Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Viburnum > Twisted and curled leaves
Viburnum > Leaves > Twisted and curled leaves
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Downy mildew
Plasmorpha viburni
- Leaf spots are first yellow then brown
- Spots may be angular or have feathery edges depending on species of viburnum
- Fuzzy, grayish-white areas of fungal growth may be visible on underside of blotches
- Spots may join together to form large blotches.
- Young leaves may become crinkled or distorted
- In severe cases, infected leaves may fall
- More information on Downy mildews in trees and shrubs
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Snowball aphid
Ceraphis viburnicola
- Twisted, curled, distorted and cupped leaves and shoots
- Aphids can be found on underside of leaves
- Adult aphids are bluish-gray with bodies that appear to be dusted with white powder
- More information on Snowball aphid
