On 01/09/2012 23:20, randy oliver wrote: > Back to economic threshold, with regard to alcohol wash, if I observe > mite infestation rate to exceed 5%, I consistently see virus infection > in the broodnest. If I keep the mite infestation down to less than 2% > at highest (lower for most of the season), then the brood remains healthy. Is this your own experience? Are there other references/experiences about treatment thresholds? Thanks -- Umberto Vesco DVM, PhD Italy *********************************************** 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 Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm