Studies on the effect of growth regulators on flowering, fruiting & quality of sapota (Manilkara zapota)
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Date
2019
Authors
Akshay
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
The present study entitled, “Studies on the effect of growth regulators on flowering, fruiting &
quality of sapota (Manilkara zapota)” was conducted at Experimental Orchard of COA, Kaul, (Kaithal),
CCS HAU, Hisar (Haryana) during 2018 and 2019 on twenty eight years old sapota trees with the objective
to study the effect of growth regulators on the fruit set, yield and quality of sapota. The experiment was laid
out in Randomized Block Design replicated thrice to study the effect of CCC 400ppm at fruit bud
differentiation in July and followed by other growth regulators (GA3 100, 150 ppm and NAA 100, 200, 300
ppm) at 50% flowering and again at pea stage of fruit development over control. Percent increase in plant
height (5.69 %), stem girth (1.91 %), tree spread E-W (8.64%) and N-S (8.68%) considerably increased
with application of growth hormones maximum increase was observed in CCC 400 ppm superimposed by
GA3 150 ppm and NAA 300 ppm. Minimum no of days to flower (23 days), days to fruit setting (34 days),
days to maturity (218 days) was observed in CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm.
Maximum number of flower per cluster (12.56), fruit setting (46.74 %) and fruit retention (21.25 %) and
no. of fruit per cluster (3.87) was recorded with application of CCC 400 ppm followed by GA3 150 ppm
and NAA 300 ppm. Maximum fruit length (6.01 cm), fruit diameter (5.42 cm) and fruit weight (97.65 gm)
and minimum number seed (1.00) was observed with application of CCC 400 ppm followed by GA3 150
ppm and NAA 300 ppm. Maximum number of fruit per tree (1316.00) and yield per tree (128.86 kg) was
recorded with treatment of CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm. Highest increase
in TSS (22.3 %), total sugars (14.83 %), reducing sugars (8.90 %), non reducing sugars (5.93 %) and
significant decrease in acidity (0.12 %) was obtained with application of CCC 400 ppm superimposed by
GA3 150 ppm and NAA 300 ppm.
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