La tolérance au gel de nouveaux cépages Vitis vinifera cultivés au nord-est des Etats-Unis

FREEZING TOLERANCE OF VITIS VINIFERA CULTIVARS NEW
TO NORTHEASTERN UNITED STATED

Abstract

Grapes are temperate crops and are most frequently damaged by freezing temperatures. The severe economic losses that result from the freezing injury continue to be a major constraint to the growth of the grape and wine industries in cold regions. The long-term goal of this project is to identify cultivars that are adapted to the weather conditions in Northeastern United States. In this study, the freezing tolerance (FT) of more than 20 Vitis vinifera cultivars was determined at two sites for two seasons in Ohio. Buds were collected periodically between September and April and then subjected to controlled freezing tests. FT was determ