How to Manage Pests

Pests in Gardens and Landscapes

Dematophora root rot—Dematophora or Rosellinia necatrix

Dematophora root rot, or white root rot, is not as common as other root rot fungal diseases are, but when it occurs, it can quickly kill plants. Symptoms may be exhibited throughout the entire plant or in just a portion of the canopy. Branches killed as a result of Dematophora often retain dry foliage. A white mycelial mat may be visible on the lower trunk or in soil over infected roots.

Identification

Solutions

Minimize Dematophora -caused disease by preparing the site well before planting, using quality nursery stock, and providing appropriate cultural care, especially proper irrigation.

Cobwebby fungus of Dematophora root rot
Cobwebby fungus of Dematophora root rot

Spore-bearing structures
Spore-bearing structures


Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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