. 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. 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, reach leaves and shoots of alpine-ro
. 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. 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, reach leaves and shoots of alpine-rose where they immediately germinate. The resulting mycelium produces in September yellow clusters of uredospores on brownish spots on the lower epidermis of the leaves, and on the bark of last year's shoots (Fig. 210).. Fig. 209.—Clu-ymmyoM rhndndendri. Twig of Rhododendron with sort of uredo- spores on the lower epidermis, causing dis- coloured spots on the upper, (v. Tubeuf del.). 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
Size: 1661px × 1505px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
