Cryptodiaporthe melanocraspeda

Cryptodiaporthe melanocraspeda
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Sordariomycetes
Subclass:	Sordariomycetidae
Order:	Diaporthales
Family:	Gnomoniaceae
Genus:	Cryptodiaporthe
Species:	C. melanocraspedia
Binomial name
	Cryptodiaporthe melanocraspedia;

Cryptodiaporthe melanocraspedia is a species of fungus that causes canker in, and has devastated stands of, the southwestern Australian wildflowers Banksia coccinea and B. baxteri. Dying stands of B. coccinea were observed in 1989, and the fungus isolated as the cause in 1995. The disease, a form of aerial canker, manifested initially as dead dry brown leaves and the tips of new growth. Plants would die from the top downwards, with larger branches affected over time. Under the outer bark, orange and brown patches of necrosis spread out from leaf nodes until they encircle the stem, which then dies. Flower spikes may be affected during flowering season. In humid spells during warm weather, white or pink spore tendrils are produced on dead wood. One affected stand monitored over three years from October 1989 to June 1992 showed a 97% mortality of plants (compared with a baseline 40%).^[1]

References

↑ Shearer, B L.; Fairman, R.G.; Bathgate, J.A. (1995). "Cryptodiaporthe melanocraspeda Canker as a Threat to Banksia coccinea on the South Coast of Western Australia" (PDF). Plant Disease. 79 (6): 637–41. doi:10.1094/PD-79-0637.

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[Shearer_1995-1] Shearer, B L.; Fairman, R.G.; Bathgate, J.A. (1995). "Cryptodiaporthe melanocraspeda Canker as a Threat to Banksia coccinea on the South Coast of Western Australia" (PDF). Plant Disease. 79 (6): 637–41. doi:10.1094/PD-79-0637.