. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 103 are somewhat curled up, and the asci a[)pear on their lower surface.! Exoascus cerasi Fuck, occurs very commonly on cherry trees (Fninus Ccrasus and P. avium) both in Europe and It produces witches' brooms, which may be large, upwardly directed, bush-like, and very conspicuous structures, witli numerous thickened and elongated twigs (Fig. :3); or they may be small, hanging bunche
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 103 are somewhat curled up, and the asci a[)pear on their lower surface.! Exoascus cerasi Fuck, occurs very commonly on cherry trees (Fninus Ccrasus and P. avium) both in Europe and It produces witches' brooms, which may be large, upwardly directed, bush-like, and very conspicuous structures, witli numerous thickened and elongated twigs (Fig. :3); or they may be small, hanging bunches of twigs with upturned free ends. The leaves are somewhat wavy, slightly crumpled, and reddish ; on their lower epidermis they bear asci, and fall otf pi'i' , as in Fig. The brooms are visible at a considerable distance in the winter (Fig. oQ), while they are even more conspicuous during the lowering season (Fig. 57). At the latter time, before the leaf-buds open, the cherry trees are normally covered with white blossom, while the brooms bear leaves only, and rarely blossom. Hence they produce little or no fniit. P^ach tree ' Wehmer (Bot. Zeituwj 1896) discusses the formation of these witches' brooms. (Edit.) - E. Rathay, " Uber die Hexenbesen d. ;—5(7;«HrMf>*. 'Z. A'- K. Akad. zii Witn, 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-; Smith, William G. London, New York [etc. ] Longmans, Green & co.
Size: 1392px × 1794px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
