Submitted to: Biological and Cultural Tests for Control of Plant Diseases
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 22, 1997
Publication Date: N/A
Technical Abstract: Breeding selections and standard cultivars were evaluated for their reaction to diseases that commonly occur in Idaho. Verticillium wilt, early blight, and common scab evaluations were done in fields at the University of Idaho Research Center, Aberdeen. Soft rot evaluations were done by inoculating tuber samples harvested from one of the test sites in mid Sep using 10 6 cells/ml Erwinia carotovora var. atroseptica. Tubers were evaluated after 7 days incubation in a mist chamber at 20 degrees Centigrade. The varieties Ranger Russet and Chipeta showed good Verticillium wilt resistance but not early blight resistance. A number of the advanced breeding selections were resistant to Verticillium and moderately resistant to early blight. Of particular note is A82360 which is being considered for release as a variety. Most breeding selections were resistant to common scab except for 3 that were moderately susceptible. Selection A8894-8 showed exceptional soft rot resistance in this first year of testing. No late blight occurred in the plots.