Please use this identifier to cite or link to this item:
|Title||Eco-toxicity of Carbaryl, Chlorpyrifos, and Diuron, as Single and in Mixtures on Daphnia magna and Tilapia nilotica|
Application of pesticides creates a lot of environmental problems, and toxicity to the ecosystems. The aims of this study are to determine, and compare the potential toxicity of three pesticides frequently used by farmers at Gaza- Palestine (Carbaryl, Chlorpyrifos, and Diuron) on the aquatic ecosystem singly, with theirs binary mixtures, and with their ternary mixtures. All experiments were conducted on laboratory using the fresh water Cladoceran (Daphnia magna), and the Red fish (Tilapia nilotica) as biomarkers in accordance with the static OECD standardized Acute Tests. Results on fish showed that Chlorpyrifos was the most toxic (LC50 = 0.08 µmol/l) followed by Carbaryl (LC50 = 43.19 µmol/l), while Diuron was the least toxic one (LC50 = 43.48 µmol/l). The LT50 values (the time required to kill 50% of the exposed population of the tested organism) of the tested pesticides ranged between 60.86-68.04 hr. for the tested pesticides. The toxicity to Daphnia magna showed the following sequence: Chlorpyrifos (EC50 = 0.001 µmol/l), Carbaryl (EC50 = 0.031 µmol/l) and Diuron (EC50 = 32.11 µmol/l). Binary, and the ternary mixtures of these pesticides showed antagonistic effects. Statistical analysis showed significant difference among mixture toxicities to fish and D. magna. Relative toxicity evaluation indicate more sensitivity of D. magna to the tested pesticides than fish.
|Publisher||الجامعة الإسلامية - غزة|
|Files in this item|