DiseaseHigh Severity

Cedar Branch Canker

Seridium cardinale, Coryneum berckmanii

A serious fungal disease complex affecting cypress, cedar, and arborvitae species. Multiple pathogenic fungi cause branch cankers and twig blight, with disease development closely tied to environmental stress and weather conditions.

Peak Season: Initial infection: Moist spring weatherSymptom appearance: Most noticeable in springDisease progression: Continues through growing seasonEnvironmental factor: Hot, dry summers accelerate development
View Treatment OptionsRecommended Products
Cedar branch canker symptoms

Identification & Symptoms

What to Look For

Yellowing or browning of foliage on individual branches
Small branches becoming reddish-brown and dropping
Larger limbs developing girdling cankers
Black pustules (acervuli) on affected twigs
Gray discoloration of foliage
Dead twigs accumulating at base of tree
Gummy ooze at canker sites

Potential Damage

Progressive branch dieback starting from upper crown
Girdling cankers on twigs and scaffold branches
Complete tree mortality in severe cases
Structural weakness from repeated infections
Aesthetic damage from foliage discoloration

Lifecycle

Infection occurs during moist spring weather. Acervuli produce spores that spread to lower branches via windblown rain, fog, birds, and insects. Repeated cycles of infection lead to progressive tree decline and eventual death.

Professional Treatment Approach

1

Fungisol applications during early spring before spore release

2

Remove and destroy infected branches and debris

3

Improve tree vigor with appropriate fertilization programs

4

Sanitize pruning tools between cuts to prevent spread

5

Focus treatments on valuable specimen trees

Recommended Mauget Products

Fungisol

Professional-grade treatment specifically effective against cedar branch canker.

View Product Details

Need Professional Diagnosis?

Our certified arborists can help you accurately identify tree problems and develop an effective treatment plan using Mauget's proven injection systems.

Schedule ConsultationUse Diagnostic Tool