AJEV
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Am. J. Enol. Vitic. 45:2:188-191 (1994)
Copyright © 1994 by the American Society for Enology and Viticulture.
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Howell, G. S.
Right arrow Articles by Koblet, W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Howell, G. S.
Right arrow Articles by Koblet, W.
Agricola
Right arrow Articles by Howell, G. S.
Right arrow Articles by Koblet, W.

Response of Pinot noir Grapevine Growth, Yield, and Fruit Composition to Defoliation the Previous Growing Season

G. Stanley Howell 1, M. Carmo Candolfi-Vasconcelos 2, and Werner Koblet 2

1 Department of Horticulture, Michigan State University, East Lansing, MI 48824
2 Swiss Federal Research Station for Fruit Growing, Viticulture and Horticulture, CH-8820 Wadenswil, Switzerland.

Leaf removal has been increasingly employed to improve the cluster microclimate. Leaf loss has been suggested to reduce fruitfulness and hardiness of buds at that node. Before such a practice can be accepted in temperate zone climates, the impact on such bud and subsequent growth factors requires critical evaluation. Leaf removal at a point about half way between fruit-set and veraison (berry pea-size or 7 mm diameter) during Year 1 (1989) had minimal impact on main and lateral leaf number or area, vine yield or yield components, or fruit composition values in Year 2 (1990). No defoliation occurred in 1990. One notable exception was the increase in percentage of shootless nodes at positions where leaves had been removed. Node position influenced bud fruitfulness (nodes 1 and 2 had lowest yields) and node 4 (where the basal cluster was commonly produced) consistently was less fruitful than node 3, 5, or 6). It was also significantly more frequently shootless. Further experimentation should be undertaken to assess the impact of leaf removal on bud and cane cold hardiness and fruitfulness suggested by these data in climates where such damage is a persistent viticultural concern.

Key words: leaf removal, canopy management, bud initiation, bud differentiation

Submitted on July 22, 1992




This article has been cited by other articles:


Home page
 Am. J. Enol. Vitic.Home page
M. C. Vasconcelos, M. Greven, C. S. Winefield, M. C.T. Trought, and V. Raw
The Flowering Process of Vitis vinifera: A Review
Am. J. Enol. Vitic., December 1, 2009; 60(4): 411 - 434.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
G. Lebon, G. Wojnarowiez, B. Holzapfel, F. Fontaine, N. Vaillant-Gaveau, and C. Clement
Sugars and flowering in the grapevine (Vitis vinifera L.)
J. Exp. Bot., July 1, 2008; 59(10): 2565 - 2578.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1994 by the American Society for Enology and Viticulture.