T. D. Center, F. A. Dray, V. V. Vandiver, L. A. Gettys, and P. W. . Tipping, “Biological Control with Insects: The Waterhyacinth Weevils: SS-AGR-141/AG019, rev. 4/2017”, EDIS, vol. 2017, p. 2, May 2017.