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Pests in Gardens and Landscapes

Pest identification and confirmation—Dematophora

The white mycelial growth characteristic of Dematophora root rot may sometimes be confused with the mycelial fans produced by Armillaria root rot. Armillaria root rot forms characteristic white mycelial plaques between the bark and wood. These distinctive white fans have a mushroomlike odor and are visible when the bark is removed from infected roots and the lower trunk. The mycelial patches characteristic of Dematophora root rot are much smaller than Armillaria mycelia and lack the mushroomlike odor.

Mycelial fans of Armillaria root rotMycelial fans of Armillaria root rot

White patches of Dematophora root rotWhite patches of Dematophora root rot

 

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