TY - JOUR T1 - Effect of Succinic Acid-2,2-Dimethylhydrazide and (2-Chloroethyl) Trimethylammonium Chloride on Shoot Growth of 'Tokay' Grapes JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 223 LP - 226 DO - 10.5344/ajev.1971.22.4.223 VL - 22 IS - 4 AU - Robert J. Weaver AU - Robert M. Pool Y1 - 1971/01/01 UR - http://www.ajevonline.org/content/22/4/223.abstract N2 - The plant-growth retardants CCC [(2-chloroethyl) trimethylammonium chloride] and Alar (succinic acid-2,2-dimethylhydrazide), in concentrations of 1,000 to 6,000 ppm, retarded elongation of young 'Tokay' shoots, with CCC the more effective. Both compounds inhibited the length of young internodes more than that of older internodes. Alar at 1,000 ppm induced some growth stimulation of young internodes until 14 to 20 days after treatment. CCC at higher concentrations slowed leaf growth, whereas Alar usually stimulated it. When a solution containing potassium gibberellate (KGA3) at 100 ppm and CCC at various concentrations was applied to the shoots, the KGA3 completely overcame the CCC-induced inhibition. Applications of KGA3 could not fully overcome the inhibition of shoot growth induced by Alar at concentrations of 2,000 ppm or higher. ER -