EFFECT OF DIFFERENT CONCENTRATIONS AND TIMINGS OF GA4+7+BA APPLICATION ON FRUIT SET, QUALITY AND RUSSET CONTROL OF APPLE (Malus × domestica Borkh.) cv. RED VELOX
Loading...
Date
2022-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Effect of different concentrations and timings of GA4+7+BA
application on fruit set, quality and russet control of apple (Malus × domestica Borkh.) cv. Red Velox” was
carried out at Regional Horticulture Research and Training Station Mashobra, Shimla during 2021-22. The experiment
was laid out in a Randomized Block Design with eighteen treatments replicated three times. The experimental plants
were planted at the spacing of 2.5 ×1.0 m. The observations on various parameters of growth, flowering, fruiting, fruit
quality and biochemical parameters were recorded during the period of investigation. The results of present study
revealed that different treatments of GA4+7 + BA had a significant effect on fruit quality, set and russet control. The
maximum annual shoot growth and leaf area was recorded in plants treated with GA4+7 + BA @ 10ppm. Maximum
return bloom was observed in plants treated with GA4+7 + BA @ 1ppm. The plants treated with GA4+7 + BA @
5ppm has maximum fruit set percentage. Maximum fruit retention was observed in plants treated with GA4+7 +
BA @ 10ppm. Total yield was maximum in treatment GA4+7 + BA @ 7.5ppm. Plants treated with GA4+7 + BA
@ 2.5ppm had maximum yield efficiency. The plants treated with GA4+7 + BA @ 10ppm had maximum fruit
size, fruit weight, fruit volume and fruit firmness. L/D ratio was maximum with GA4+7 + BA @ 25ppm
treatment. Russet percentage was minimum when plants were treated with GA4+7 +BA @ 10ppm whereas, the
maximum was reported in control. Maximum TSS was observed in plants treated with GA4+7 + BA @ 5 ppm
treatment. Titratable acidity was maximum in GA4+7 + BA @ 1 ppm treatment. Total sugars were maximum at
GA4+7 + BA @ 5ppm. Maximum reducing sugar was observed in plants treated GA4+7 + BA @ 10ppm and nonreducing
sugar was maximum with GA4+7 + BA @ 2.5ppm treatment. Plants treated withGA4+7 + BA @ 2.5ppm
had maximum ascorbic acid content. Thus, taking the concentrations and timings of GA4+7 + BA into
consideration, GA4+7 + BA @ 10ppm at petal fall and two times later at ten days interval can be recommended
for improving fruit quality and reducing russet formation in apple cv. Red Velox.