Bee Culture;4/1/2012, p6
The article focuses on the survey for the lost of bee colonies in New Jersey in winter 2010-2011 and the influence of Varroa destructor on their survival. The survey collects data on the number of colonies managed alive by New Jersey Beekeepers Association members on December 1, 2010 that survive until March 15, 2011. The survey reveals that 1,290 of the 1,939 colonies were reported alive on April 1, 2011. Moreover, 65% colony mortality was reported during non treatment of v. destructor.
The most usual hive losses by mite are reduced colony size, delayed build up and so losses in honey yield.
But 2/3 dead hives, that is bad. The rest are not in good condition either.