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agar Agronomist Alternaria malt apple leaves artiﬁcial inoculation Bacteriologist Ben Davis black rot Bordeaux mixture cankered wood Cankers and mummies caused by Sphaeropsis Coniothyrium constantly present control of frog-eye Copper-lime-sulphur Coryneum foliicolum COUNTY EXPERIMENT STATIONS Date Fungus dead or cankered defoliated E. R. HODGSON Enlargement Crescents enlargement of frog-eye Entomologist ﬁgures ﬁnally ﬁrst noticeable ﬁve foliage frog-eye leaf spot frog-eye spot fruit growers Fungi Which Grew Fusarium Greenhouse Hendersonia Illosporium malifoliorum infected with frog-eye initial infection July July 13 June June 23 mali MONTGOMERY COUNTY naria orchards Pestalozzia Phyllosticta limitata Phyllosticta pirina pirinum pure culture pycnidia round spots Saccardo°s saprophytes seared season secondary enlargement shows that Sphaeropsis small circular brown Sources of Infection Sphaeropsis is constantly Sphaeropsis malorum Sphaeropsis spores Splneropsis spot begins Spot of Apple spray injury SPRAYING EXPERIMENTS starch Superintendent TABLE thrust cultures tree over winter Virginia Winesap York Imperial young spots