Essays on the Early History of Plant Pathology and Mycology in CanadaRalph Estey chronicles the history of plant pathology and mycology in Canada from this early period to the late 1940s when it entered its professional, biochemically oriented phase. His major topics include the pioneering roles of entomologists and horticulturists in the genesis of plant pathology; the influence of diseases in potatoes, grain, and forage crops on early developments in plant pathology and mycology; the factors prompting the development