Effects of Selected Herbicides on Bluegill Sunfish

The toxicity to bluegill sunfish (Lepomis macrochirus Rafinesque) of 15 new or reformulated herbicides is presented. Six phenoxy compounds assayed were within toxicity limits previously reported. The endothal derivatives tested were also within previous limits but did show promise as an aquatic herbicide. Substituted urea compounds checked did not demonstrate any differences from those previously reported. A pelletized formulation of sodium arsenite was very toxic but should be more convenient to apply.