This fact sheet provides information on thrips that feed on lettuce. Feeding by thrips can cause curled leaves and silvering and wilting. Some species of thrips transmit Tomato spotted wilt virus (TSWV) which causes wilting of leaves and a distinct russeting of leaves. The fact sheet helps with identification of thrips and provides tips for monitoring and managing them in hydroponic lettuce crops. Note that the chemical information on the second page is OUT OF DATE. Refer to other resources for current information on chemical control recommendations including rotation of chemicals. Information relevant to the management of Western flower thrips (WFT), Tomato spotted wilt virus (TSWV) and other Thrips and Tospoviruses is included in this item.