Four weeds (Acorus calamus, Artemisia tridentata, Heliopsis longipes, and Tagetes minuta) and three cultivated plants (Azadirachta indica, Mammea americana, and Ocimum basilicum) are potential candidates for crop development and commercialization for sources of insect attractants, repellants, or toxicants. Although all could be commercially viable, the neem tree (A. indica) is by far the most l...