. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. Fi<i. «7 Lirnien leaf spot {Cerrosponi). found in the vicinity of Cape Cod. The ash is also subject to a leaf spot (Septoria leucostroma E. & E.) and mildews {PhijUactinia suffulta (Reb.) Sacc. and Phyl- losticta viridis E. & K.). Locust (Robinia). — The locust is unusually susceptible to borers, and when attacked by them often l)ecomes infected with various species of fungi. Linden (Tilia). — The leaves of the linden are sometimes .badly affected with leaf spots, svich as Cercospnrn microsora Sacc, which may b
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. Fi<i. «7 Lirnien leaf spot {Cerrosponi). found in the vicinity of Cape Cod. The ash is also subject to a leaf spot (Septoria leucostroma E. & E.) and mildews {PhijUactinia suffulta (Reb.) Sacc. and Phyl- losticta viridis E. & K.). Locust (Robinia). — The locust is unusually susceptible to borers, and when attacked by them often l)ecomes infected with various species of fungi. Linden (Tilia). — The leaves of the linden are sometimes .badly affected with leaf spots, svich as Cercospnrn microsora Sacc, which may be largely controlled by. Fig. Linden tree in center sprayed twice witli Bordeaux mix- ture; otliers unsprayed. si)raying. The linden in some locations suffers very badly from frost cracks. The American basswood {Tilia aniericana) is subject to a leaf mildew (I'ltcinulu clin- tonii Lev.) and to the leaf spot (Cercospora tilia Pk.). Elm {Ulmus). — The most common leaf spot found on the elm is Dothidella ulmi (Duv.), which is characterized by numerous small black spots on the upper surface of the leaves. Another leaf spot by Phleospora ulmi Wallr. is characterized by numerous small spots from which gelatinous masses exude in damp Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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