. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. MYCOSPHAERELLA 215 tree should be cut down and burned, as it never becomes free from the disease. Farlow, G., Bull. Bessay Inst., 1875. Halsted, Neiv Jersey Agric. Coll. Expt. Station, Bull. 78. MYCOSPHAERELLA (Johans.) Perithecia as in Sphaerella, asci i6-spored, without para- physes; spores elongated, i-septate, hyaline. Pear leaf spot.—The early defoliation of pear-trees has for long been considered to be due to the presence of a fungus called Septori
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. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. MYCOSPHAERELLA 215 tree should be cut down and burned, as it never becomes free from the disease. Farlow, G., Bull. Bessay Inst., 1875. Halsted, Neiv Jersey Agric. Coll. Expt. Station, Bull. 78. MYCOSPHAERELLA (Johans.) Perithecia as in Sphaerella, asci i6-spored, without para- physes; spores elongated, i-septate, hyaline. Pear leaf spot.—The early defoliation of pear-trees has for long been considered to be due to the presence of a fungus called Septoria piricola (Desm.). This has recently been. 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 work.. Massee, George, 1850-1917. New York : Macmillan