The comparative toxicities of organophosphorus and carbamate pesticides

K.K. Rao


Bioassay studies with organophosphorus and carbamate pesticides were conducted on the survival of the larvicidal fish, Panchax panchax var. blochi (Arnold). The median tolerance limit (TLm or LC50) was calculated for 48 and 96-hr exposure of fish to various concentrations of the pesticides. Using 96-hr TLm value, the maximum permissible levels of the pesticides were also determined. On the basis of tolerance studies, it is observed that Phosphamidon is the least toxic and Cuman is the most toxic to the fish


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