TY - JOUR T1 - The Value of Plant Growth Regulators in the Propagation of <em>Vitis Champini</em> Rootstocks JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 250 LP - 253 DO - 10.5344/ajev.1980.31.3.250 VL - 31 IS - 3 AU - A. P. Chapman AU - E. E. Hussey Y1 - 1980/01/01 UR - http://www.ajevonline.org/content/31/3/250.abstract N2 - Experiments were conducted to determine the value of growth regulator treatments in rootstock rootling and benchgraft production. The difficult-to-root varieties Dog Ridge and Ramsey, derived from Vitis champini, were used.The five treatments and costs of the materials per 1,000 cuttings were as follows: 1) 24-hour soak in dilute Walter's Solution ($8A) (Australian dollars $1A = $1.10 U.S.), 2) 24-hour soak in dilute solution of I.B.A. ($3), 3) Five-second dip in concentrated solution of I.B.A. ($4), 4) Five-second dip in Seradix No. 2 dry powder ($8), and 5) Untreated control ($0).The percentage of Dog Ridge benchgrafts showing root initiation after 21 days for each of the five treatments were 100, 100, 95, 40, and 2.5%, respectively. The rooting of Ramsey hardwood cuttings after 30 days for each of the five treatments were 76, 71, 73, 61 and 33%, respectively. I.B.A. treatment reduced the rooting time by 14 days for difficult-to-root cuttings and benchgrafts. Electricity savings of 25-30% could be achieved as well as a corresponding increase in output for a given propagation facility. ER -