Botrytis
Botrytis cinerea

• 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
• Light brown oval lesions form on canes where the leaves attach, and faded brown concentric circles are often visible within the lesion
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Spur Blight
Didymella applanata

• Leaf and flower buds shrivel and die, and young fruit may fail to develop
• Brown wedge-shaped area on leaves
• Chestnut brown to purple oval lesions on young green canes where the leaves attach
• Brownish purple lesions enlarge into streaks and cover much of the cane
• 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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Fire Blight
Erwinia amylovora

• Developing berries become hard and dry
• Tips of young canes wilt, become blackened, and curl over into a “shepherd’s crook”
• Leaf veins and petioles turn black, and canes die from top down

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