. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 324 FUNGOUS DISEASES OF PLANTS. FlG. 155. COLLETOTRICHUM FROM BEAN : an Isolation Culture. (Photograph by Geo. F. Atkinson) a few dark colored setae are The conidia measure 15-19 x —*. They germinate readily and usually become septate during the process. Each conidium is inclosed by a gelatinous envelope which when dry glues it to other spores or to any object upon which it falls ; when moist, however, the spores are readily sepa- rated and distributed. Control.
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 324 FUNGOUS DISEASES OF PLANTS. FlG. 155. COLLETOTRICHUM FROM BEAN : an Isolation Culture. (Photograph by Geo. F. Atkinson) a few dark colored setae are The conidia measure 15-19 x —*. They germinate readily and usually become septate during the process. Each conidium is inclosed by a gelatinous envelope which when dry glues it to other spores or to any object upon which it falls ; when moist, however, the spores are readily sepa- rated and distributed. Control. Very diverse methods of controlling this important disease have been suggested. Seed se- lection is important, but it is not sufficient to select seed which do not appear to be infected, for many minute infections will be overlooked. It is desirable, therefore, to select healthy seed from healthy pods, preferably from a field which shows the disease slightly or not at all. Whetzel's experi- ments thus far seem to indicate that this latter type of selection yields most satisfactory results. Spraying with Bor- deaux mixture, 5—5—50 formula, is to be advised when the disease ap- pears early and when the facilities are at hand to make a thorough application of the spray. Burning infected material is necessary; moreover, rotation of crops is important. 1 The setae in this case are not commonly a conspicuous part of the acervulus, and in a cursory examination of the fungus they may be sometimes overlooked. In fact, this fungus was at first placed in the genus Gloeosporium. It is possible that climatic conditions or the texture of the host may be important in determin- ing the relative number of 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; N
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