How dо pesticides get into honey?

Honey is nature’s sweetest gift. But did you know that honey
may contain pesticides? Farmers use pesticides to kill pests
that harm their crops. But pesticides also hurt honey bees
and other beneficial insects. Furthermore, when bees collect
nectar from flowers which received pesticide treatments,
these chemicals make their way into the honey. In the
past, scientists found neonicotinoids (a class of pesticides)
in about half of the honey samples collected in the United
Kingdom.
Since 2014, the European Union banned neonicotinoids
in flowering crops that bees visit. We wanted to know
how effective this policy was. Does UK honey still contain
neonicotinoids? Here, we collected and tested honey samples
from beekeepers across the UK. We found that about a fifth
of all honey contained neonicotinoids. These chemicals are
not at dangerous levels for human health but may harm the
bees in the long run.