STUDIES ON THE PLANT GROWTH REGULATOR CPPU SPRAY ON THE GROWTH AND FRUITQUALITY OF APPLE (Malus X domestica Borkh) QUALITY OF APPLE (Malus X domestica Borkh)
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Date
2015-07
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College of Horticulture, Bharsar Campus, V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
A synthetic cytokinin, Sitofex (CPPU) was applied for growth and quality of apple
in different doses (2.5, 5.0, 7.5 and 10 ppm) and timing (full bloom and pea stage)
at temperate conditions of Uttarakhand University of Horticulture and Forestry,
Bharsar above 1900 meter mean sea level. The effect was observed for yield, fruit
weight, dimensions and chemical fruit quality of Red Delicious apple. Two ideal
spray of 10 ppm sitofex after full bloom and pea stage had marked effect on fruit
setting, yield, fruit weight and dimensions, as well as chemical fruit quality. These
doses were responsible for reducing physiological weight loss and acidity in the
fruit. These effects either in increase or decrease was associated with increasing
sitofex concentrations.
The maximum fruit per branch increased 2 fold, fruit diameter 1.33 to 1.47 times,
fruit weight 75%, fruit volume 79%, total sugar 14.2%, with 10 ppm sitofex
application as compared to control. Maximum yield 37.26 kg tree-1 with 10 ppm
sitofex was superior to 2.5, 5.0, 7.5 ppm sitofex application. The yield was
minimum in control, 28.09 kg tree-1. The maximum fruit yield increased 32.65%
with sitofex application as compared to control.
These findings demonstrate the positive effects, no negative effects and most
promising commercial applications of sitofex in apple.
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