DiseaseMedium Severity

Alder Ceratocystis Canker

Ceratocystis fimbriata

A serious vascular disease that affects alder trees, causing cankers, branch dieback, and eventual tree death. The fungus blocks water transport and creates characteristic canker formations.

Peak Season: Most active in spring during warm, rainy weather at bud break. Spore release occurs during wet periods.
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Ceratocystis canker showing characteristic dark, sunken lesions and vascular staining in alder tree tissue

Identification & Symptoms

What to Look For

Dark, sunken cankers on trunk and branches
Wilting and yellowing of foliage
Branch dieback starting from infection points
Dark streaking in wood tissue
Crown thinning and decline

Potential Damage

Progressive branch and trunk cankers
Vascular blockage leading to wilting
Structural weakness at canker sites
Complete tree mortality in severe cases

Lifecycle

The fungus spreads through wounds, insect vectors, and contaminated tools. Spores are produced in fruiting structures on infected tissue.

Professional Treatment Approach

1

Remove infected branches below visible symptoms

2

Apply fungicidal treatments to wounds

3

Improve tree vigor through proper nutrition

4

Sterilize pruning tools between trees

5

Remove severely infected trees

Recommended Mauget Products

Fungisol

Professional-grade treatment specifically effective against alder ceratocystis canker.

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Abasol

Professional-grade treatment specifically effective against alder ceratocystis canker.

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