Effect of time and date of inoculation,plant age,and temperature on translocation of potato leafroll virus into potato tubers |
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Authors: | R. H. Storch F. E. Manzer |
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Affiliation: | 1. Department of Entomology, University of Maine at Orono, 04469, Orono, ME 2. Department of Botany and Plant Pathology, University of Maine at Orono, 04469, Orono, ME
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Abstract: | Movement of potato leafroll virus (PLRV) to tubers following placement of viruliferous aphids on foliage was studied on the medium-maturing cultivar, Katahdin and the late-maturing cultivar, Russet Burbank. Inoculation was begun on August 20 and continued at three-day intervals until mid-September. There was no trend of increasing or decreasing numbers of leafroll-infected tubers from early to late inoculation. Several variables were examined to determine their effects on the incidence of PLRV-infected tubers. Multiple regression analyses showed that inoculation date, maximum daily temperature, minimum daily temperature, plant age, and length of time from inoculation to harvest explained 38% of PLR incidence in tubers of cv. Katahdin. Length of time from inoculation to harvest and minimum daily temperature explained 40% of PLR incidence in tubers of the cv. Russet Burbank. |
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