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While the prickly pear cactus is native to the United States, Mexico, and South America, it grows well in many areas of the world, including Africa, Australia, and the Mediterranean. In some areas of South Africa and Australia, it has become a notorious weed.
The cactus moth was first introduced to Australia in the 1920s as a biological control for prickly pear cactus. Later, the cactus moth was introduced to the Caribbean Islands and was first reported in the U.S. in the Florida Keys in 1989 where it may have hitchhiked in on ornamental cacti from the Caribbean (MSU 2009).hrough the loss of Opuntia cacti, the cactus moth threatens native habitats and agriculture. Prickly pear is a source of food for birds and wildlife and represents a major plant genus of desert ecosystems in the southwestern U.S. and Mexico.