Reactions of 11 Potato Cultivars against Some Important Soil-Borne Pathogens

摘要

In this study, surveys and the reaction to diseases of some potato (Solanum tuberosum L.) cultivars ('Satina', 'Vangogh', 'Marabel', 'Latona', 'Marfona', 'Vericus', 'Jearla', 'Cosmos', 'Granola', 'Hermes', 'Agria') against important soil-borne pathogens were conducted. In surveys, the most isolated genus was Rhizoctonia sp., Fusarium sp., Phytophthora sp. and Pythium sp. The isolation ratio of each genus varied between locations. Eleven commercial potato cultivars were evaluated for their reactions to Rhizoctonia solani (stem cancer and black scurf), Fusarium solani (Fusarium wilt), Phytophthora erythroseptica (pink rot) and Pythium deliense (root rot). Cultivars exhibited different levels of susceptibility to the pathogens. The most susceptible cultivars were 'Satina' and 'Jearla'. 'Satina', the most sensitive cultivar, had high disease severity ratios to R. solani, F. solani, P. erythroseptica and P. deliense (40, 100, 80 and 65%, respectively). 'Hermes' and 'Agria' were resistant to all diseases.