Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 442 DISEASES OF CULTIVATED PLANTS Pods that are severely attacked are often contorted or twisted, and in such instances the mycelium frequently passes quite through the pod and infects the beans. The conidiophores burst through the epidermis in tufts on the diseased spots, cylindrical, simple, 45-55 /* long; conidia apical, oblong, ends rounded, straight or curved, hyaline, i5-i9X3'5-5'5 Z-. Spines few in number, or sometimes absent, dark coloured. Professor Halsted says this fu
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 442 DISEASES OF CULTIVATED PLANTS Pods that are severely attacked are often contorted or twisted, and in such instances the mycelium frequently passes quite through the pod and infects the beans. The conidiophores burst through the epidermis in tufts on the diseased spots, cylindrical, simple, 45-55 /* long; conidia apical, oblong, ends rounded, straight or curved, hyaline, i5-i9X3'5-5'5 Z-. Spines few in number, or sometimes absent, dark coloured. Professor Halsted says this fungus is also parasitic on cucumbers, pumpkins, water-melons and musk- melons. If this is correct it may also endanger cucumbers, vegetable marrows, and melons, in this country. Spraying with Bordeaux mixture early in the season will either check or prevent the appearance of the disease. This cannot be continued after the plants commence to bloom. Diseased pods and leaves should be removed. Seed showing traces of infection should not be sown. A damp situation favours the spread of the fungus. Bull. Fig. \Tfi.—CoUetotrkhu)Hlimit- muthianuiH. i, diseased pod of scarlet-runner ; 2, section through a pustule of the fungus showing conidiophores bearing conidia at their tips, also two long, sterile spines, which should have been dark in colour, highly mag. Halsted, p. 246. Massee, 1898. Voglino, Fungidannosi alle Fiante Coltivaie, pi. 8. Torny Bot., 20, Gard. C/iro/t., May 7, Witches' brooms of cacao.—In 1900 Ritzema Bos announced the presence of a serious disease of the cacao-tree, which appeared under the guise of witches' brooms, which he attributed to a fungus he named Fxoascus ihcobromae. I soon afterwards examined specimens of the same disease from Surinam, forwarded by Mr. Hart of Trinidad to Kew, for
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