A. True B. False 25. A small flock of ducks or geese is recommended to keep swimming ponds weed free. A. True B. False 26. Leeches in Ohio ponds are blood suckers and must be controlled in swimming ponds. A. True B. False 27.
Swimmers itch is controlled by eliminating snails with copper sulfate.
A. True B. False 28. Muskrats may burrow into pond banks or dams. D. All of the above 29. To control an over-population of forage fish, a partial treatment of rotenone may be applied by putting down a line of this chemical 10 to 15 feet out from the bank. A. True B. False 30.