"Larvae form whitish blotch mines, with several larvae in the same leaf. The mines frequently merge and give the appearance of a single very large mine" (Spencer and Steyskal, 1986, via BugGuide).
Larvae create blotch mines on leaves of Ageratina, Arctium, and Eupatorium (Spencer and Steyskal, 1986, via BugGuide), as well as Eutrochium (C. Eiseman/BugGuide). We have records for Maryland on Common Boneset, Hollow Joe Pye Weed, and others.
There are 41 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |