Fungous diseases of plants . the conidia fre-quently become massedtogether in balls. Theyvary from to 8/zin diameter, and arecapable of immediategermination, producing a much branched mycelium. The macro-conidia are far less frequent in culture and in nature than themicroconidia. The method of production of the former type ispractically the same as in the case of the microconidia. There is,however, greater vacuolation of the protoplasmic contents duringthe formation of the macroconidia, which, moreover, may becomeovoidal, and finally further elongate, becoming once or more mea
Fungous diseases of plants . the conidia fre-quently become massedtogether in balls. Theyvary from to 8/zin diameter, and arecapable of immediategermination, producing a much branched mycelium. The macro-conidia are far less frequent in culture and in nature than themicroconidia. The method of production of the former type ispractically the same as in the case of the microconidia. There is,however, greater vacuolation of the protoplasmic contents duringthe formation of the macroconidia, which, moreover, may becomeovoidal, and finally further elongate, becoming once or more measure x Owing to the fact that theconidia are in general microconidia, properly the type of the genusSporotrichum, this fungus is retained in that genus. Control. This disease is often one of serious importance inwell-arranged and sanitary carnation houses ; but it is apparentlymost to be feared where conditions for forcing the host are desired,or where unsanitary conditions prevail. Control or prevention. Fig. 129. Sporotrichum PoAi: Cunidioph(jresAND Conidia FUNGI IMPERFKCTI 295 therefore concerns itself primarily with a maintenance of condi-tions as dry and cool as is compatible with satisfactory growth,and also with matters of general sanitation, such as proper ven-tilation, destruction of diseased parts, and all defective specimens,leaves, and other refuse. Affected buds should also be pickedoff and burned. Susceptible varieties should not be grown wherethe disease prevails. VI. A riNK ROT FOLLOWINC; APPLE SCABCcphalotlicciiDJi roscnin Cda. Craig, John, and Van Hook, J. M. Pink Rot. An Attendant of Apple Scab. Cornell Univ. Agl. Exp. Sta. Built. 207: 199-210. fii^s. J6-40. , A Destructive Apple Rot Following Scab. N. Y. Agl. Exp. Sta. Built. 227 : 367-389. pis. i-S. 1902.
Size: 1977px × 1263px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbostonnewyorketcgi
