Thanks for your question. It looks like it may be leaf miners which are difficult to control because the live within the leaf. You could simply remove and dispose of the affected leaves which will serve to reduce their population. But more importantly, this is an invasive plant that is not recommended for planting as it spreads into natural areas and out-competes our native plants. Here is a page from the invasive assessment on the plant: http://plants.ifas.ufl.edu/wp-content/uploads/files/caip/reco_cards/lancam.pdf. Your very best bet would be to remove it and plant something else that is either native or "Florida-Friendly". Here is a link to the Florida-Friendly searchable database: http://floridayards.org/fyplants/. Thank you!