Outline of ampelography for the vinifera grapes in California
AuthorFrederic T. Bioletti
Author AffiliationsFrederic T. Bioletti was Professor of Viticulture, Emeritus.
Hilgardia 11(6):227-293. DOI:10.3733/hilg.v11n06p227. June 1938.
Abstract does not appear. First page follows.
The word “ampelography” by its derivation from ampelos—vine—and graphe—writing—means the description of vines. In actual modern usage it is usually confined to what may be called the horticultural description of grapes. It differs both in purpose and material from botanical description. The taxonomic botanist deals with species, each consisting of a group of like plants which are more similar to one another than to the members of any other species; the horticultural ampelographist deals principally with variations among seedlings of the same species.
The species of the botanist is a group of like individuals, usually seedlings; the variety of the ampelographist is a single individual—the clone—or the totality of all the plants derived by vegetative propagation from a single seedling3 and constituted therefore simply of parts of the same individual. The variations of the seedlings of a species in nature are comparatively rare and tend to disappear in competition with the type most suited to the environment. Under culture, any of these variations which are found desirable by man are propagated and preserved and in time may become very numerous.
In their Ampelographie, Viala and Vermorel4 list 24,000 names and synonyms of grapes representing about 5,000 varieties, derived principally from one species, Vitis vinifera.
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Mechanized grape grafting: Portable machine developed for bench or field grafting of grapes saves time and eliminates the need for skilled labor
Grape leaf folder: Field tests compared effectiveness of insecticides in control of vineyard pest
Crown blight of cantaloupe: Experimental plots established in Imperial Valley to refute or confirm observations made in earlier studies of disorder
Frost protection by sprinklers: Use of overhead sprinklers for frost protection on low growing plants tested on blueberries in Santa Cruz County
Russet on Bartlett pears: Neither sprays nor dusts applied during the cluster-bud and bloom period increased russeting in tests during 1956 season
Scaly bark disease of citrus: Nine-year study of seven older orange orchards indicates advance of psorosis may be faster than is generally believed
Fumigants for citrus nematode: Several fumigants available for treatment of old citrus soil for control of nematode before replanting with young trees