A trap crop is a plant that attracts agricultural pests, usually insects, away from nearby crops. This form of companion planting can save the main crop from decimation by pests without the use of pesticides.[1] While many trap crops have successfully diverted pests off of focal crops in small scale greenhouse, garden and field experiments,[2] only a small portion of these plants have been shown to reduce pest damage at larger commercial scales.[2][3] A common explanation for reported trap cropping failures, is that attractive trap plants only protect nearby plants if the insects do not move back into the main crop. In a review of 100 trap cropping examples in 2006, only 10 trap crops were classified as successful at a commercial scale,[3] and in all successful cases, trap cropping was supplemented with management practices that specifically limited insect dispersal from the trap crop back into the main crop.[3]