As stubborn facts ruin their narrative that neonicotinoid pesticides are causing a honeybee-pocalypse, environmental pressure groups are shifting to new scares to justify their demands for “neonic” bans.
Honeybee populations and colony numbers in the United States, Canada, Europe, Australia and elsewhere are growing. It is also becoming increasingly clear that the actual cause of bee die-offs and “colony collapse disorders” is not neonics, but a toxic mix of predatory mites, stomach fungi, other microscopic pests, and assorted chemicals employed by beekeepers trying to control the beehive infestations.
Naturally, anti-pesticide activists have seized on a recent study purporting to show that wild bee deaths in Britain have been correlated with neonic use in oil seed rape fields (canola is a type of OSR). In a saga that has become all too common in the environmental arena, their claims were amplified by news media outlets that share many activist beliefs and biases – and want to sell more subscriptions and advertising.
(Honeybees represent a small number of species that humans have domesticated and keep in hives, to produce honey and pollinate crops. Many are repeatedly trucked long distances, to pollinate almond and other crops as they flower. By contrast, thousands of species of native or wild bees also flourish across the continents, pollinating plants with no human assistance.)
The recent Center for Ecology and Hydrology study examined wild bee population trends over an 18-year period that ended in 2011. It concluded that there was a strong correlation between population and distribution numbers for multiple species of British wild bees and what study authors called their “measure of neonic dose” resulting from the pesticide, which is used as a seed coating for canola crops.
The study is deeply flawed, at every stage – making its analysis and conclusions meaningless. For example, bee data were collected by amateur volunteers, few of whom were likely able to distinguish among some 250 species of UK wild bees. But if even one bee of any species was identified in a 1-by-1 kilometer area during at least two of the study period’s 18 years, the area was included in the CEH study.
This patchy, inconsistent approach means the database that formed the very foundation for the entire study was neither systematic nor reliable, nor scientific. Some species may have dwindled or disappeared in certain areas due to natural causes, or volunteers may simply have missed them. We can never know.
There is no evidence that the CEH authors ever actually measured neonic levels on bees or in pollen collected from OSR fields that the British wild bees could theoretically have visited. Equally relevant, by the time neonics on seeds are absorbed into growing plant tissue, and finally expressed on flecks of pollen, the levels are extremely low: 1.3-3.0 parts per billion, the equivalent of 1-3 seconds in 33 years.