Biscogniauxia (Hypoxylon) Canker or Dieback in Trees
Typical young 'Fiesta' plants approximately 30 days after tubers were planted in the ground bed. Figure 3 from publication ENH1281/EP545: Caladium Cultivars ‘Cosmic Delight’, ‘Fiesta’ and ‘Hearts Desire’. Credit: Zhanao Deng, UF/IFAS.
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construction damage
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Hypoxylon canker
oak disease
urban tree disease
Tree and Shrub Diseases

How to Cite

Paez, Claudia, and Jason A. Smith. 2017. “Biscogniauxia (Hypoxylon) Canker or Dieback in Trees: FOR338/FR407, 11/2017”. EDIS 2017 (6). Gainesville, FL.


Biscogniauxia canker or dieback (formerly called Hypoxylon canker or dieback) is a common contributor to poor health and decay in a wide range of tree species (Balbalian & Henn 2014). This disease is caused by several species of fungi in the genus Biscogniauxia (formerly Hypoxylon). B. atropunctata or B. mediterranea are usually the species found on Quercus spp. and other hosts in Florida, affecting trees growing in many different habitats, such as forests, parks, green spaces and urban areas (McBride & Appel, 2009).

 Typically, species of Biscogniauxia are opportunistic pathogens that do not affect healthy and vigorous trees; some species are more virulent than others. However, once they infect trees under stress (water stress, root disease, soil compaction, construction damage etc.) they can quickly colonize the host. Once a tree is infected and fruiting structures of the fungus are evident, the tree is not likely to survive especially if the infection is in the tree's trunk (Anderson et al., 1995).
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