Effect of Sea Weed (Sargassum WightII) Extract, 6-BA, Chemical Nutrients and Prunning on Vegetative Growth Cycle of Mango (Mangiffera Indica L.) CV. Kesar

By : J Shankaraswamy, R S Chovatia

Page No: 107-111

Abstract
A field experiment was conducted to study the effect of different levels of sea weed extract, growth regulators, pruning along with and without urea spray and chemical nutrients on pattern of vegetative flushing episodes and growth pattern of May-June, July-August and September-October flush in order to regulate the growth and health of plant and in turn to enhance blooming flushes yield in Kesar mango. The trial was conducted over two years from 2010 to 2012 on 16 years old Kesar mango trees. The selected shoots of mango Cv. Kesar were pruned back by 10cm with 2 percent urea spray during last week of May i.e. after harvest, The different doses of Paclobutrazol (@ 5g.a.i, 7.5g.a.i) was soil drenched and 6-BA (100 & 200ppm), sea weed extract (3 & 5 percent), KNO3 (4 & 6 percent) and CaNO3 (4 & 6 percent) foliar spray efficacy on morphological characteristics of growth cycles (flushing episodes) was evaluated. 6-BA (100 ppm) exhibited maximum summer flush (MayJune). However lower Sept-Oct flushing was achieved with PP333 (@ 7.5g.a.i) followed by 6-BA (200 ppm) and Sea weed Extract (5 & 3 percent). CaNO3 (6 percent) exhibited maximum mean length of flush, Sea weed Extract (3 percent) exhibited the minimum number of days for flush emergence and complete extension of vegetative growth with maximum number of flushes per shoot and maximum number of leaves per shoot with 6-BA (100 ppm). P333 (Cultar), 6-BA and Sea weed extract showing promising effect in reducing the September-October vegetative flush which have detrimental effect near flowering time.

Authors :
J Shankaraswamy and R S Chovatia : Department of Horticulture, Junagadh Agricultural University Junagadh -362001, Gujarat