ISHS Acta Horticulturae 262: V International Symposium on Rubus & Ribes
TEMPERATURE INFLUENCE ON HARVEST DATE AND CANE DEVELOPMENT OF PRIMOCANE-FRUITING RED RASPBERRIES. |
| Authors: | E. Hoover, J. Luby, D. Bedford, M. Pritts, E. Hanson, A. Dale, H. Daubeny |
| Abstract:
The influence of temperature on timing of harvest and cane development in primocane-fruiting red raspberry cultivars 'Heritage' and 'Redwing' was investigated. Temperature records, and dates of first and peak harvest were collected in Minnesota, New York, Michigan, Ontario, and British Columbia. British Columbia and New York began harvesting 'Heritage' before 'Redwing' while in the remaining locations, harvest of 'Heritage' began after 'Redwing'. Environmental factors of latitude and heat unit accumulation do not explain the differences in harvest date between the different cultivars and locations. In Minnesota, parameters of cane height, and cumulative yield were collected. Cane height correlated to accumulated heat units for both cultivars. However, the differences in yield over years for each cultivar is not due to differences in accumulation of heat units. Cane height may be influenced by changing the pattern of heat unit accumulation, but altering the accumulation of heat units will not necessarily alter the timing of harvest. | |
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