I fear we may have the pest in Chicago as well. A fly like creature about the size of a bumble bee that hovered over the foliage and did not indicate any interest in visiting the flowers. This might explain a slow but steady decrease in our plantings. Boyce Tankersley Director of Living Plant Documentation Chicago Botanic Garden 1000 Lake Cook Road Glencoe, IL 60022 tel: 847-835-6841 fax: 847-835-1635 email: btankers@chicagobotanic.org