Spur Blight
Didymella applanata

• Brownish purple lesions enlarge into streaks and cover much of the cane
• Brown wedge-shaped area on leaves
• Chestnut brown to purple oval lesions on young green canes where the leaves attach
• Leaf and flower buds shrivel and die, and young fruit may fail to develop
• As diseased canes mature, the outer layer dries out and becomes silvery. Cracked, tiny black dots can be seen on the silvery epidermis

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Cane Blight
Leptospaeria coniothyrium

• Dark streaks on cane, always around a wound
• Shoots wilt and die as fruit develops

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Verticillium Wilt
Verticillium albo-atrum

• Canes turn blue or have blue streaks
• Leaves turn yellow and fall off from the bottom of the plant up
• Reddish brown streaks may be seen in the center of infected canes if bark is peeled away
• Black raspberries die in 1-3 years
• Red raspberries may survive many years but with reduced vigor
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Botrytis
Botrytis cinerea

• Light brown oval lesions form on canes where the leaves attach, and faded brown concentric circles are often visible within the lesion
• Flowers are brown to black and dry out
• Gray powdery spores cover part or all of the infected fruit under moist conditions
• Infected fruit may remain attached as shriveled, dried, black “mummies”
• Disease favored by wet conditions and temperatures between 41-86° F
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Anthracnose
Elsinoe veneta

• Small purple spots on young green canes (up to ¼ inch), and centers turn gray with age
• In late fall infected stems develop the characteristic hard and crusty “gray bark”
• Small spots (1/16 inch) on leaves, white to gray center with purple borders
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