Telone II™, 1, 3-dichloropropene, and imidacloprid controlled the reniform nematode, Rotylenchulus reniformis and silverleaf whitefly, Bemisia argentifolia Bellows and Perring, on cotton, respectively. Both pests cause stress of cotton in the Lower Rio Grande Valley of Texas. Interaction of effects by the two stressor pests were evident on the first sample day for silverleaf whitefly but not mean adults (of 8 sample days) or adult populations sampled three and 10 days before first harvest of cotton. Results indicated that both pests reduced yield, especially in the second harvest.