I just found this European Document ... interesting ...

http://ftp.jrc.es/EURdoc/JRC83397.pdf
European Coexistence Bureau (ECoB)
Best Practice Documents for coexistence of
genetically modified crops
with conventional and organic farming
3. Coexistence of genetically modified
maize and honey production 2013

from the executive summary:

"The analysis of existing information indicates that total pollen
presence in honey ranges between 0.003 to 0.1 % in weight.
Considering the share of maize pollen in total pollen found
in honey, the extrapolated figures for maize pollen in honey
would be around an order of magnitude lower. Nevertheless,
it is important to stress that studies aiming at the detection/
identification of this trace-levels of maize pollen are usually
carried out with morphological identification and counting
of pollen grains, and that a routine DNA analysis based on
validated PCR protocol able to quantify total pollen in honey
is unavailable. Once such a method could be found, the maize
pollen fraction as well as the GM-pollen fraction of the total
pollen could be established. In conclusion, the TWG maize of
the ECoB, based on the analysis of the evidence summarised in
this document concludes that no changes in the Best practice
document on maize coexistence of July 20101
are necessary to ensure that adventitious presence of GM maize pollen in
honey is far below legal labelling thresholds and even below
0.1 %.

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