New Zealand Journal of Crop and Horticultural Science abstracts

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Further investigations of raspberry bushy dwarf virus
in New Zealand

G. A. WOOD

The Horticulture and Food Research
Institute of New Zealand
Mt Albert Research Centre
Private Bag 92 169
Auckland, New Zealand

Abstract  In a test of 30 red raspberry (Rubus idaeus L.), hybrid berry, and Boysenberry (R. ursinus Chamisso and Schlechtendal) selections, bred in New Zealand or imported from overseas in recent years, only two were found to be infected with raspberry bushy dwarf virus (RBDV). However, 18 were found to be susceptible to infection by graft-inoculation with the virus. Results of graft-inoculating eight New Zealand sources of RBDV to cultivars known to be susceptible to the resistance breaking strain (RBDV-RB), but immune to the common strain (RBDV-S), suggests that the resistance breaking strain is unlikely to be present in New Zealand. Testing for RBDV in a number of commercial Boysenberry plantings in the Nelson district, indicated that the virus was widespread there in this crop. In tests to produce an indicator for the leaf yellowing symptom of RBDV, `Marion' blackberry (R. ursinus derivative) proved unreliable, but consistent vivid yellows on the red raspberry cultivar `Autumn Britten' (formerly `3676/6') suggest it to be the best indicator yet found in New Zealand. The leaf yellows found on the cultivars `Southland' and `Taranaki' may be non-transmissible syndromes. Leaf symptoms were not found on Boysenberry following graft inoculation with RBDV, and the leaf symptoms caused by black raspberry necrosis virus (BRNV) were not accentuated when combined with RBDV. When thorny and thorn-free Loganberries (R. loganobaccus Bailey) were graft-inoculated with RBDV, no degeneration of growth was observed.

Keywords  Rubus; raspberry bushy dwarf virus disease; red raspberry; hybrid berry; Boysenberry selections; leaf yellowing symptoms; crumbly berry fruit symptoms

New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23: 273-281

0114-0671/95/2303-0273 $2.50/0 (c) The Royal Society of New Zealand 1995

PDF file of entire paper: medium quality (1143K); (scanned from paper original: notes about this process)

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