. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PIRICULARIA. Piricularia. 503 Oonidia grey, pluricellular, somewhat pear-shaped, and pro- duced from the apex of simple erect conidiophores. Piricularia oryzae Br. et Cav. This species is described by Briosi and Cavara as causing a disease of rice in Northern Italy. The plants become spotted and reddish-brown in summer, finally withering. The conidiophores arise on the spots on the lower surface of the leaf, and bea
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PIRICULARIA. Piricularia. 503 Oonidia grey, pluricellular, somewhat pear-shaped, and pro- duced from the apex of simple erect conidiophores. Piricularia oryzae Br. et Cav. This species is described by Briosi and Cavara as causing a disease of rice in Northern Italy. The plants become spotted and reddish-brown in summer, finally withering. The conidiophores arise on the spots on the lower surface of the leaf, and bear light-grey three-celled. Fio. 308.—Mojtigosporium album, (v. Tubeuf deL) oonidia. Diseased plants may be found bearing this fungus only, frequently however it is in company with other fungi. Cercosporella. Conidia hyaline, similar to those of Cercospora, and produced from simple or branched hyaline conidiophores. Cercosporella persica Sacc. is parasitic on living leaves of peach. In America it has been known since 1890, and receives the name of "frosty ; It causes yellow spots on the lower surface of the leaf. 0. pastinacae Karst. occurs on living leaves of cultivated 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 Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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