Toxic Effect of Synthetic Pyrethroid Deltamethrin and Neem Based Formulation Achook on Zebrafish, Danio rerio

In the present study, the toxic effect of synthetic pyrethroid, Deltamethrin and a neem based formulation, Achook on zebrafish, Danio rerio was evaluated. Adult male and female zebrafish were randomly selected and exposed to these two pesticides. A 24h to 96h LC50 values were calculated. It was found that toxicity was time as well as concentration dependent. The result shows that zebrafish is very sensitive to Deltamethrin than that of Achook. It was also observed that Achook which is a natural product and reported to be safe for non-target animals, is also toxic to zebrafish at low concentrations. zebrafish can be used as bioindicator to assess the pesticidal pollution in aquatic environment.