Fall sanitiation is very important for iris borer control. Following the first hard frost, remove and destroy old iris leaves, stems, rotted rhizomes and nearby plant debris. This will help to get rid of the overwintering egg stage. The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by the Purdue University Cooperative Extension Service is implied. Any person using products listed assumes full responsibility for their use in accordance with current direction of the manufacturer.
Information listed is valid only for the state of Indiana.