Diseases of plants induced by 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 diseasesofplants00tubeuoft Year: 1897 THE tarasitk; exoasceae. 163 are suuiewhat curled up, ami the asci appear on tlieir lower surface. 1 Exoascus cerasi Fuck, occurs very coininonly on ciierry trees (rrumi (_', rostis and P. ) both in Eur(jpe and It produces witches' brooms, which may be large, upwardly <lirected, bush-like, and very conspicuous structures, with numerous thic
Diseases of plants induced by 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 diseasesofplants00tubeuoft Year: 1897 THE tarasitk; exoasceae. 163 are suuiewhat curled up, ami the asci appear on tlieir lower surface. 1 Exoascus cerasi Fuck, occurs very coininonly on ciierry trees (rrumi (_', rostis and P. ) both in Eur(jpe and It produces witches' brooms, which may be large, upwardly <lirected, bush-like, and very conspicuous structures, with numerous thickened and elongated twigs (Fig. .'3); or they may be small, hanging bunches of twigs with upturned free ends. The leaves are somewhat W'avy, slightly crumpled, and reddish ; on their lower epidermis tliey bear asci. and full olT prematurely. (v. Tiibcul iihot.) I Ik'. Tile brooms are visible at a considerable distance in ihc winter (Fig. 56), while they are even more conspicuous during the flowering season (Fig. r>7). At the latter time, before the leaf-buds open, the cherry trees are normally covered with white bloss(»m, while the brooms bear leaves only, ami rarely Ijlossom. Hence they produce little or no fiuit. Kach tree ' Wehnier {/iof. X>iinit'/ lS!)(j) tlio foniiiaioii of tlusc witcht'M* ljr<M)iii8. (Kdit.) â¢â E. Kfithiiy, '⢠Ulxi- ilio lluxenheseii il. KirsclibiUimen.'âSilzniiyslnr. if. A'. A', Ahtil. , U', ISNl.
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