ARS | Publication request: THE LEAFROLL NET NECROSIS REACTION OF IMPORTANT PACIFIC NORTHWEST POTATO CULTIVARS AND BREEDING SELECTIONS

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: Advanced breeding selections and varieties were evaluated for tuber reaction to potato leafroll virus infection from 1987 to 1995 at the University of Idaho Research Center, Kimberly, Idaho. Green peach aphids were allowed to establish and spread naturally into test plots from adjacent leafroll-infected Russet Burbank spreader plants. Breeding selections, A81473-2 and A8495-1, and the variety Ranger Russet were tested from 6 to 9 years and showed almost no serious net necrosis defect (0.3-0.4%) and very little moderate defect (1.6-8.4%). A082611-7 and A82360-7 were tested 3 years and 2 years, respectively, and showed no serious net necrosis symptoms. These are comparable to Atlantic in resistance to leafroll net necrosis. The varieties CalWhite, Frontier Russet, and Shepody, and the breeding selections, A84118-3 and C0083008-1, were as susceptible or more susceptible than Russet Burbank to net necrosis symptoms. This information may be of value in selecting varieties for use in leafroll IPM programs.