Pheromone Trap, Pheromone Funnel trap, as the name suggests, is a funnel-covered at the Top by a canopy that holds the pheromone dispenser, with radial openings all around for entry of the Moths. Moths attracted by the pheromone enter the funnel, hit the sides while in flight and drop down into the transparent polythene bag attached to the lower end of the funnel and get killed. The polythene bag can be cleaned and replaced occasionally, depending on the insect catch rate.
How they work: The males, attracted by the female pheromone lure, enter the trap and get hit by the sides of the walls at the base of canopy and fall into the polythene bag and get killed. These traps are installed in the fields at the rate of 5-7 traps per hectare for monitoring and 15-20 traps per hectare for mass trapping. Traps should normally be attached to stakes at crop height and placed within the crop with at least 50m between each trap.
To avoid affecting the efficiency of the trapping system it is strongly recommended that traps be used only for the one species. Never use the dispensers for other insect species in these traps