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Blackberries and raspberries (excluding red raspberries, which have a different growth habit and pruning schedules) should have their fruit-bearing canes tip-pruned back in late winter to control ...
A raspberry leaf spot infection initially causes dark green circular spots on the upper side of young leaves, which will eventually turn tan or gray. [3] These spots are typically 1–2 millimetres (0.039–0.079 in) in diameter, but can get as big as 4–6 millimetres (0.16–0.24 in). [4]
Rubus odoratus, the purple-flowered raspberry, [2] [3] flowering raspberry, [3] or Virginia raspberry, is a species of Rubus, native to eastern North America, from Nova Scotia west to Ontario and Wisconsin, and south along the Appalachian Mountains as far as Georgia and Alabama.
A raspberry is an aggregate fruit, developing from the numerous distinct carpels of a single flower. [4] What distinguishes the raspberry from its blackberry relatives is whether or not the torus (receptacle or stem) "picks with" (i.e., stays with) the fruit.
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Rubus deliciosus is a deciduous shrub or vine growing to 1.5 m (5 ft), rarely 3 m (10 ft), with arching stems. Unlike many species of Rubus, the flowering stems are perennial.
The raspberry spur blight fungus spreads through the pycniospores that are released from the pycnidia. The spores are released and infect other raspberry plants with the help of rain through open wounds or natural openings. [7] The fungus will then spread throughout the plant and will live in lesions during the winter to survive.