Pink Bollworm (IMAGE) National Science Foundation Caption A caterpillar of pink bollworm, a global pest that evolved resistance to a type of genetically modified (GMO) cotton in India, emerges after devouring a boll of cotton. In Arizona, farmers have planted refuges of conventional cotton, along with GMO cotton. This has reduced selection for evolutionary resistance in the pink bollworm. Credit Alex Yelich, Department of Entomology, University of Arizona 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.