Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 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 whe
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 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).
Size: 1256px × 1593px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
