Moniliophthora perniciosa
Moniliophthora perniciosa (previously Crinipellis perniciosa) is a fungus that causes "witches' broom disease" (WBD) of the cocoa tree T. cacao. 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).
Source: Wikipedia — Moniliophthora perniciosa (CC BY-SA 4.0)