Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 128 PHYCOMYCETES. arise in tufts from the stoinata; they are branched in various ways, and from each branchlet a single conidium is abjointed. The contents of the conidia emerge as swarming cells with two lateral cilia, or as vesicles which emit a germ-tube. The egg-cells occur singly in each oogonium, and are fertilized by an antheridiun). The oospores remain long enclosed in the thick-walled oogoniu
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 128 PHYCOMYCETES. arise in tufts from the stoinata; they are branched in various ways, and from each branchlet a single conidium is abjointed. The contents of the conidia emerge as swarming cells with two lateral cilia, or as vesicles which emit a germ-tube. The egg-cells occur singly in each oogonium, and are fertilized by an antheridiun). The oospores remain long enclosed in the thick-walled oogonium. Fio. 39.—Planmopara viticola. Vine leaf with white spots on the under surface, from which tufts of conidiophores emerge, (v. Tubeuf del.) Plasmopara nivea (linger). (Britain and U. S. America). Inflicts great injury on various wild and cultivated Umbelliferae, carrot {Daucus Carota), parsley (Fetroselinum sativum), chervil {Anthrucu>i Cerefoliuvi). Plasmopara viticola, Berk. The Downy or False Mildew of Bibliography. De Bar}', Annal. d. sci. nat., 1863. Viala, Die Pilze d. Wtiiistockts; with good 1)ibliography. Prillieux, Annal. de. Vinstit. nat. agronomigue, 1881. Cornu, Le Peronospora des Vignes, Paris, 1882. Sajo,
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