M.O, Kyaw (2001) The Half-lives of biological activity of some pesticides in water. NAGA The ICLARM Quarterly, Vol.24 (3-4). pp. 11-13.
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In the absence of analytical methods, the half-lives of biological activity of pesticides can be estimated by bioassays. To determine the half-lives of biological acivity of pesticides to fish, static bioassays were conducted in the laboratory with ten different formulations of pesticides using Labeo rohita as a bio-indicator. The half-lives of biological activity for ten different pesticides in soft water at pH 7.5 and 27°C, ranged from 4.6 days to 11.8 days. The half-life of biological activity of Sumithion 50% EC was only 4.6 days. In contrast, Dimecron 50% EC degraded very slowly and its half-life of biological activity on L. rohita was about 11.8 days. Sumithion 50% EC, Padan 50% SP, EPN 45% EC, Diazinon 40% EC and Diazinon 10 G degraded in less than five to seven days indicating that these pesticides are desirable for rice-fish culture. Contamination by pesticides with long-term residual toxicity in waters may eventually cause high levels of fish mortality.
| Item Type: | Articles |
|---|---|
| Keywords: | Pesticides, Water Quality, Water Pollution, Research and Development, Rice Fish Culture, Value, Information, Fish Mortality, Fishing Methods, Reduction, Fish, Species, Aquarium, Environmental Pollution |
| Subjects: | Right to Resources |
| Depositing User: | Chitti Babu ICSF |
| Date Deposited: | 25 May 2022 07:05 |
| Last Modified: | 25 May 2022 07:05 |
| URI: | http://icsfarchives.net/id/eprint/13168 |
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