TRANS LOCATION AND TOXIC EFFECTS OF DICHLOROVOS IN RICE-FEAI ECOSYSTEMSYED ASHIZAF SIDDIQUI, MD. KAWSER AHMED AND MIAH MUHAMMED ABDUL QUIDDUSAbstract The present study investigated the toxic effects of pesticide Nogos on freshwater fish, Clarias bat radius, and its translocation and residual accumulation in a pesticide administrated rice-fish ecosystem under laboratory condition. Experiment was conducted in aquaria containing soil collected from the paddy fileds. Nogos was applied in the soil. Maximum radioactivity was observed in water on day 2(1.1 mg/g) of application of the pesticide. Soil sample showed peak radioactivity 0.55 mg/g on day 12 of application and thereafter declined slowly to background level by day 90 of pesticide application. Paddy root and shoot showed highest activity on day 24 (0.24 mg/g) and day 24 (0.20 mg/g), respectively. Highest level of radioactivity was recorded in intestine (1.2 mg/g) and 0.95 mg/g and 0.85 mg/g on gills and liver respectively.
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