Extension > Garden > Diagnose a problem > What's wrong with my plant? > Fruit > Blueberry > Spots, blotches or rings on leaves
Blueberry > Leaves > Spots, blotches or rings on leaves
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Anthracnose
- Reddish-brown round to irregular spots on leaves
- Berries become soft and wrinkled from the blossom end
- Salmon to orange colored sticky spore masses develop on infected berries and stems when wet
- Infected twigs/canes have dark brown lesions with raised bumps arranged in concentric circles
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Powdery Mildew
Microsphaeria alnia var. vacinii
- Leaves may be reddish green, have red spots or red rings
- Powdery white fungal growth may be seen in spots, covering the upper surface of the leaf, or not at all
- Leaves may be cupped or distorted around infections
- Infected leaves fall off prematurely
- Often seen mid to late summer
- More information on Powdery Mildew
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Botrytis Blight/Gray Mold
Botrytis cinerea
- Leaves have brown, irregular lesions and may become distorted
- Infected blossoms turn brown and become covered with a fuzzy gray mold
- Berries are covered with a fuzzy gray mold
- Twigs turn brownish-black and become gray
- More information on Botrytis Blight/Gray Mold
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Mummy Berry
Monilinia vaccinii-corymbosi
- In spring, new leaves turn brown along the veins and wilt
- Young shoots bend into a shepherd's crook
- Infected berries appear pinkish tan and feel rubbery
- Berries eventually become whitish gray, shriveled, and drop off
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Ringspot Virus
- Leaves may be mottled pale green and yellow, and distorted
- Brown spots may be seen on leaves and stems
- Plants have poor growth and yield
- Plants eventually die, often after a hard winter
- More information on Ringspot Virus
