Abstract
SummaryTen apple cultivars (Malus domestica Bork) Ein Shemer, Anna, Rome Beauty, Tropical Beauty, Alexander, Orleans, Winter Banana, Black John, Starking Delicious and Red Delicious were evaluated for their suitability for tropical Zambian conditions. Winter Banana, Black John, Starking Delicious and Red Delicious, which were mostly high-chill cultivars, showed poor vegetative development: delayed budbreak, shoot growth and progressive loss of vigour and most of the trees died before maturity. Of the remaining low-chill cultivars, ‘Ein Shemer’ had the highest fruit yield at 49 6 2.3 kg tree21 and ‘Alexander’ the lowest (5.3 6 1.0 kg tree21). This response was due to the high number of fruits per tree, ‘Ein Shemer’ had up to 907 6 83.7 per tree whereas low yielding cultivars like ‘Rome Beauty’ and ‘Tropical Beauty’ had fewer than 106 6 25.3 fruits per tree. The individual fruit weight was inversely related to the total number of fruits per tree. It ranged from 58 6 5.1 g in Ein Shemer to 191 6 24.8 g in ‘Rome Beauty’.
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