Volume 58 Number 3 Article 19
Year 2004 Month 7
Title: Chambourcin' Grapevine Response to Crop Level and Canopy Shade at Bloom
Authors: D.C. Ferree, D.M. Scurlock, T. Steiner and J. Gallander
Abstract:
'Chambourcin' grapevines were thinned at bloom to leave 8, 16, or 24 clusters/m of row and half were
covered with 80% shade cloth for five days.
All treatments were repeated on the same vines for four years.
Five days of shade at bloom had no effect on any parameter measured in 1999, 2000 and 2002. In 2001,
yield was reduced by shade and the interaction between shade and crop level was significant.
Flower number,
berries per cluster and yield were increased by shade at 8 clusters/m, but decreased at higher crop levels.
As
clusters per meter of row increased, clusters per vine and yield increased linearly and the following
decreased linearly: number of flowers, berries per cluster, cluster weight, juice soluble solids and pH. Fruit
set and juice titratable acidity were not affected by any of the treatments.
Results of this study confirm that
'Chambourcin' is very sensitive to crop level and crop level may need to be reduced to 8 clusters per meter
of row or 9-14 t/ha to produce high quality wine under Midwest environmental conditions.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 926478 bytes)
APS membership administration
ISHS membership administration
