CANOPY MANAGEMENT OF REJUVENATED APPLE TREES THROUGH PRUNING AND PROHEXADIONE-Ca TREATMENTS
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Date
2016
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Abstract
ABSTRACT
The present investigation entitled “Canopy management of rejuvenated
apple trees through pruning and prohexadione-Ca treatments” was carried out at Regional
Horticultural Research and Training Station, Mashobra, Shimla during the years 2015 and 2016.
Pruning treatment with no heading back-only thinning out suppressed the vegetative growth and
markedly improved the fruit set, yield and yield efficiency. It also improved red colouration and
firmness of the fruits at harvest. Heading back (25% removal of one year old growth) increased
vegetative growth and improved fruit quality in terms of size and total soluble solids. Two foliar
applications of prohexadione-Ca at a concentration of 150 ppm significantly restricted the vegetative
growth. Further, it was found to be effective in improving fruit set, yield efficiency, fruit colour and
firmness. Return bloom on the basis of blossom density was improved by combining no heading
back-only thinning out pruning cuts with two foliar applications of prohexadione-Ca at a
concentration of 150 ppm. In order to regulate vegetative growth and fruiting in rejuvenated apple
trees, the combination of no heading back-only thinning pruning cuts and two foliar applications of
prohexadione-Ca at a concentration of 125 ppm and 150 ppm can be recommended for sustainable
apple production.
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Keywords
harvesting, nitrogen, sorghum, crops, planting, yields, wastes, biological phenomena, diseases, proteins, apples,Canopy management