[Pollinator] FW: Non-cultivated plants present a season-long route of pesticide exposure for honey bees

[Vicki Wojcik]

Thanks Medhat for the forward. A great new piece highlighting the
prevalence of pesticide in the agricultural landscape out of the Krupke lab.



Victoria Wojcik, Ph.D.

Research Director

Pollinator Partnership



Toronto ON

e: vw at pollinator.org

c: 647-546-3890





Head Office

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*From:* Conference for Can. Assn. of Professional Apiculturists [mailto:
CAPA-L at LISTSERV.UOGUELPH.CA] *On Behalf Of *Medhat Nasr
*Sent:* Friday, June 03, 2016 6:29 PM
*To:* CAPA-L at LISTSERV.UOGUELPH.CA
*Subject:* Non-cultivated plants present a season-long route of pesticide
exposure for honey bees



Hi everyone, An interesting Nature article “Non-cultivated plants present a
season-long route of pesticide exposure for honey bees”.





>From the paper:



we show that pollen collected by honey bee foragers in maize- and
soybean-dominated landscapes is contaminated throughout the growing season
with multiple agricultural pesticides, including the neonicotinoids used as
seed treatments.

Notably, however, the highest levels of contamination in pollen are
pyrethroid insecticides targeting mosquitoes and other nuisance pests.
Furthermore, pollen from crop plants represents only a tiny fraction of the
total diversity of pollen resources used by honey bees in these landscapes,
with the principle sources of pollen originating from non-cultivated plants.





Pollen collected by honey bees was consistently contaminated with
pesticides throughout the 16-week period and the overwhelming majority of
pollen was collected from noncultivated plants.



Pesticide residue analyses of bee-collected pollen revealed contamination
by up to 32 different pesticides spanning 9 chemical classes. The most
common pesticide types detected in pollen samples across all sites were
fungicides and herbicides.



The carbamates, neonicotinoids and organophosphates were generally less
prevalent in pollen than the fungicides and herbicides. Although a variety
of agricultural pesticides were found at all sites, the contaminants likely
to provide the greatest hazard to honey bees in our study were
non-agricultural pyrethroid insecticides targeting nuisance pests such as
mosquitoes.



Bees from all colonies in our study collected the vast majority of their
pollen from non-crop plants even when pollen-producing field crops were
abundant in the landscape, suggesting that pollen from these crops is not a
preferred food source.





Enjoy!





Medhat



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