Signs of PSHB include entrance holes with brown stains, small heaps of sawdust, sap flow or “bleeding”, wilted brown leaves and branch dieback.
The PSHB penetrates host trees through the bark, into the sapwood. Entrance holes can be seen with brown stains around the perimeter due to the associated fungus. Other signs of entry include small heaps of sawdust, “bleeding”, noodles, stains or sap-flow.
Infected trees may show wilted and brown leaves, with branch dieback indicating damage to vascular systems. Branch dieback can weaken the structural integrity of affected trees and dead branches may fall unpredictably.
Frequently asked questions
What are the signs of a PSHB infestation?
Entrance holes with brown stains around the edge, small heaps of sawdust, “bleeding”, noodles, stains or sap flow, wilted and brown leaves, and branch dieback.
What should I do if I suspect a tree is affected?
Seek advice from a qualified arborist or relevant authority. This page is information only and is not a diagnosis.
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