. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 4U UREDINEAE. The aecidia appear in June as wrinkled yellow sacs emerging from the bark of swellings. They continue to develop in succession for years on the living parts of attacked branches, but according to Hartig they cease to make their appearance on old stems, even when a mycelium is present. This disease is the cause of great damage to pines, especially where planted as pure forest. One
. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 4U UREDINEAE. The aecidia appear in June as wrinkled yellow sacs emerging from the bark of swellings. They continue to develop in succession for years on the living parts of attacked branches, but according to Hartig they cease to make their appearance on old stems, even when a mycelium is present. This disease is the cause of great damage to pines, especially where planted as pure forest. One case is recorded ^ of a forest near Kohlfurt where 90 per cent, of the trees in an old plantation were " stag-headed" on account of a deficient. Fig. 248.—Pfridermium 'piiii. Section through a diseased stem of Pine showing the gradual killing of the cambium by the fungiis. (v. Tubeuf phot.) supply of water in the crown accompanying attacks of this fungus. Until more is known of its life-history, preventive measures cannot be well extended beyond cutting down infected trees. The following species of Pendermium have been observed on species of Pinus: A. On the needles: Peridermium oblongisporium Fuck, (now Coleospormm senecionis) on Finns Sj/Icestris and J\ <iu,stri(ira (p. 374). P. Klebahni, P. Soraueri, P. Stahlii, P. Plowrightii, and P. Fischeri. On Pinus sylvestris ; related to various species of Coleospurium. P. piriforme Peck. On Pinus speciosa in America. P. cerebrum Peck. On Pinus rigida in North America. ^ Marker at .Sclilesien. Forstverein, 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-. London Longman's, Green
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
