Comprehensive Survey of Common Scab in Alaskan Potato Tubers
Applied Research
Casey Matney
Agriculture & Horticulture Agent
Soldotna
Abstract
Common scab, caused by soil bacteria in the genus Streptomyces, poses a significant threat to potato crops, leading to unsightly lesions on tubers and potential yield reduction. Dr. Leslie Wanner's 2009 scab survey for North America identified twelve pathogenic species of common scab, with five dominant species accounting for 98% of isolates. At that time, a handful of tubers from one location in Alaska were submitted for testing, which resulted in identifying only one species: S. europaeiscabiei. To provide updated insights into the prevalence and distribution of common scab across the state, the UAF Cooperative Extension Service in collaboration with the Alaska Plant Materials Center conducted a widespread survey covering potatoes harvested during the fall of 2021 and 2023. Harvested potatoes with lesions were excised and processed with a Qiagen DNA extraction kit. All the tuber lesions were analyzed via PCR. Results from the survey and implications for controlling potato scab in Alaska will be presented.
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted only for display at AM/PIC. Poster is not to be judged, but the abstract will be published in the proceedings.
A poster file has not been provided
Authors: Casey Matney, Christine Macknicki, Todd Steinlage
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Matney, C. Agriculture & Horticulture Agent, University of Alaska Fairbanks, Alaska, 99669
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Macknicki, C. Potato Program Microbiologist, Alaska Plant Materials Center, Alaska, 99645
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Steinlage, T. Plant Pathologist, Alaska Plant Materials Center, Alaska, 99645