Key Features
- Stains wood inside tree
- Bright, colorful stain patterns
Symptoms
Thinning tree crown, small leaves and branch dieback are often symptoms of trees with sap streak. Problem gets progressively worse, but the sap streak symptom isn't observed until the tree is removed. All trees are susceptible to decline and dieback; sap streak can only infect maples and boxelders.
Biology
Sapstreak is a fungal disease of maples and boxelders (Acer spp). and can be a problem in a sugarbush (aka sugar maple), in areas dedicated to maple syrup production.
Management Recommendations
This disease is best managed by prevention. Avoid wounding the roots, buttress roots, crown and lower portions of the trunk.
Effective Pesticides
Pesticides are neither available nor recommended for managing this disease.
