DiseaseHigh Severity

Leptographium Canker (White Pine Root Decline)

Leptographium procerum (formerly Verticicladiella procera)

A serious root and canker disease affecting various pine species, originally described as White Pine Root Decline. The disease manifests as both root decline and wilt symptoms, and can reach epidemic proportions in Christmas tree plantations and susceptible pine stands.

Peak Season: Disease development: Throughout growing seasonSymptom expression: Progressive wilt and declineRoot infection: During periods of root activityPeak mortality: Often during stress periodsYear-round presence: Persistent in infected root systems
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Leptographium canker showing characteristic root decline and canker symptoms in pine trees

Identification & Symptoms

What to Look For

Wilting symptoms resembling root collar weevil damage
Yellowing or dead leaves
Growing point wilt
Root rot and wood discoloration
Stem discoloration and gummosis or resinosis
Internal feeding damage and stem mould growth
Whole plant dieback and mortality

Potential Damage

Root system decay and dysfunction
Vascular system disruption causing wilt symptoms
Tree mortality in severe cases
Economic losses in Christmas tree plantations
Potential for epidemic spread in susceptible stands
Weakening making trees susceptible to secondary pests

Lifecycle

Complex fungal pathogen with morphologically similar species in the Leptographium complex. The fungus colonizes root systems and can spread through root contacts or soil transmission. Disease development is often associated with stress factors and can be confused with weevil damage.

Professional Treatment Approach

1

Fungisol applications for root and canker disease management

2

Address predisposing stress factors

3

Improve drainage and soil conditions

4

Remove and destroy infected trees to reduce inoculum

5

Avoid root damage during cultural operations

Recommended Mauget Products

Fungisol

Professional-grade treatment specifically effective against leptographium canker (white pine root decline).

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