. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 354 FUNGOUS DISEASES OF PLANTS effuse colonies, the aerial portions of which are at first gray, be- coming darker with age. The pycnidia may sometimes be pro- duced in agar and also upon various solid media in tube cultures. Control. Preventive meas- ures have not been carefully worked out. Under ordinary circumstances orchards in good condition will suffer least. Advantage may also be de- rived from treating the limbs and trunk thoroughly with any " cleaning up " washes,
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 354 FUNGOUS DISEASES OF PLANTS effuse colonies, the aerial portions of which are at first gray, be- coming darker with age. The pycnidia may sometimes be pro- duced in agar and also upon various solid media in tube cultures. Control. Preventive meas- ures have not been carefully worked out. Under ordinary circumstances orchards in good condition will suffer least. Advantage may also be de- rived from treating the limbs and trunk thoroughly with any " cleaning up " washes, or with Bordeaux mixture. For varie- ties susceptible to sunscald, after which the canker may be common, it is recommended to give a winter spraying with white- wash. Pruning and scraping may also be required, and along with this the wholesale destruction of affected limbs or Fig. 172. Isolation Culture of SpHyEROPS/S MALORUM XLVII. RASPBERRY CANE BLIGHT Coniothyrium Fuckelii Sacc. Stewart, F. C. Raspberry Cane Blight and Raspberry Yellows. N. Y. (Geneva) Agl. Exp. Sta. Built. 226: 331-366. pis. 1-6. 1902. Habitat relations. This is a fungus which, as a disease-produc- ing organism, has been known only a few years ; and it may be that the species is new. The botanical name given above is applied to a fungus which was described as occurring on a variety of shrubs and trees, the genus Rubus being among the hosts mentioned. Stewart and Eustace have tentatively referred the fungus caus- ing raspberry cane blight to this variable species. The cane blight is a widespread disease in New York state, and doubtless quite common throughout the country upon rasp- berries. It is essentially a wilt disease (Fig. 173), and the principal damage results to the fruiting canes. In some instances, however, young canes may be killed during the first season of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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