File:Our native grape. Grapes and their culture. Also descriptive list of old and new varieties (1893) (14759075806).jpg

Identifier: ournativegrapegr00cmit (find matches)
Title: Our native grape. Grapes and their culture. Also descriptive list of old and new varieties
Year: 1893 (1890s)
Authors: C. Mitzky & Co
Subjects: Grapes Grapes Viticulture
Publisher: Rochester, N.Y., W. W. Morrison, printer
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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n to swell, with Bordeaux mixture. Whenthe leaves are one-third grown make a second application of the same fungicide,following with a third when the vines are in full bloom. After this, applicationsshould be continued at intervals of ten or twelve days until the first signs of ripeningare noticed. This will usually be three weeks or a month before the Grapes areready to pick. In no case should the treatment be continued up to the time ofharvest, as this is entirely unnecessary ; moreover, it is sure to render the fruitunsightly. It is important to bear in mind that in case of dry weather the sprayingsshould cease. METHOD B.—Following the direction laid down under Method A, with theexception that the ammonical solution be used instead of Bordeaux mixture. METHOD C—For the first three sprayings use the Bordeaux mixture, then sub-stitute the ammoniacal solution for the rest of the season. The cost of the treatment as laid down in Method A need not exceed two and OUR NATIVE GRAPE. 59
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UNTREATED. BLACK ROT. TREATED. The above illustrations show two bunches of Grapes, one without any treatmentwhatever, while the other cluster was three times sprayed with the Bordeaux mixtureand twice with the ammoniacal solution of copper carbonate. 6o OUR NATIVE GRAPE. one-half cents per vine. Method B will cost two cents and Method C the same.So far as efficacy is concerned there is little choice. All things considered,however, Method A will doubtless prove the most satisfactory. Downy Mildew. When this disease occurs alone ammoniacal solution or modified eau celeste maybe used. The first spraying should be made when the fruit is well formed, the othersat intervals of ten or twelve days as recommended for black rot. What is known asbrown rot is caused by the fungus of Downy Mildew. It is seldom that brown rotoccurs in the berries without the leaves being also affected. In regions where thishappens the treatment recommended for black rot should be followed. In some sections eau cele

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