Cactus (Opuntia Ficus-Indica) Infestation (IMAGE) University of the Witwatersrand Caption A cactus (Opuntia ficus-indica) infestation in South Africa makes farmland unsuitable for use. Credit Wits University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.