Trap cropping is the planting of a trap crop to protect the main crop from a pest, by having the trap crop appear more attractive to the pest than the main crop. There are two forms of trap cropping; perimeter trap cropping (PTC), also known as border trap cropping, and row intercropping. Perimeter trap crops completely surround the main crop, preventing an attack from any direction. Row intercrops are planted in alternating rows with the main crop. While PTC and row intercropping can be useful methods in pest control, they may not alleviate a problem completely, but provide a sustainable way to monitor and control target pests.