Rice Field (image) University of California - Riverside Share Print E-Mail Caption A rice field in northern Cameroon. In addition to long-lasting insecticidal nets, urbanization, chemical pollutants, and agriculture play a key role in selecting insecticide-resistant mosquitoes. Credit Caroline Fouet, UC Riverside. Usage Restrictions None Share Print E-Mail 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.