TOXIC INTERACTION OF CHLORPYRIPHOS AND COPPER SULPHATE ON CHICKEN EMBRYO.

: The single and simultaneous phytotoxic effect of copper sulphate and Pyrinex 48 EC insecticide were investigated on chicken embryos. The eggs were injected by 0.1 ml of copper sulphate solution (0.05%) and/or by 0.1 ml of Pyrinex 48 EC (chlorpyriphos, 480 g/l; 1%). The treatments were performed on day 0 of incubation, and the embryos were examined on day 3 and 19 of it. Germinal disc was prepared to study the early stage of development. Number of embryonic death, developmental abnormalities and body weight of embryos were recorded on day 19. Liver samples were taken for histology and the skeleton was stained by Dawson method. The embryo mortality was not influenced by single treatment of copper sulphate, however, Pyrinex 48 EC and the combination of the test items significantly increased it on day 3. Same tendency was observed in the case of developmental aberration. Single administration of both test items and their combination significantly increased the embryo mortality on day 19. Frequency of abnormalities was not influenced by copper sulphate but single and simultaneous application of insecticide increased it significantly. Pyrinex 48 EC alone and in combination with copper sulphate significantly reduced the body weight, however, the copper sulphate alone did not influence it. Developmental abnormalities were observed sporadically in all cases. There were no findings of drug-induced hepatopathy, however, the ratio of the mitotic cells were markedly reduced. Based on the results, addition and synergistic toxic interaction may be between the copper sulphate and Pyrinex 48 EC that can highly reduce the viability of the embryos.