WSU Extension

Hortsense

Maple
 
Disease
Anthracnose 
Bacterial leaf spot and dieback 
Fasciation 
Leaf scorch 
Nectria canker 
Phyllosticta leaf spot 
Powdery mildew 
Tar spots 
Verticillium wilt 
Insect
Aphids 
Cottony maple scale 
Maple bladdergall mite 



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Caption: Verticillium wilt on maple
Photo by: R.S. Byther
  
Maple : Verticillium wilt
(revision date: 4/28/2014)


Biology
Verticillium wilt is caused by a soilborne fungus. It infects plants via the roots and then spreads throughout the plant. Symptoms on the aboveground portion on the plant include suddenly wilted yellow or brown foliage which hangs on the branches. Symptoms of infection are often on only one side of the tree or scattered throughout the canopy, but may not be noticed until warm weather or other periods of stress. Infected maples may display greenish to black streaks when cuts are made into the wood and often develop long cankers on trunk or limbs. Infected plants may be killed or may tolerate infection for several seasons.
Management Options


Non-Chemical Management
  • Prune and destroy infected limbs. Disinfect pruning tools after use.
  • Plant tolerant maple varieties in infected soil. Acer platanoides 'Jade Glen' and A. platanoides 'Parkway' are reported to be tolerant of Verticillium wilt. For information on other resistant plants, contact your county Extension agent or WSU Master Gardeners.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Verticillium wilt on maple
Photo by: R.S. Byther
Caption: Verticillium wilt on maple twigs
Photo by: R.S. Byther
Caption: Verticillium wilt on maple
Photo by: R.S. Byther
Caption: Vascular discoloration from Verticillium wilt on maple
Photo by: C.R. Foss