EFFECT OF CYCOCEL AND MEPIQUAT CHLORIDE ON PHYSIOLOGY, GROWTH AND YIELD OF IRRIGATED BT COTTON (Gossypium hirsutum L.)

G. K. KATARIA; M. D. KHANPARA

Volume : I, Issue : I, June - 2012

EFFECT OF CYCOCEL AND MEPIQUAT CHLORIDE ON PHYSIOLOGY, GROWTH AND YIELD OF IRRIGATED BT COTTON (Gossypium hirsutum L.)

G. K. Kataria, M. D. Khanpara

Abstract :

Physiology, growth and yield attributes of Bt cotton were evaluated with the application of varying doses of Mepiquat Chloride (MC) and Cycocel (CCC) during Kharif 2010. The experiment was comprised of total nine treatments with control (water spray) and laid out in Randomized Complete Block Design with replicated four times at Cotton Research Station, JAU, Junagadh. Cotton plants were sprayed with the growth regulator MC @ 50 and 70 ppm, once at 60 days after planting (DAP) or 90 DAS and CCC @ 40 and 80 ppm once at 60 DAP or 90 DAS. The results revealed that the applied Cycocel @ 40 ppm at 90 DAS had significant increased the chlorophyll content (34.44 ug/cm2) at 95 DAS, specific leaf weight SLW (929.5 mg/dm2) at 120 DAS, number of squares (108), number of bolls (58), seed cotton yield (3091 kgha 1) and one week early 50 per cent boll opening and crop mature with decreased the plant height. Therefore, PGR might be considered a component of cotton growth management to provide higher seed cotton yields.