Factors impacting blackleg development caused by Dickeya spp. in the field

摘要: Stem rot symptoms caused by pectinolytic bacteria of Genus Pectobacterium and Dickeya, which are commonly referred to as blackleg, strongly impact the quality seed potato production in most European countries. Several biotic abiotic factors, such cultivar susceptibility, isolate aggressiveness, mother tuber infection density a wide range soil-related climatic factors have been identified literature having an effect on blackleg development. The aim this study was identify and/or critical development field. In Switzerland, predominant species belonged Dickeya far back 1992, is why only investigates induced isolates. Seven field trials, inoculated tubers were planted, conducted during 3-year period number blackleg-diseased plants counted. Multiple regression analysis used order determine that had greatest two different variables: (i) periods between emergence plant disease outbreak (ii) overall incidence throughout growing season. results revealed environmental evapotranspiration soil moisture, explain about half variability days before outbreak, total diseased widely dependent upon susceptibility aggressiveness.