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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Viburnum > Twisted and curled leaves

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Viburnum > Leaves > Twisted and curled leaves

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  • Image: Black Rot 1
  • Image: Black Rot 2
  • Image: Black Rot 3

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 mildew...
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  • Image: Black Rot 1
  • Image: Black Rot 2

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...

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