Figure 6
Evaluating the impact of insecticides and their enzymatically-generated degradation products on planarian head regeneration. Five planarians were cut above the pharynx and incubated in insecticide solutions (a). Head regeneration of planarians over 15 days (D0 to D14) is presented using a color code from light to dark blue describing initial to final regeneration stages as presented in figure caption (b). Paraoxon-ethyl (c), parathion-ethyl (d), diazinon (e), fenitrothion (f) and the related degradation products were evaluated. Dead planarians are colored black. (+) and (−) Describe the solution with and without enzymatic degradation. As pesticides were initially solubilized in ethanol before dilution in water to reach final concentration, the control solutions represent the maximum final ethanol concentration for each insecticide.
