IRosenkranz was on the same working group as Nanetti and his review is excellent but only quotes 2.2 -2.6 viable adults exiting drone cells.
I do not understand your motivation, what is the idea to pick one result from somewhere.
These thing has revieled 15 - 20 years ago, and now The British 1-Hive Group . suddenly, started to challenge old researchs, which actually have given many kind of results.
But I really do not understand, why? What are you aimeing? That I am fool or what is the idea, or Nanetti is fool, and somebode else a nice guy is not.
And you greengumbo, you are valid to say who is a good varroa detective?
First, life span of female mite is sometimes long. The mother mite may enter cells for reproduction on repeated occasions but although the biological maximum is as high as 7–8 times,
A drone pupa produces normally 8 adult mites, but the oroninal parent miteas are too alive. Pupa gemneration makes 10 adult mites ... adording one paper.
Worker pupa makes half of that + original parents = adult 5 mites
There are bee strains, where mites can give only few fertile adults. There are big variation.
"The number of offspring that reach maturity is positively correlated with the length of the host’s capped stage, which is greatest for drones, intermediate for workers, and shortest for queens.
Mites that reproduce on drone brood average 2.2 to 2.6
female offspring per host, while those reproducing on worker brood average 1.3 to 1.4
female offspring per host. Mites cannot reproduce on queen brood due to its short capped period. Not surprisingly, mites are found more often on drone brood than worker brood, with average differences between 5- and 12-fold. Mites are only rarely found on queen brood. "
Yes, it was not adult, it was female
http://www.sare.org/Learning-Center...Acid/Text-Version/Life-Cycle-of-V.-destructor
