Traps are used to determine populations of fruit flies in an orchard. Regular monitoring and recording should be maintained, including any zero readings. There are lots of traps available which catch fruit fly to varying levels, with yellow traps proving more attractive to the fruit flies than green, red or blue traps.
Traps may be placed at two traps per hectare usually on the eastern part of the tree to avoid intense afternoon sunlight. Traps contain a wick impregnated with a male sex attractant and insecticide.