Theses and Dissertations

Title: Toxicity of certain chemicals to fresh-water snails

Name: Coleman, Elvin Waren

Degree: MS

Chair: Dr. John M. Lawrence

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1955

Pages: 48

Keywords: Fresh-water snails,Snails,Physa,Copper sulfate,Chlorine,Rotenone,Zinc sulfate,Benzene hexachloride,Toxaphene.


Snails of the genus Physa serve as first intermediate host to several of the trematode parasites of fish. Control of these physid snails was attempted by treatment with six different chemicals in aquaria. The chemicals that were tested are listed below, followed by the concentration that was lethal to 100% of the test snails within 48 hours. Copper sulfate (0.2 p.p.m.), chlorine (0.5 p.p.m.), rotenone (0.25 p.p.m.), zinc sulfate (4.0 p.p.m.). Benzene hexachloride up to 1.0 p.p.m. and toxaphene up to 0.1 p.p.m. were not lethal to physid snails within 48 hours. Nine 0.008-acre ponds were treated with copper sulfate. Two ponds received each of the following concentrations: 0.4, 0.6, 0.8, and 1.0 p.p.m. In these pond tests, copper sulfate proved to be lethal to snails in areas of ponds completely covered with water. There was no apparent effect on snails that were partially out of the water or buried in the mud. This concentration also proved lethal to 100% of the snails confined in small plastic screen cylinders partially submerged in each pond. The water temperature in the ponds was 81oF.

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