Archives

Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 4
First page : (499) Last page : (508)
Article doi: : http://dx.doi.org/10.18782/2582-2845.8306

Influence of Plant Growth Regulators on Flowering, Fruiting, Yield and Quality of Sapota [Manilkara zapota (L.) P. Royen] cv. Cricket Ball

Akshay¹, Devender Chaha^2*, Mandeep Rathee³ and Dinesh^4
2*Associate Professor, Krishi Vigyan Kendra, Ambala City - 134003, Haryana
¹M.Sc. Student, Dept. of Horticulture, CCSHAU, Hisar-125004, Haryana
³Training Assistant, Krishi Vigyan Kendra, Kaithal - 136027, Haryana
⁴Junior Pedologist, Dept. of Soil Science, CCSHAU, Hisar - 125004, Haryana
*Corresponding Author E-mail: devenderchahal@rediffmail.com
Received: 6.07.2020  |  Revised: 13.08.2020   |  Accepted: 19.08.2020 

 ABSTRACT

The present studies were conducted at Students Experimental Orchard of College of Agricultre, Kaul, (Kaithal), CCS Haryana Agricultural University, Hisar (Haryana) during the fruiting season of year 2018-19 on twenty-eight years old sapota [Manilkara zapota (L.) P. Royen] trees to evaluate the effect of plant growth regulators (PGRs) on flowering, fruit set, yield and quality of fruits. The experiment was laid out in Randomized Block Design with seven treatments replicated thrice to study the effect of CCC (cycocel) 400 ppm sprayed at floral bud differentiation (FBD) stage in July followed by the combinations of other two growth regulators viz., GA3 (100 and 150 ppm) sprayed at 50% flowering stage and NAA (100, 200 and 300 ppm) sprayed at pea stage of fruit development over the control (only water spray). The different treatment combinations of these three PGRs significantly influenced all the vegetative as well as reproductive (including fruit yield and quality) parameters and performed better than the control. Among different combinations, the application of CCC (cycocel 400 ppm) superimposed with spray of GA3 (150 ppm) and NAA (300 ppm) was found superior and resulted in maximum increase in plant height (5.69%), stem girth (1.91%) and plant spread (8.64% in E-W and 8.68% in N-S direction), along with maximum number of flowers per cluster (12.56), percentage fruit setting (46.74%), percentage fruit retention (21.25%), number of fruits per cluster (3.87), number of fruits per tree (1,316), yield per tree during the first picking (35.20 kg), second picking (55.83 kg), third picking (37.85 kg) and total yield of three pickings (128.88 kg). In addition to these, the maximum fruit length (6.01 cm), diameter (5.42 cm), weight (97.65 g), TSS content (22.3%), total sugar (14.83%), reducing sugar (8.90%) and non-reducing sugar (5.93%), and the minimum days taken to flowering (23 days), fruit setting (34 days), fruit maturity (218 days) and minimum acidity (0.12%) as well as number of seeds per fruit (1.00) were also obtained with the application of above mentioned combination [i.e. CCC 400 ppm fbs (followed by spray of) GA3 150 ppm fbs NAA 300 ppm], and  it was closely followed by the combination  of CCC 400 ppm fbs GA3 100 ppm fbs NAA 300 ppm in most of  the vegetative, floral and fruiting  parameters and by the combination of CCC 400 ppm fbs GA3 150 ppm fbs NAA 200 ppm in most of  the fruit quality and yield reproductive parameters. Overall, the application of CCC (400 ppm) at FBD stage followed by the combinations of other two PGRs viz., GA3 (100 and 150 ppm) sprayed at 50% flowering stage and NAA (200 and 300 ppm) sprayed at pea stage of fruit development proved highly effective in enhancing the yield and quality of cv. Cricket Ball of sapota fruit crop.

Keywords: Manilkara zapota, Cricket Ball, Plant growth regulators (CCC, NAA, GA3), Growth, Yield, Quality

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Akshay, Chahal, D., Rathee, M., & Dinesh (2020). Influence of Plant Growth Regulators on Flowering, Fruiting, Yield and Quality of Sapota [Manilkara zapota (L.) P. Royen] cv. Cricket Ball, Ind. J. Pure App. Biosci. 8(4), 499-508. doi: http://dx.doi.org/10.18782/2582-2845.8306