Journal of Horticulture

Journal of Horticulture
Open Access

ISSN: 2376-0354

Michael Blanke

Department of Horticultural Sciences, University of Bonn, Bonn, Germany

  • Research Article   
    Effect of Crop Load Management by Blossom Thinning or cluster Leaf Removal on Apple Quality and Alternate Bearing
    Author(s): Prud Netsawang*, Peter Schulze Lammers, Achim Kunz and Michael Blanke

    The influence of Crop Load Management (CLM) on fruit quality, yield, and alternate bearing was assessed by comparing three methods of modifying the source: sink relationship: a) Mechanical, b) Chemical and c) Manual thinning. A total of 450 apple trees (Malus domestica Borkh., cv. ‘Roter Boskoop’; six years old) on M9 rootstock at the Klein-Altendorf field laboratory (50°N) of the university of Bonn, Germany were used. Trees were mechanically blossom-thinned at the balloon stage (BBCH 59) with a rotor speed of 320 rpm or 380 rpm at 5 km/h tractor speed or were chemically thinned at full bloom stage (BBCH 65) with Ammonium Thiosulfate (ATS), Ethephon (ETH), and/or 6-Benzyl Adenine (BA) at 10-12 mm fruit size (BBCH 71) after applying ATS/ETH. Flower clusters and/or cluster leaves were manually removed to determine the optimum sink-source rat.. View More»
    DOI: 10.35248/2376-0354.23.10.001

    Abstract HTML PDF

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