubus idaeus L.) were graft-inoculated with raspberry bushy dwarf (RBDV)-infected scions. Plants grown from root cuttings of the inoculated plants were established in a replicated field trial and their performance was compared with noninoculated plants for 4 years. ‘Haida’ and ‘Willamette’ did not become infected with the virus either by graft inoculation or by pollen transmission. The other cultivars, ‘Creston’, ‘Canby’, ‘Lloyd George’, and ‘Meeker’, were infected by graft inoculation. Moreover, after 4 years, all of the original VF plants of these cultivars were infected. Differences in virus effects between the original VF and RBDV-infected clones were greatest for ‘Meeker’ and least for ‘Creston’. Black raspberry necrosis virus (BRNV) was not associated with RBDV infection in Meeker although the cultivar is susceptible to the aphid vector of BRNV.
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