Growth Responses to Rates and Timing of Plant Growth Regulators On New Deltapine Cotton Varieties

Plant growth regulators (PGRs) are generally used to control excessive vegetative growth in cotton, Gossypium hirsutum L.  PGRs were applied on current and new Deltapine cotton varieties to evaluate growth response across the Midsouth and Southeast.  Treatment levels were 1) control 0 oz/a; 2) 4 oz/a early square; 3) 8 oz/a early square; 4) 16 oz/a early square; 5) 4 oz/a early bloom; 6) 8 oz/a early bloom; 7) 16 oz/a early bloom; 8) 8 oz/a early square + 8 oz/a early bloom; 9) 8 oz/a early square + 16 oz/a early bloom; 10) 16 oz/a early square + 16 oz/a early bloom.  Plant height measurements were taken between cutout and harvest to determent varietal response to PGR applications and timings.