An experiment was conducted aiming to evaluate the effect of Chlormequat Chloride (CCC) doses and application time on the wheat cultivar CEP-19. It was carried out during 1990, at the Federal University of Santa Maria on a Distrophic Read Yellow Podzolic soil. The doses applied were zero, 200, 300, 400 and 500g/ha having as source the product Tuval (10% a. i.) and 1000g/ha of the commercial product Cycocel (50% ai.) applied at growth stage 3 (tillering), 6 (first visible nod) and 8 (booting) and doses fractioning. Grain yield and harvest index increased linearly with CCC applied at tillering stage. Plant height decreased with CCC applied mainly at growth stages 3 and 6. Dose parceling did not affect plant characteristics studied or grain yields.
wheat; bio-regulator; Chlormequat chloride; CCC; Tuval; Cycocel
