. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 649 F. gemmiperda Aderh. is described by Aderliold "" as fatal to flower buds of cherry before they open, a conclusion supported by inoculation experiments. The disease in general appearance re- sembles sclerotiniose. F. rhizogenum P. & C. Sporodochia superficial, 1 to 2 mm. wide, dense, convex, white or whitish, hyphse densely interwoven, septate, subramose; conidia oblong, roundish, 1-septate, 70 x 4 /«. It was originally described as a parasite on apple roots in Ne- braska '"
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 649 F. gemmiperda Aderh. is described by Aderliold "" as fatal to flower buds of cherry before they open, a conclusion supported by inoculation experiments. The disease in general appearance re- sembles sclerotiniose. F. rhizogenum P. & C. Sporodochia superficial, 1 to 2 mm. wide, dense, convex, white or whitish, hyphse densely interwoven, septate, subramose; conidia oblong, roundish, 1-septate, 70 x 4 /«. It was originally described as a parasite on apple roots in Ne- braska '" and is mentioned by Aderhold ^ as the cause of death of roots of apple and cherry trees in Europe. The mycelium grows within the roots and gummosis of the wood occurs. A Cephalo- sporium form is known, also chlamydospores. F. putrefaciens Osterw.'^^'"^ is said by Osterwalder "* to cause decay of pomaceous fruits. F. cubense E. F. Sm. was isolated from bananas affected with blight. Inoculation showed the fungus capable of growing through the bundles for long distances.'™ F. limonis Bri.™ »"• ^^ Sporodochia gregarious, confluent, white; hyphse spreading, branched, septate; conidiophores erect, with alternate or opposite branches; conidia variable, acrogenous, continuous to 3-septate, oblong to fusiform, curved, pointed, slightly constricted, 26-27 x fi. This fungus is held to be contributory to, if not responsible for, the Mal-di-gomma or foot-rot of citrous fruits which is knoAvn practically wherever these fruits are cultivated. F. culmorum (W. Sm.) Sacc.^*' ^^ Reddish-yellow, gelatinous, effuse; h3rphae few-septate, tortuous; fertile, short, con- tinuous; conidia fusoid-falcate, 3 to 5-sep- tate, 28-32 x 6-8 fi on wheat. Fiq. 438.—f. culmorum. The fungus affects chaff and seed, first ^*^' ^''^'*"- appearing as a whitening of the upper halves of the glumes fol- lowed later by a pink color. The glumes become cemented to- gether and the whol
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
