Hang the red ball traps in the proximity of fruit, at eye level, on the south or southeast side of the tree. For large, mature trees, use up to 6 traps per tree. If using more than one trap per tree, place some traps facing a wooded or brushy area.
Hang each red ball trap on a sturdy stem about 12" above a dense patch of fruitlets, and remove any foliage to create a leaf-free area that is at least 18" in diameter.
The apple maggot lure increases the efficacy of the red ball traps by attracting flies from a distance; use a maximum of one lure per tree. Remove the lure from its clear plastic wrapper, but do not remove the white foil; the apple essence scent penetrates the white foil. Hang the lure on a limb so that the lure is closer to the trunk than the red ball traps are.