Comparison of methods for estimating Erwinia carotovora numbers on potato tubers |
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| Authors: | JM Chard SJP Oxley† |
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| Institution: | *Department of Microbiology, East of Scotland College of Agriculture, West Mains Road, Edinburgh EH9 3JG, UK;†Crop Protection Department, East of Scotland College of Agriculture, West Mains Road, Edinburgh EH9 3JG, UK |
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| Abstract: | Two methods for estimation of the numbers of Erwinia carotovora on potato tubers were compared using 17 naturally infected stocks. The 'wash' method estimates the surface count, whereas the 'peel' method is based on a subcuticular count. A correlation of 0.79 was obtained. Comparisons between methods were also made using a bactericide, Myacide As, and on stocks during chitting. Erwinia carotovora counts were reduced in treated tubers with the 'wash' method, but not with the 'peel' method. |
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