The increasing search for safer alternatives for pests control, which are less aggressive for the environment, has brought a significant development of new molecule insecticide, with possibilities of use in agricultural pest management and contributing to a safer and more efficient way of pest control. The objective of this work was to evaluate the performance of the new insecticide (rynaxypyr) from the anthranilic diamide class of chemistry with activity on a broad spectrum of economically important pest species. The mode of action is activation of insect ryanodine receptors. The experiment was installed in field conditions, in Ilha Solteira/SP/Brazil, in cotton. The treatments consisted: rynaxypyr at foliar spray (at 30, 40 and 50 g a.i./ha, indoxacarb (at 75 g a.i./ha) and betacyfluthrin (at 10 g a.i./ha). The evaluations were accomplished until 15 days after the spray, by counting the number of caterpillars in 50 bolls per plot. The analysis of the results showed that the all rynaxypyr doses were efficient on the control of the tobacco budworm in cotton.