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Disease management strategies for raspberry leaf spots include the use of genetically resistant raspberry plant varieties, chemical fungicide sprays, and cultural practices such as pruning and thinning out canes. Raspberries are an important fruit, mainly grown in Washington, Oregon and California.
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 ...
The disease cycle for cane blight begins when the fungus, Leptosphaeria coniothyrium, enters the vascular tissue of the canes through wounds. [4] [3] Wounds are commonly caused by pruning, but insect damage, freeze injury, or other various forms of mechanical injury can also be points of entry.
When pruning limbs off large shade trees, use the three-step approach. The first cut should be from below and 15 or 18 inches out from the trunk. Cut up 1/4-way into the bottom of the branch (not ...
Raspberry spur blight is caused by the fungus Didymella applanata. [2] This plant pathogen is more problematic on red raspberries (Rubus idaeus) than on black or purple raspberries. The fungus infects the leaves first and then spreads to the cane. It causes necrotic spots on the cane near the base of the petiole attachment. [3]
Rubus phoenicolasius (Japanese wineberry, [2] wine raspberry, [3] wineberry or dewberry) is an Asian species of raspberry (Rubus subgenus Idaeobatus) in the rose family, native to China, Japan, and Korea. The species was introduced to Europe and North America as an ornamental plant and for its potential in breeding hybrid raspberries.
Roses should be pruned at least once a year. Main pruning should be done in late winter or early spring, focusing on removing dead, diseased, or damaged canes.
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