Significant variability in the level of resistance to common scab disease (to both disease incidence-tuber surface area affected, and severity-lesion depth) within potato (Solanum tuberosum) cv. Russet Burbank clonal lines and other selected processing cultivars was shown. Across two trials, cvs. Russet Nugget and Shepody and Russet Burbank clone British Columbia were consistently grouped within the cluster of least disease incidence whereas cv. Russet Norkotah and Vancouver unit four were grouped within the cluster showing greatest disease incidence. Russet Nugget and British Columbia were also consistently grouped within the cluster showing least disease severity, whereas Shepody and Russet Burbank clone Starks were grouped within the cluster with greatest severity scores. For some clones, consistency of rating across trials was not always apparent. Of note for the Tasmanian industry, there were differences within the five commercial Vancouver clonal units used interchangeably, with unit 4 showing significantly greater disease severity and incidence than some of the other units. However the extent of increased disease never exceeded 1.75 times the best of the other 'Vancouver units and the relevance of these results to the relative field performance of unit 4 remains to be tested.

Item Type:	Refereed Article
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Horticultural production
Research Field:	Horticultural crop protection (incl. pests, diseases and weeds)
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Horticultural crops
Objective Field:	Field grown vegetable crops
UTAS Author:	Wilson, CR (Professor Calum Wilson)
ID Code:	21388
Year Published:	2001
Web of Science® Times Cited:	10
Deposited By:	Agricultural Science
Deposited On:	2001-08-01
Last Modified:	2004-05-11
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