The effectiveness of Mycotrol WP and Provado 1.6F were tested alone and in combination to control adult tarnished plant bug. Mycotrol WP contains the natural insect pathogen Beauveria bassiana which can infect a wide host range. Provado 1.6F contains imidacloprid which possesses activity against sucking insects. When Mycotrol and Provado were applied together at half of the maximum recommended rate for both insecticides, control was equal to that of Provado alone at maximum rate and greater than Mycotrol alone at maximum rate. Provado significantly increased tarnished plant bug mortality for at least 48 hours after spray. Mycotrol significantly increased mortality for 24 hours after spraying. Results from feeding trials suggested that plant bugs exposed to Provado showed an immediate decrease in feeding while those treated with Mycotrol only decreased feeding seven days after exposure.