. The American fruit culturist. s common to theleaves. The filaments of thefungus come to the surface through the StomateS and Fig. 291.—Shows threads of Grape Mildew ,, , . 1 T T ,. arising through breathing pore of leaf, then they branch and SUbdl- ^^^^^^^^^ branching and bearing spores vide, producing the spores upon their tips. (Prom Scribner.) upon the tips (see Fig. 291). Remedies.—The same treatment is recommended here as forthe diseases of the grape already considered. As all thesetroubles may be upon the same vine, or even single leaf, itfollows that the remedy applied for one will an
. The American fruit culturist. s common to theleaves. The filaments of thefungus come to the surface through the StomateS and Fig. 291.—Shows threads of Grape Mildew ,, , . 1 T T ,. arising through breathing pore of leaf, then they branch and SUbdl- ^^^^^^^^^ branching and bearing spores vide, producing the spores upon their tips. (Prom Scribner.) upon the tips (see Fig. 291). Remedies.—The same treatment is recommended here as forthe diseases of the grape already considered. As all thesetroubles may be upon the same vine, or even single leaf, itfollows that the remedy applied for one will answer for all. The Powdery Mildeiv {Uncinula necator Schw.) is anotherfungus of the vine that while the leading enemy in Europe is ofsecondary consideration here. This is a superficial mildew—that is, it grows upon the leaf and does not penetrate thetissue, and on this account may be easily controlled as by sul-phur dusted over the vines. The sprayings recommended forthe other vine diseases will be sufficient for this 236 THE DISEASES OF FRUITS. The Ripe Rot {Glceosporium frucfigenum Berk.), previouslymentioned under apple, is a common trouble with the matur-ing grapes. It need not be further considered here, except tonote that in this instance widely different plants are affectedwith the same fungus. It should, however, be kept in mindthat this is a disease of a substance—namely, the flesh of amaturing fruit—that is more of the nature of a lifeless tissueand has lost its specific vital qualities. In the same way thecommon bread mould will thrive upon mature sweet potatoesand turnips, while the living leaves and stems of the sameplants are not attacked by it. The Bush Fruits. The Blackberry.—Rust {Piiccinia Peckiana Howe) is theleading fungus of the blackberry and is quickly recognized bythe more upright dwarfed canes with multitudes of blistersupon the leaves which upon rupturing expose orange coloredspores that give an appearance of iron rust to the affectedp
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