The max. increase of 35% in yield (the average increase obtained with 0.66% DDT spray) shows a significant amt. of injury caused by the tobacco thrips, Frankliniella fusca, which is of sufficient economic importance to justify considerable expense in the control of this insect. The tests were made at Beltsville, Md., during 1944 and were designed to measure the damage caused by this insect. Further studies in the commercial peanut-producing areas will be necessary to determine practicable control measures.