Effects of the pesticides thiotox, dichlorvos and carbofuran on the test fish Mystus vittatus
1980
Verma, S.R. | Rani, S. | Bansal, S.K. | Dalela, R.C. (DAV College, Muzaffarnagar (India). Dept. of Zoology, Pollution Relevant Research Lab.)
A quantitative index of synergism, anatagonism and additivity has been measured experimentally in the fish Mystus vittatus for three pesticides viz. Thiotox (Endosulfan) (T), Dichlorvos (D) and Carbofuran (C). For a combination of two pesticides, the dose of the one pesticide of a pair was fixed at the no-effect level while the dose of the second pesticide was increased until the entire dose response curve was obtained. To evaluate interactions of three pesticides, the previous pair of pesticides was kept fixed at their combined TL(,0) level, and the third pesticide was increased and again a dose-response curve was obtained. From the results obtained, it is shown that a particular combination could be synergistic, antagonistic or additive, depending on the relative doses employed. In the present study (T + D)/C combination was most synergistic (toxic) in nature while D/T and C/T were least toxic antagonistic in their effects. However, T/D, (C + T)/D, C/D and D/C combinations were additive in nature. (D + T)/C, (D + C)/T, (T + C)/D and (C + D)/T combinations were found less synergistic in nature than (T + D)/C.
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