There are basically two types of grafting, bench grafting and field grafting. Worldwide the main reasons for bench grafting vines are: a) to obtain vines of the desired fruiting variety on roots resistant to phylloxera or nematodes, or b) to obtain vines on roots tolerant to certain soil conditions such...
Pinot noir research in Oregon is aimed at improving wine quality and production and at increasing the diversity of virus-free clonal material available to our wine industry. Numerous clones of Pinot noir have been identified in France where the cultivar is known for its wide range of genetic variability. Because...
For the past three years we have been bringing rootstocks into Oregon for inclusion into the OSU Grapevine Mother Block at the Lewis-Brown Farm east of Corvallis. Most of the material has come from the Foundation Plant Materials Service (FPMS) at Davis. The main purpose of the Mother Block is...
Spring freeze decreased the yield of field grown grapevines by 70%. The spring bud development of Pinot noir was characterized into seven stages after the initial budbreak, 96% of the buds attained full development in 44 days. Controlled freezing tests were used to determine bud hardiness. The T50 values (temperature...
A research trial was started in 1987 at Woodhall III Vineyard in Alpine to analyze the changes in composition which occur during ripening of Pinot noir and to determine their effect on wine composition and quality. This study developed in response to industry experience and our own problems with trying...
Cool weather during fruit initiation and bloom can cause wide yield fluctuations in Oregon vineyards. These fluctuations in clusters per vine, flowers per cluster, and berries per cluster make yield prediction difficult. Over- or underestimates of yield have caused problems in marketing grapes and viticultural decision making. Oregon State University...
Proceedings of the 62nd Annual Western Orchard Pest and Disease Management Conference, held January 13-15, 1988 at the Imperial Hotel in Portland, Oregon.
Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog