However, if infestation is severe, it is possible to kill the crawlers during mid-August when they are active using a systematic insecticide. Then use a dormant oil spray next spring. When using pesticides, read and follow label directions. 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.
If you didn't see your plant or pest problem mentioned, send your question or comment to our panel of experts at the Plant and Pest Diagnostic Laboratory at Purdue University. We'll try and post as many questions and answers here as we can.