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By Cathy Cromell
Holly Shimizu, Executive Director of the U.S. Botanic Garden (USBG) in Washington, D.C., lives a plant lover's dream. She has worked in world-famous gardens, including a...more
Iris borers cause foliage to be ragged and yellow-streaked and rhizomes soft and mushy. The tunneling in the rhizome allows rot diseases to invade. To control, dig up, remove, and destroy severely infected rhizomes.
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