Delay of raspberry harvesting season with successive primocane pruning
Primocane raspberry yield depends on weather conditions in summer when especially high summer temperatures cause sunburn damage on fruits and drying of the inflorescence. We aim to delay the harvest season at Amira and Polka cultivar, with pruning of the first primocanes back to the ground. We removed green shoots on April 25th, May 8th and May 15th, 2017 and compared the vigour of the plant, the beginning of harvesting and yield to unpruned control. Pruning period had a significant influence on the beginning of harvesting at both cultivars. Harvesting of Amira was delayed for 24 days due to the earliest pruning, 36 days due to middle pruning and 39 days at the latest pruning. Harvesting of Polka cultivar has been delayed for 24, 36 and 62 days, depends on the pruning date. There was no correlation between the length of canes and yield.
Koron, D. and Weber, N. (2019). Delay of raspberry harvesting season with successive primocane pruning. Acta Hortic. 1265, 221-224
climate change, late harvesting, yield, plant vigour