The McPhail trap is an inverse funnel trap that is specifically designed to capture insects that prefer to enter from under- neath. Once under the trap, the insect will fly towards the pheromone lure, where it will then be trapped. Because the insect will not fly back down, it will be unable to escape the trap. This trap is designed to be used with water ,vegetable oil and detergent as the killing agent; If liquid bait is used, detergent does not need to be added to the trap. The trap should be cleaned regularly to obtain the best results.