 The traps are yellow paneled, adhesive traps baited with ammonium carbonate lures.The area surrounding locations which successfully trap apple maggots may be further studied by analyzing fruit in the area for the presence of apple maggot larvae and, ultimately, placed in the quarantine zone.In 2011, for instance, the trapping of 35 apple maggots at 23 locations in Chelan County resulted in a recommendation to extend the quarantine zone to the western part of that county.