> What was the effect of thymol/Apiguard?

We present data for hives treated with five
different acaricides; Apiguard (thymol), Apistan 
(tau-fluvalinate), Checkmite (coumaphos), Miteaway
(formic acid) and ApiVar (amitraz).

Natural pesticides include thymol and menthol, both monoterp-
enoids which are constituents of plant-derived essential oils.

Despite being naturally derived, these compounds may have nega-
tive effects on bees as both were found to be among the most toxic
of all terpenoids tested on bees, as well as having negative effects 
on a colony’s ability to express hygienic behavior

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