ISHS Acta Horticulturae 112: Symposium on Breeding and Machine Harvesting of Rubus
WINTERHARDINESS AND PRODUCTIVITY OF THE RED RASPBERRY IN FINLAND |
| Authors: | J. Säkö, H. Hiirsalmi |
| Abstract:
The raspberry is grown in Finland between 60° and 65° latitudes. It is rather a demanding plant and needs favourable climatic sites for satisfactory production. It is often subject to frost injuries. The canes and buds are easily damaged in winter. Most Scandinavian and Central European cultivars are not winterhardy. The Canadian cultivars, Muskoka and Ottawa, due to their winterhardiness, have been the most reliable, though in cropping they are no more than average. An important factor in the winterhardiness of the raspberry is how early in the autumn the canes ripen and the buds enter dormancy, following the termination of which they will be capable of resuming growth. A significant positive correlation was found to exist between the early ripening of canes and winterhardiness. The native selections start their defoliation and dormancy earlier, and also overwinter better than cultivars. | |
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