. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. THE DISEASES OF FRUITS. 235 and the burning of the diseased parts is all the more impor- tant. The Downy Mildew {Plasmopara viticola B. & C.) is a fungus quite different in appearance from any thus far considered. As its name suggests it produces a downy coating upon the affected part, usu- ally the under side, with a yellow discoloration of the upper side of the leaf. The affected fruits while half grown turn brown prema- turely, and for this rea
. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. THE DISEASES OF FRUITS. 235 and the burning of the diseased parts is all the more impor- tant. The Downy Mildew {Plasmopara viticola B. & C.) is a fungus quite different in appearance from any thus far considered. As its name suggests it produces a downy coating upon the affected part, usu- ally the under side, with a yellow discoloration of the upper side of the leaf. The affected fruits while half grown turn brown prema- turely, and for this reason the term "brown rot" is sometimes given to this disease. The browned ber- ries remain hard and never become edible and rarely show the fungus upon the stirface. Sometimes the canes are infested, when they are coated with the downiness common to the leaves. The filaments of the fungus come to the surface through the StomateS and ^^'^- 291âShows threads of Grape Mildew then thev branch and subdi- ^'â '^*°^ through " breathing pore " of leaf, men tney orancn ana SUOai afterward branching and bearing spores vide, producing the spores upon their tips. (From Scribner.) upon the tips (see Fig. 291). Remedies.âThe same treatment is recommended here as for the diseases of the grape already considered. As all these troubles may be upon the same vine, or even sing\e leaf, it follows that the remedy applied for one will answer for all. The Powdery Mildew (Uncinula necator Schw.) is another fungus of the vine that while the leading enemy in Europe is of secondary consideration here. This is a superficial mildewâ that is, it grows upon the leaf and does not penetrate the tissue, and on this account may be easily controlled as by sul- phur dusted over the vines. The sprayings recommended for the other vine diseases will be sufficient for this Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
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