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Description: |
22 pages : illustrations ; 26 cm. |
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With Note: |
Bound with: Toxicity of some insecticides to four species of Malacostracan crustaceans. (Technical Paper 66). |
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Bibliography Note: |
Includes bibliographical references (pages 20-22). |
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Summary, Etc. Note: |
Abstract: Effects of water hardness on the acute toxicity of organic and inorganic herbicides were determined in static bioassays. Bluegills were the principal test species; rainbow trout, bluespotted sunfish, goldfish, readear sunfish, and black bullheads were also tested. Organic herbicides tested included three formulations of 2,4-D, three formulations of endothall, and one forumulation of silvex, pentachlorophenol, dichlobenil; inorganic herbicides included technical grades of sodium arsenite and copper sulfate. Hardness had no significant effect on toxixity of the organic herbicides or that of sodium arsenite; the toxicity of copper sulfate decreased in harder waters. |