. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 263 hibernation is supposed to be effected in some cases by means of the tuberculate stromata, which retain their vitality and serve as minute sclerotia, germinating the following spring. The asci average 40 /u, long, and the spores measure about 15 X 3-4 fi. Control. Healthy plants only should be set, and all spotted leaves should be pinched off. A thorough spraying with Bor- a b deaux mixture may be given FlG- "5- Mycosphmrella Fragar/^e, before the flowers arepp
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 263 hibernation is supposed to be effected in some cases by means of the tuberculate stromata, which retain their vitality and serve as minute sclerotia, germinating the following spring. The asci average 40 /u, long, and the spores measure about 15 X 3-4 fi. Control. Healthy plants only should be set, and all spotted leaves should be pinched off. A thorough spraying with Bor- a b deaux mixture may be given FlG- "5- Mycosphmrella Fragar/^e, before the flowers areppen, when CoNIDIAL AND Ascigerous Stages necessary. If the disease is serious or disastrous late in the season, its reappearance the next year may be delayed and to some extent averted by mowing off the leaves and burning over the bed. XLIII. LEAF-SPLITTING BLIGHT OF SUGAR CANE Mycospharella stratiformans Cobb Cobb, N. A. Fungous Maladies of the Sugar Cane. III. Leaf-Splitting Blight. Hawaiian Sugar Planters Exp. Sta. Built. 5 : 93-106. 1906. This is the name provisionally applied to a fungus which causes a peculiar leaf-splitting of sugar cane in portions of the Hawaiian Islands. The leaves are split, and in severe cases reduced to shreds. The ascogenous stage alone has been re- ported. The perithecia are produced abundantly. Diseased stalks should not be planted, and all leaf trash from an affected field should be destroyed. What appear to be related species of fungi have been described as injurious to cane in Java and in La Plata, Argentina. Mycosphaerella Cerasella is considered to be the ascog- enous form of Cercospora Cerasella Sacc, well known upon the leaves of cherry, sometimes producing a shot hole effect similar to that which may follow any leaf spot fungus parasitic upon species of Prunus. 1 Aderhold, R. Mycosphaerella cerasella n. spec, die Perithecienform von Cercospora cerasella Sacc, und ihre Entwicklung. Ber. d. deut. bot. Ges. 18 : 246-249. Pleas
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