[Pollinator] Fwd: Significance of Plants as a Water Source for Bees

[Galen Dively]

Mary,

You probably have the follow up studies that were conducted in 
Switzerland and by Bayer to assess the risk of exposure to guttation 
droplets. If not, I can email copies of reports. Basically, they showed 
no effects at the colony level with hives placed next to seedling corn 
planted with Poncho treated seed. Toxicity is certainly a possibility as 
showed by the study in Italy but the real issue is exposure and the 
evidence thus far indicates the bees are unlikely to be foraging in 
seedling corn at a time of the growing season when they would be 
concentrating on pollen and nectar sources available elsewhere during 
the spring nectar flow. To my knowledge I don't think there has been 
much more research on this issue in the open literature but studies may 
be underway.

Galen Dively

On 2/23/2011 10:05 PM, Ladadams at aol.com wrote:
>
>     ------------------------------------------------------------------------
>     From: Clock-Rust.Mary at epamail.epa.gov
>     To: lda at pollinator.org
>     Sent: 2/23/2011 11:22:27 A.M. Pacific Standard Time
>     Subj: Significance of Plants as a Water Source for Bees
>
>
>     Dear Pollinator List Serv,
>
>     I am writing to ask if anyone has heard of scientific literature
>     or even
>     research in progress on the topic of guttation water drops as a source
>     of water for Apis and non-Apis bees.   I am looking to see just how
>     significant guttation water is for bees.  It does not appear there is
>     much information on this, yet it could be a potential source of
>     pesticide exposure to bees.
>
>     Your thoughts on this topic are most welcome!
>
>     Thank you,
>
>     Mary Clock-Rust
>
>     Environmental Fate and Effects Division
>     Office of Pesticide Programs
>     EPA
>
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