• Some Foreign Potato Maladies and Domestic Pests of Potato in Alaska

      Dearborn, Curtis H. (School of Agriculture and Land Resources Management, Agricultural and Forestry Experiment Station, 1983-04)
      Disease-free potato seed pieces, or potatoes grown from true seed derived from seedballs grown in Alaska, produce potato crops in Alaska free from most serious pests that afflict potatoes grown in other states and countries. Precautions are offered to aid in maintaining this relatively clean, potato-growing environment. Maladies indigenous to Alaska are potato scab, Streptomyces scabies; black scurf, Rhizoctonia so/ani; silver scurf, Spondylocladium atrovirens; leak, Pythium spp.; skin spot, oa·spora pustulans; and Fusarium spp. Of these only scab and black scurf are significant. Photographs to acquaint Alaskans with serious diseases, insects, and nematodes of other potato-growing regions of the world are presented. Illustrations of symptoms of maladies indigenous to Alaska are included as well as photographs of serious, introduced potato troubles that could be eradicated if a reasonable degree of persistence were exercised.