> > > But, summing things that kill by other biochemical routes than > cholinesterase inhibition with cholinesterase inhibitors is not at all > reasonable. Understood Dick. In the case of this study, the top 6 insecticide residues for toxicity were all involved in neural stimulation, either as NAChE inhibitors, nAChRs, or sodium channel modulators. The authors needed to make some sort of assumption as to how to estimate the cumulative effect of the exposures, and it seems to me that their assumption was not unreasonable. -- Randy Oliver Grass Valley, CA www.ScientificBeekeeping.com *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html