Silverleaf Whitefly (IMAGE) Boyce Thompson Institute Caption The whitefly is an invasive insect pest responsible for spreading plant viruses worldwide, causing billions of dollars in crop losses each year. Credit USDA Usage Restrictions Public domain 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.