Raspberry Cane Borer
Oberea bimaculata

• Wilting may be evident at the tips of new shoots
• Two rings of punctures about ½ inch apart, and located 4-6 inches below the growing tip, are apparent where the beetle has laid eggs
• Adult is slender, ½ inch long, black, with yellow stripes and a yellow head with two black spots
• Full grown larvae are ¾ inch long, cream colored, and legless
• Adults are active in June
• Larvae can be found inside canes from mid summer through fall
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Raspberry Cane Maggot
Pegomya rubivora

• Feeding by maggots inside cane causes the young shoots to wilt
• Damage occurs in early spring
• Adult is a small, gray fly about two-thirds

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Winter Injury

• Leaves of mature canes wilt and die at the top of the cane only
• Flowering is sparse; flowers and fruit may form and fail to develop
• New canes will be healthy

Verticillium Wilt
Verticillium albo-atrum

• Leaves turn yellow and fall off from the bottom of the plant up
• Canes turn blue or have blue streaks
• 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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Crown Gall and Cane Gall
Agrobacterium tumefaciens, Agrobacterium rubi

• Wilting may be evident
• Spongy white tumor-like galls on the cane, roots, and crown
• Older galls are brown to black and hard
• Poor growth and fruit production may be seen on severely infected canes

Cane Blight
Leptospaeria coniothyrium

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

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