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