Survival of the phytopathogenErwinia carotovorasubsp.carotovorain sterile and non-sterile soil, sand and their admixture

摘要: Survival of phytopathogens in irrigation water and irrigated soil is major concern to the agricultural community. In present study, an Erwinia carotovora subsp. strain was tested for survival capability three non-sterile heat-sterilized matrices (soil, sand + sand) over 35 d. all matrices, Erw. numbers declined below detection limit d, main variance being decline rate related nutrients available different respectively). revealed a regrowth, while sterile matrix its lower same time period. previous published reports, when sterilized by irradiation, such regrowth not observed. Application initial single load sodium nitrate solution (70 mg l -1 ) found extend bacteria columns. columns supplemented with nitrate, did survive well up 60 first 12 d day 60, reaching loading numbers. The information on potential should be concern, especially performed poor quality water.