Opuntia ficus-indica system. The plant may be used as an ingredient in adobe to bind and waterproof roofs. "O. ficus-indica" (as well as other species in "Opuntia" and "Nopalea") is cultivated in nopalries to serve as a host plant for cochineal insects, which produce desirable red and purple dyes, a practice dating to the pre-Columbian era. Mucilage from prickly pear may work as a natural, non-toxic dispersant for oil spills. A commercial use for "O. ficus-indica" is for the large, sweet fruits, called tunas. Areas with significant tuna-growing cultivation include Mexico, the Mediterranean Basin, Middle East and northern Africa. The cactus grows
Opuntia (seedless) cultivars are also available. In Mexico, prickly pears are often used to make appetizers, soups, and salads through entrees, vegetable dishes, and breads to desserts, beverages, candy, jelly, or drinks. The young stem segments, usually called "nopales", are also edible in most species of "Opuntia". They are commonly used in Mexican cuisine in dishes such as "huevos con nopales" (eggs with nopal), or "tacos de nopales". "Nopales" are also an important ingredient in New Mexican cuisine. "Opuntia ficus-indica" has been introduced to Europe, and flourishes in areas with a suitable climate, such as the south of France and southern