Bioefficacy of paclobutrazol on growth, flowering, fruiting and yield attributes of mango cv. Dashehari under Pantnagar agro-climatic condition
The investigation was carried out to find out the bioefficacy of paclobutrazol on regular bearing of mango cv. Dashehari. Paclobutrazol was applied as soil drench around the tree trunk @ 15ml, 20ml, 25ml, 30ml, 35ml, 60ml and 30ml (ES)/ tree along with control. There was significant variations observed in growth, flowering, fruiting, yield and quality attributes due to different doses of paclobutrazol. Treatment T4 (paclobutrazol 30ml/tree) was found superior with respect to yield and quality parameters. It was found to reduce vegetative growth and increase flowering, fruit set, fruit retention, yield attributes, TSS, sugars, ascorbic acid and β carotene content. Therefore, it is finally recommended that paclobutrazol @ 30 ml/ tree should be applied for getting maximum fruit yield without affecting the fruit quality
Anusuya R, Vijayakumar RM, Srividhya S & Sivakumar R. 2018. Comparison of physiological and flowering parameters of main and off season by using different plant nutrients and growth hormone in mango (Mangifera indica L.) cv. Bangalora. Journal of Agriculture and Ecology, 5: 76-82.
Bagel BS, Tiwari R, and Gupta N. 2004. Effect of cultar and NAA on flowering and fruiting of mango (Mangifera indica L.) cv. Langra. South Indien Horticulture, 52(1/6): 302-304.
Burondkar MM & Gunjate RT.1991. Regulation of shoot growth and flowering in Alphonso mango with paclobutrazol. Acta Horticulture, 291: 79-82.
Gora JS, Singh VK, Sarolia DK, Kumar K, Rajkumar & Bhati V. 2017. Performance of mango (Mangifera indica L.) monoembryonic and polyembryonic seedlings under salt stress condition. International Journal of Current Microbiology and Applied Science, 6(6): 3051-3056.
Khader, SESA.1990. Control of tree height, trunk girth, shoot growth and total assimilation in young grafted mango tree by paclobutrazol. Indian Journal of of Horticulture, 48: 112-115.
Kulkarni VJ.1998. Chemical control of tree vigor and the promotion of flowering and fruiting in mango (Mangifera indica L.) using paclobutrazol. Journal of Horticulture Science, 63: 557-566.
Kumar A.1999. Effect of paclobutrazol on growth, flowering, fruiting and yield of Mango cultivars. Thesis, Doctor of Phylosophy (Horticulture) G.B. Pant University of Agriculture and Technology, Pantnagar.
Kumar K, Srivastav M, Singh SK & Vinod 2016. Ascertaining hybridity of progenies in mango (Mangifera indica L.) using microsatellite (SSR) markers. Journal of Agriculture and Ecology, 2: 1-10.
Kumar K. 2015. DNA marker-based differentiation of zygotic and nucellar seedlings and identification of polymorphic microsatellite markers among parental mango genotypes. Thesis, Doctor of Phylosophy (Horticulture) submitted to ICAR- Indian Agricultural Research Institute, Pusa, New Delhi.
Kurian RM & Iyer CPA.1993. Chemical regulation of tree size in mango (Mangifera indica L.) cv. Alphonso. II. Effects of growth retardants on flowering and fruit set. Journal of Horticulture Science, 68(3): 355-360.
Narvariya SS, Dhami V, Singh CP & Kumar K.2015. Efficacy of Cultar on growth, flowering and yield behavior of mango (Mangifera indica L.) cv Dashehari. Environmental Ecology, 33(2A): 827-831.
Oosthuyse SA & Jacobs G.1997. Effect of soil applied paclobutrazol on fruit retention, fruit size, tree yield and tree revenue in Sensation and Tommy Atkins mango. South African Mango Growers' Association Yearbook, Vol.17, 57-62.
Pandey SN & Dinesh MR.2010. Mango, Indian Council of Agricultural Research, New Delhi. p 30, 97.
Rai N & Bist LD.1992. Effect of soil and foliar applied paclobutrazol on vegetative growth, flowering, fruit set and yield of oriental pear (Pyrus pyrifolia (Burm) nakai). Scientia Hortulture, 50: 153-158.
Rajkumar M, Reddy YN, Chandrasekhar R & Srihari D.2007. Studies on the effect of foliar application of chemicals and groth regulators on the fruit yield of unpruned mango (Mangifera indica L.) trees cv. Baneshan. The Orissa Journal of Horticulture, 3, 2: 44-47.
Ram RB, Vismil RS & Lal B.2005. Effect of pruning severities and paclobutrazol on bearing behaviour of rejuvenated mango trees cv. Dashehari. New Agriculturist, 16:1/2, 1-9.
Sarkar SK, Gautham B, Srihari D & Seethambaram Y.1998. Regulation of tree vigour in mango. Indian Journal of Horticulture, 55,1: 37-41.
Singh DB & Ranganath HR.2006. Induction of regular and early fruiting in mango by paclobutrazol under tropical humid climate. Indian Journal of Horticulture, 63: 248-249.
Singh DK, Ram S.1998. Effect of time of paclobutrazol application on fruit quality of mango. Indian Agriculturist, 42: 121-126.
Singh NP, Malhi CS & Sharma RC.2005. Effect of plant bio regulators (PBRs) on flowering, fruit yield and quality in mango cv. Dashehari. Horticultural-Journal, 18(1):10-12.
Singh VK & Singh A.2003. Effect of paclobutrazol on regularity of bearing in mango (Mangifera indica L.). Physiollogy, Molecular and Biology of Plants 9(2): 239-248.
Vijaylakshmi D & Srinivasan PL.2000. Improving the quality attributes of ‘off’ year Alphonso mango through chemicals and growth regulators. The Orissa Journal of Horticulture, 28(1):31-33.
Wood BW.1984. Influence of paclobutrazol on selected growth and chemical characteristics of young pecan seedlings. Horticulture Science, 19: 837-839.