The larvae feed on "Quercus chrysolepis". Canyon Live Oak (Quercus chrysolepis) is a severe allergen. Island oak hybridizes with canyon live oak ("Quercus chrysolepis"). Other trees include Canyon live oak ("Quercus chrysolepis"). The canyon live oak ("Quercus chrysolepis") and silverleaf oak ("Quercus hypoleucoides") are also affected. "Quercus chrysolepis" is found in a variety of forest communities in the southwestern United States.