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: Leaf scorch on maple
Photo by: R.S. Byther
  
Maple : Leaf scorch
(revision date: 4/28/2014)


Biology
Leaf scorch on maple has many possible causes. Plants that are under stress, such as drought or heat stress, may not provide sufficient water to the leaf margins, causing the edges of the leaves to turn brown and dry. In some cases, scorch may spread to areas between veins or entire twigs may die back. Trees placed near heat-reflecting surfaces, such as buildings or pavement, often suffer from heat stress. Excessive salts from overuse of chemical fertilizers may cause leaf scorch. Scorch may also be a symptom of damage to the roots or stem.
Management Options


Non-Chemical Management
  • Irrigate during dry periods. Wet the entire root zone, but do not overwater.
  • Do not overfertilize.
  • Avoid injury to roots and trunk.
  • Soil compaction, which may be caused by heavy foot traffic or construction equipment, can prevent roots from taking up water, resulting in scorch symptoms.
  • Do not plant trees against the sunny sides of buildings or pave over the roots of established trees.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Leaf scorch on maple
Photo by: R.S. Byther