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Comparative effects of diquat plus copper sulphate on aquatic organisms



Comparative effects of diquat plus copper sulphate on aquatic organisms



Weed Science 21(3): 249-253



The synergistic effect of 2 herbicide combinations on the macroinvertebrates in Inglis Reservoir, West Florida and the possible influence on fish diets were evaluated during 1970. The addition of diquat + the triethanolamine complex of copper sulphate (TAC) or diquat + copper sulphate pentahydrate (CSP) for control of hydrilla (Hydrilla verticillata) decreased the number of invertebrates inhabiting the treated areas. Diquat + CSP exerted the greatest effect upon invertebrate numbers but both herbicide combinations significantly altered the number of taxonomic groups in the areas. Invertebrate declines were due to resultant habitat changes such as loss of hydrilla rather than to direct herbicide toxicity. The response of fish to the effects of the herbicide treatments on invertebrates could be ascribed to diet changes, decreased growth rates and possible mortality. From summary.

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Accession: 000044722

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