The 300 hundred bee sample for beekeeper use is well covered here with plenty of discussion of error rates expected. Note recommendation of larger samples for research purposes: https://www.researchgate.net/publication/46392120_Practical_Sampling_Plans_for_Varroa_destructor_Acari_Varroidae_in_Apis_mellifera_Hymenoptera_Apidae_Colonies_and_Apiaries/link/09e4150cba82b930cd000000/download *********************************************** 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