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CHAPTER ONE Precision bias and cost in time of three
Materials and Methods
11 other sections not shown
10g subsamples 1983 growing season 1ml aliquots analysis of variance average inoculum level average soil inoculum base coccodes coefficient colony forming units commercial potato fields DeVay dilution plating technique disease early dying epidemiology of Verticillium estimates of inoculum field soil four commercial potato fumigated fungus hypothesis incidence of stem individual quadrats infection by Verticillium infested soil samples isolated large study areas medium naturally infested soil number of Petri number of propagules observed pathogen pattern of inoculum Petri plates Phytopathology Poisson distribution Pratylenchus penetrans precision present study propagules per gram random relationship Russet Burbank potatoes sample mean sample of soil samples taken small study areas soft-rot Erwinia soil assay soil inoculum density soil inoculum levels soil samples assayed spatial autocorrelation spatial patterns standard error stem colonization stem infection Thesis three commercial potato three fields University of Wisconsin-Madison vascular bundles infected Verticillium albo-atrum Verticillium dahliae Verticillium wilt wilt of potato