Shoot growth rate and density affect bud necrosis of 'Riesling' grapevines

Examination of 'Riesling' grape (Vitis vinifera L.) in Virginia suggested that a high incidence of bud necrosis (BN) in some vineyards was associated with canopy shade and rapid shoot growth. BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary...

Full description

Saved in:
Bibliographic Details
Published inJournal of the American Society for Horticultural Science Vol. 120; no. 6; pp. 989 - 996
Main Authors Wolf, T.K. (Virginia Tech, Winchester, VA.), Warren, M.K
Format Journal Article
LanguageEnglish
Published 01.11.1995
Subjects
ACLAREO
BOURGEON
COUVERT
CUBIERTA DE COPAS
DENSIDAD
DENSITE
DIMENSION
ECLAIRCISSAGE
ENCUESTAS SANITARIAS
ENQUETE PATHOLOGIQUE
ENTRE NOEUD
INDICE DE CRECIMIENTO
INTERNODIOS
LUMIERE
LUZ
METODOS DE CULTIVO
MODE DE CULTURE
NECROSE
NECROSIS
OMBRE
PACLOBUTRAZOL
SOMBRA
TALLO
TAUX DE CROISSANCE
TIGE
VIRGINIA
VIRGINIE
VITIS VINIFERA
YEMA (PLANTA)
Online AccessGet full text

Cover

More Information
Summary:Examination of 'Riesling' grape (Vitis vinifera L.) in Virginia suggested that a high incidence of bud necrosis (BN) in some vineyards was associated with canopy shade and rapid shoot growth. BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary, buds of the developing dormant bud. BN frequency was lowest among the basal four nodes of a given shoot or cane, and increased in frequency through node 20. Experiments were conducted in 1991 and 1992 to evaluate the specific involvement of shoot growth rate and canopy shade on 'Riesling' BN. Shoot growth rate (SGR), measured in a 17-day period around bloom, had a significant, positive relationship with BN in one of two vineyards. BN was positively associated with cane diameter and average internode length. Applying the growth retardant paclobutrazol significantly reduced SGR and BN incidence up to 80% among nodes 6 to 15 in two separate vineyards. Artificial shade (64% or 92% reduction in photosynthetic photon flux), suspended over vine canopies in the 3-week period before veraison, did not affect BN. Shoots of canopies that had been thinned before bloom to 10 shoots/m of canopy expressed slightly lower BN levels than shoots sampled from canopies that had been thinned to 20 shoots per meter. 'Riesling' BN appeared more influenced by shoot vigor than shade under Virginia growing conditions
Bibliography:F60
H50
9706994
F01
ISSN:0003-1062
2327-9788
DOI:10.21273/JASHS.120.6.989