Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PJ' >-''i;.;i Fig. 49.—AV(//-;,; dl/isinia. i, ;i hiMnch recently attacked, showing concentric cracking of the bark ; 2, an old wound showing a rugged callus round the wound ; 3, section through a stroma showing perithecia, a. on its surface ; 4, a peritheciuni; 5, section of same; 6, conidia; 7, a conidium germinating; 8, ascus containing spores, and accompanied by paraphyses. Figs, i and 2 reduced ; remainder highly mag. more prevalent, and perhaps it is not going too fa
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PJ' >-''i;.;i Fig. 49.—AV(//-;,; dl/isinia. i, ;i hiMnch recently attacked, showing concentric cracking of the bark ; 2, an old wound showing a rugged callus round the wound ; 3, section through a stroma showing perithecia, a. on its surface ; 4, a peritheciuni; 5, section of same; 6, conidia; 7, a conidium germinating; 8, ascus containing spores, and accompanied by paraphyses. Figs, i and 2 reduced ; remainder highly mag. more prevalent, and perhaps it is not going too far to state that if we had no American blight or woolly aphis, we should have no epidemic of canker. The bark is first attacked and destroyed, often cracking in a concentric manner. After-
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