About the Disease
Fusarium dieback symptoms: White powdery exudate either dry or surrounded by wet discoloration of the outer bark in association with a single beetle exit hole. While there is no visible injury to the bark at this stage of colonization, examination of the cortex and wood under the infested spot bored by the beetle reveals brown discolored necrosis caused by the fungus.
Known fungi species for PSHB/FD are Fusarium euwallaceae, Graphium euwallaceae and Acremonium pembeum. KSHB/FD carries new fungi species of Fusarium and Graphium.