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- Title
Mechanische Fruchtbehangsregulierung bei Apfel verbessert Fruchtgröße, Fruchtfestigkeit, Fruchtausfärbung und die Source: Sink - Verhältnisse mit mehr Einzelfruchtständen (Singlets) bei 'Gala'.
- Authors
Seehuber, Claudia; Damerow, Lutz; Kunz, Achim; Blanke, Michael M.
- Abstract
The objective of the MSc project was to improve fruit quality, i.e. fruit firmness, colour and size, by mechanical blossom thinning. Ten-year-old slender spindle apple cv. 'Gala, Mondial' trees at Campus Klein-Altendorf near Bonn, Germany with an intense flowering of 7-8 on the 0-9 scale were blossom-thinned on 21 April 2009; unthinned trees served as control. Rotor speeds were 360 rpm or 420 rpm at 5 or 7.5 km/h tractor speed using the new mechanical thinning device developed at the University of Bonn in 2004-2006. Therein, a vertical mast supports three horizontal rotors, whose vertically rotating tines remove excessive flowers; the device was mounted on the front three point hitch of the tractor with the following results: Overall, the positive results of a better fruit quality (size, colour and firmness) offer the potential of mechanical blossom thinning in cv. 'Gala', which is difficult to blossom-thin chemically.
- Subjects
APPLE quality; COLOR of fruit; PLANT mechanics; FRUIT morphology; FRUIT thinning; ROTATING machinery
- Publication
Erwerbs-Obstbau, 2014, Vol 56, Issue 2, p49
- ISSN
0014-0309
- Publication type
Article
- DOI
10.1007/s10341-013-0199-6