Redwood Branch Canker
A fungal disease affecting all redwood species (Sequoia, Sequoiadendron, Metasequoia) that causes purple spots on needles and cankers that girdle twigs. Most susceptible are trees grown outside their native environment.

Identification & Symptoms
What to Look For
Potential Damage
Lifecycle
Spores spread from infected leaves or twigs by rain splash during early wet spring rains or fog. Also dispersed by wind. Spores penetrate needles through stomata. Fungus moves from leaf to twig causing cankers. Overwinters as mycelium in infected tissues.
Professional Treatment Approach
Remove and destroy infected needles and twigs
Improve air circulation around trees
Avoid overhead watering
Apply appropriate fungicides during susceptible periods
Correct phosphorus deficiencies
Reduce tree stress factors
Recommended Mauget Products
Fungisol
Professional-grade treatment specifically effective against redwood branch canker.
View Product DetailsMycoject Ultra
Professional-grade treatment specifically effective against redwood branch canker.
View Product DetailsNeed Professional Diagnosis?
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