RT Journal Article
SR Electronic
T1 Responses of Young Chardonnay Grapevines to Shoot Tipping, Ethephon, and Basal Leaf Removal
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 263
OP 268
DO 10.5344/ajev.1986.37.4.263
VO 37
IS 4
A1 T. K. Wolf
A1 R. M. Pool
A1 L. R. Mattick
YR 1986
UL http://www.ajevonline.org/content/37/4/263.abstract
AB Shoot tipping, apical ethephon application, basal leaf removal, and lateral shoot removal were evaluated for two years as means of reducing shade in the fruiting/renewal region of young Chardonnay grapevines pruned to a low head and trained to bilateral canes. Tipping shoots or apical ethephon application effectively controlled shoot elongation and caused minimal terminal or lateral shoot regrowth. These treatments did not measurably alter the light environment of the fruiting/renewal region relative to vines receiving no canopy manipulation. Intracanopy insolation was, however, significantly increased by removal of lateral shoots. Canopy treatments did not significantly affect yields, pruning weights, or bud cold hardiness in either year; however, opening the fruiting region of the canopy by lateral shoot and/or basal leaf removal generally reduced titratable acidity and malic acid and significantly reduced the incidence of botrytis bunch rot.