A field experiment was conducted to study the effect of foliar spray of Mepiquat Chloride (MC) (25, 37.5 and 50 ppm), Chlormequat Chloride (CCC) (375 and 500 ppm) at 45 and 90 DAS and NAA (20 ppm) at 90 DAS on growth, yield, morphological, physiological and biochemical parameters of hybrid cotton (DHH-11). Application of NAA (20 ppm) was found to be most effective in increasing plant height, dry weight, rate of photosynthesis and seed cotton yield. MC treatment (50 ppm) sprayed at 90 DAS was found to be effective than CCC in reducing plant height, leaf area and showed higher photosynthesis which resulted in higher yield and boll weight. Application of growth retardants at early stage (45 DAS) reduced seed cotton yield significantly compared to other treatments.
Growth regulators, hybrid cotton, seed cotton yield
