An insect trap has a “U” or similar shaped cross-section view, forming a circle or square, with a dark-colored coarse outer surface and a light-colored smooth inner surface. The trap can be placed around an arthropod-infested object such as furniture leg, luggage, food to form a barrier to prevent movement of arthropods between the infested object and its surrounding areas.The trap can also be placed where arthropods live or forage to monitor their numbers and activities such as at corners of a room, along perimeters of a room, inside a cabinet, inside food storage container, etc.
