There are no methods I have come across explaining these methods and i thought may be methods used for extracting pesticides from fish can still be used for mosquito larvae.
You should check the literature about extraction of bees or other insects. There are many methods available. e.g. : http://www.epa.gov/compliance/resources/policies/monitoring/fifra/bee-analytical-methods.pdf
I think it will depend on the pesticide you are extracting. If it is a neurotoxic pesticide,
such as an organophosphate (malathion, etc) or organochlorine (lindane, DDT,etc) that is not going to degrade either in the environment or Fish would be different than if you
were looking at pyrethrins/pyrethroids. Are you doing this in a field setting for insect collecting or lab colonies? Areas of pesticide resistance in the field? I would think that if, for example, a natural pyrethrin pesticide that is neither heat nor light stable or any early pyrethroid that has the same drawbacks (resmethrin, d-phenothrin) may not be
present after the extraction or at least not at the original level and probably not in fish.
Ivermectin, spinosad, cyanopyrethroids (decamethrin, deltamethrin,tetramethrin,etc.) would probably be different as well.
I don't know if this was any help, but if I knew more about the project, lab vs. field insects, pesticides you are looking to extract, etc. I may be able to have a more useful answer.
Also thanks to Mark for the website!
Terri, i normally look for mosquito larvae for water pools and place them in 4 degree centigrade fridge. I looking for a method of extracting atrazine and hydroxy atrazine from these larvaes of mosquito.
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