Buczkowski with Roaches (IMAGE) Purdue University Caption Research by Grzegorz "Grzesiek" Buczkowski has shown a single dose of insecticide can kill three generations of pests. Buczkowski, an assistant professor of entomology, says cockroaches are difficult to control because they reproduce rapidly, are most active at night and live in inaccessible places. Credit Purdue Agricultural Communication photo/Tom Campbell 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.