Megachile on redbud (IMAGE) University of California - Riverside Caption An alfalfa leafcutter bee, the type used by UC Riverside scientists to study the effects of pesticide and water levels. Credit David Rankin/UCR Usage Restrictions None License Original 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.