HortScience 26:993–999īlanke MM (2008) Alternatives to reflective mulch cloth (Extenday TM ) for apple under hailnet? Sci Hortic 116:223–226īuler Z, Mika A (2009) The influence of canopy architecture on light interception and distribution in ‘Sampion’ apple trees. HortScience 22:402–405īarritt BH, Rom CR, Konishi BJ, Dilley MA (1991) Light level influences spur quality and canopy development and light interception influences fruit production in apple. J Am Soc Hortic Sci 99:547–551īarritt BH, Rom CR, Guelich KR, Drake SR, Dilley MA (1987) Canopy position and light effects on spur, leaf, and fruit characteristics of ‘Delicious’ apple. Therefore, summer pruning and the installation of reflective film helps light penetration in excessively tall spindle trees and improves fruit quality in a high-density apple production system.īarden JA (1974) Net photosynthesis, dark respiration, specific leaf weight and growth of young apple trees as influenced by light regime. Moreover, this treatment increased leaf photosynthetic activity, specific leaf weight, and flower bud diameter. The SP + RF treatment increased size, color, and soluble solids content in fruits from the lower parts of the canopy. The SP + RF treatment improved the overall light availability throughout the canopy and increased the amount of light by approximately 25% in the lower parts of the canopy compared to that in the UC group. ![]() We measured light distribution, diameter of flower buds, fruit quality, and leaf physiological characteristics at different parts of the canopy of trees that were treated with summer pruning (SP) and the installation of reflective film (RF), compared to those allowed to maintain their dense canopies (unpruned control UC). ![]() To minimize this effect, we used the ‘Hongro’ cultivar to examine the effect summer pruning and installation of reflective film had on fruit size and quality in the lower canopy. While some growers in Korea let apple trees grow up to 4 m or higher in high-density planting systems with M.9 rootstock to produce more fruits, such practices lead to very tall trees with low-quality fruit that develop in the lower canopy. Tall spindle planting systems achieve high-quality fruit from plants that flower early and sustain a high yield.
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