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 PESTALOZZIA. 493 rind of young plants of spruce and silver fir, I succeeded in finding near the place of constriction, a delicate mycelial stroma enclosing some cavities (pseudopycnidia). Conidia were formed inside these cavities and emerged to the exterior. They belong to the genus Pcstalozzia, and have two brown median cells, a trans- parent stalk-cell to which the long stalk is attached, and a tran
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 PESTALOZZIA. 493 rind of young plants of spruce and silver fir, I succeeded in finding near the place of constriction, a delicate mycelial stroma enclosing some cavities (pseudopycnidia). Conidia were formed inside these cavities and emerged to the exterior. They belong to the genus Pcstalozzia, and have two brown median cells, a trans- parent stalk-cell to which the long stalk is attached, and a transparent terminal cell carrying two or three transparent thread- like appendages (Fig. 303). Germination resvdts in the emission of a strong germ-tube from one of the three lower cells. If at any time the conidia dry up, the two clear transparent cells Fig. 304.—Pestalo-zia juncrea on Chamaecvparis MenzUsii. At the places marked X cambium and rind have been killed, so that growth in thickness no longer takes place ; the higher parts, however, have continued to thicken, but are gradually dj-ing. (v. Tubeuf phot.) collapse and the appendages easily fall off, so that on material of this kind the conidia are only two-celled and brown. The mycelium after cultivation in nutritive gelatine soon produces conidia. This fungus was found by Eostrup on Ijeech, producing much the same effects as just described. On this host it has been found very destructive in young naturally regenerated forest, the loss in Bavaria and Wurtemburg within very recent years having been estimated at 30 per cent. It also occurs on ash, sycamore, and other trees. P. funerea Desm. (Britain and America). The spores of
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