Cotton Bollworm (image) University of Arizona Share Print E-Mail Caption Despite extensive planting of transgenic cotton that produces two toxins active against the cotton bollworm (Helicoverpa zea), insecticide sprays against this voracious caterpillar pest have increased in the United States. Credit Alex Yelich, The University of Arizona Usage Restrictions This visual may only be used in conjunction with reporting or posting of this news release. Credit must be given as indicated. 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.