Designer Insecticides Target Mosquito Dopamine Receptors (IMAGE) Purdue University Caption Purdue researchers Catherine Hill and Val Watts are designing insecticides that disrupt key molecules in disease-transmitting mosquitoes. Credit Purdue University / Tom Campbell Usage Restrictions Please provide photo credit. 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.