. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. VALSA. 225 where leaves of the alder are dried in summer for use as winter-fodder for goats. In the branches attacked, a mycelium is developed in the vessels of the wood, whereby the supply of water is stopped and the bark dries up. Black lens-shaped stromata arise under the epidermis of the twig and rupture it. The perithecia are produced under the stromata in the bark, and communicate. Fig. 109.— Valsa oxy&tom
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. VALSA. 225 where leaves of the alder are dried in summer for use as winter-fodder for goats. In the branches attacked, a mycelium is developed in the vessels of the wood, whereby the supply of water is stopped and the bark dries up. Black lens-shaped stromata arise under the epidermis of the twig and rupture it. The perithecia are produced under the stromata in the bark, and communicate. Fig. 109.— Valsa oxy&toma on Alnus viridis. Ay Portion of branch with stroma of Vatsa breaking through the periderm at foxir places. .B, Enlarged section through a stroma from A. C, Asci and ascospores, isolated from a perithecium. B, Portion of younger branch with periderm ruptured by stromata, in which, however, the not yet developed. E, Enlarged section through a stroma of D. (After v. Tubeuf.) with the exterior by means of long projecting necks. The asci contain eight unicellular spores of a slightly bent, rod- like shape. Maturity is reached on the dry dead twigs. Externally this disease is identical in appearance with one I ascertained to be due to a beetle (Cryptorhynchus lapathi),. 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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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
