Theobroma cacao coming from Chuao were awarded an appellation of origin under the title "Cacao de Chuao" (from Spanish-"cacao of Chuao"). The cacao bean in 80% of chocolate is made using beans of the Forastero group, the main and most ubiquitous variety being the Amenolado variety, while the arriba variety (such as the Nacional variety) are less commonly found in Forastero produce. Forastero trees are significantly hardier and more disease-resistant than Criollo trees, resulting in cheaper cacao beans. Major cocoa bean processors include Hershey's, Nestlé and Mars, all of which purchase cocoa beans via various sources. Chocolate can be made from "T.
Moniliophthora perniciosa cacao beans annually. "T. cacao" L. is an understorey tropical plant, and the understorey growth of cacao helps to preserve habitat for numerous animal and bird species in these regions. With the production losses associated with WBD, tropical landowners are forced to convert their land to other production systems that usually require the destruction of the forest cover. WBD does not only affect the supply of cacao, but also largely impacts the conservation of tropical environment where cacao is grown. Moniliophthora perniciosa Moniliophthora perniciosa (previously "Crinipellis perniciosa") is a fungus that causes "witches' broom disease" (WBD) of the cocoa tree