Moniliophthora perniciosa (previously Crinipellis perniciosa)[1] is a fungus that causes "witches' broom disease" (WBD) of the cocoa tree T. cacao.[2] This pathogen is currently limited to South America, Panama and the Caribbean, and is perhaps one of the best-known cocoa diseases, thought to have co-evolved with cocoa in its centre of origin (first recorded in the Brazilian Amazon in 1785).
This fungus is hemibiotroph, with two characteristic phases: biotrophic (expanding and infecting, on living tissue) and saprotrophic (producing basidiospores, on necrotic tissue). The biotrophic stage, and what triggers its switch to a saprotrophic stage, are still not understood.
^Aime, M.C.; Phillips-Mora, W. (2005). "The causal agents of witches' broom and frosty pod rot of cacao (chocolate, Theobroma cacao) form a new lineage of Marasmiaceae". Mycologia. 97 (5): 1012–1022. doi:10.3852/mycologia.97.5.1012. PMID 16596953.[permanent dead link]
^Becker, Hank (1999). "Fighting a fungal siege on Cocao farms". Agricultural Research. 47: 4–8.
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