PT - JOURNAL ARTICLE AU - David P. Miller AU - G. S. Howell AU - R. K. Striegler TI - Cane and Bud Hardiness of Selected Grapevine Rootstocks AID - 10.5344/ajev.1988.39.1.55 DP - 1988 Jan 01 TA - American Journal of Enology and Viticulture PG - 55--59 VI - 39 IP - 1 4099 - http://www.ajevonline.org/content/39/1/55.short 4100 - http://www.ajevonline.org/content/39/1/55.full SO - Am J Enol Vitic.1988 Jan 01; 39 AB - Controlled freezing tests were used to evaluate the cold hardiness of cane and bud tissues of the grapevine rootstocks Kober 5BB (5BB), Couderc 3309 (C-3309), and Selection Oppenheim No. 4 (SO4) for three dormant seasons. T50 values were compared for each sampling date. Bud hardiness differences between rootstocks were variable. Cane hardiness for all rootstocks was similar through November, with C-3309 acclimating more rapidly in two of the three dormant seasons. C-3309 was more hardy than 5BB on a number of dates throughout the study. From December through March, C-3309 always had the most hardy and 5BB the least hardy canes in all three dormant seasons.