Laminated Root Rot in the Southern Interior. My Talk Biology Disease Recognition Detection Treatment & Management.

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Presentation transcript:

Laminated Root Rot in the Southern Interior

My Talk Biology Disease Recognition Detection Treatment & Management

Phellinus weirii (Douglas-fir type) or Inonotus sulphurascens

How it Gets its Common Name

What is it? Fungus that grows on the roots of conifers Spreads by root to root contact Survives for long periods in stumps Losses in BC estimated at over 1million m3/yr. (40,000 houses)

Hosts Highly SusceptibleSusceptibleTolerantResistantImmune Douglas-fir true fir western hemlock spruce larch pinescedarshardwoods

Age Effects Young trees die  1-2 years Older trees  years Old Growth  more like a butt rot

Distribution Follows natural distribution of Douglas-fir IDF/ICH (higher hazard in wetter subzones) Exceptions Chilcotin Plateau Quenel District is northern limit

Life Strategy Get there first (first come first serve) Protect your turf  gated (zone lined) community Wait for the next unsuspecting victim (stealth pathogen)

My Talk Biology Disease Recognition Detection Treatment & Management

Symptoms (I’m sick!)

Signs – Ectotrophic Mycelium (first come first serve)

Setal Hyphae

Brown Crusty Layer (pseudosclerotial plates)

Stain

Decay (& Zone Lined or Gated Community)

Survival (Stealth Mode)

Fruiting Body

Outline Biology Disease Recognition Detection Treatment & Management

Root Rot Centers

Look Up Way Up

Survey Methods Helicopter or Ortho Photos Fairly easy to detect with a helicopter with good imagery it is often possible to roughly map larger centers from photos Walkthroughs Detailed Pre-harvest or stump-top Transect surveys Sketch mapping

Large DRL Center detected from the air and mapped in Google Earth

Laminated Root Rot (Likely)

Douglas-fir and Birch Leading

Stratification - Blast from Past

Confounding Factors Often plays 2 nd cousin Associated with & Masked by Douglas-fir Beetle, Armillaria Root Rot, Deciduous patches left out of blocks (crappy cedar)

My Talk Biology Disease Recognition Detection Treatment & Management

Treatment Stumping Alternate Species

Limiting Factors Fine textured soils Wet sites Steep slopes Large stumps Shallow soils Riparian areas

Alternate Species Highly SusceptibleSusceptibleTolerantResistantImmune Douglas-fir true fir western hemlock spruce larch pinescedarshardwoods

Any Questions?