After the larva completes its development, the mine turns brown and a circular area of damaged tissue drops from the leaf. Both the adult feeding holes and the larval leaf mines enlarge along with the expanding leaf tissue. Consequently, the small holes become large and may be mistaken for damage caused by a general defoliating insect. 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.