ABSTRACT:A 0.31‐ha pond was treated with 5.0 mg/l dipotassium endothall on May 31, 1973, and the effects of this treatment on the rooted aquatics, on bluegill reproduction, survival, and growth, and on the buildup of endothall residues in bluegill flesh was investigated. The treatment eliminatedMyriophyllum exalbescens, Ceratophyllum demersum, Potamogeton crispus, andAnacharis canadenisduring the first season, however, all butC. demersumbecame reestablished the following year. Little endothall was incorporated into edible bluegill flesh. The dipotassium endothall did not affect the number of young‐of‐the‐year (YOY) bluegills produced by the original adult stocking during the year of treatment and the year following treatment and did not affect the reproduction of first generation bluegills. The survival of adult and first generation bluegills was not affected by the herbicide. Bluegills were slower growing in the treatment than the control pond, when similar densities were present in each pond. It is not known whether this was due to some unknown effect of the dipotassium endothall or to other