Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC EXOASCEAE. 155 while the stone, including the embryo, remains stunted. (Fig. 49.) The 'pocket-plums' (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. S
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC EXOASCEAE. 155 while the stone, including the embryo, remains stunted. (Fig. 49.) The 'pocket-plums' (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. Sometimes a considerable thickening and twisting of the young shoots takes place, and their leaves curl up. Fir 4 —Eroascus pruni. Twig of Plum, with four deformed fruits; one iiuijiittl pluiii is partially hidden, the other is in the middle, i natural Mze. (v. Tubeuf del.) The mycelium hibernates in the soft bast of the twigs, and proceeds thence in spring into young shoots and ovaries. According to De Bary, the infected ovaries double their size in two days, and are full grown in eight days. The asci form a close layer under the cuticle of the ovary, and finally rupture it.
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