I'm 95% sure that I saw 3 O. lignaria on blueberry flowers this spring.
I didn't collect them so cant say%100. I'll be sure and try to collect any I see next
year to positive ID them.
on behalf of Mark Kraemer
Sent: Fri 5/30/2008 12:14 PM
To: Wilson, Michael E; email@example.com
Subject: [BULK or SPAM] RE: [beemonitoring] robbing
Trap nests often attract local Osmia bees if placed out early in year,
before tree bloom, and in a good location. If nest shelters are left
up into late spring and summer the holes will be utilized by wasps which
provision their nests with spiders, at least in central Virginia.
Blueberries would be rather late for Osmia lignaria and not the type of
flower they generally prefer. To establish their nests they need
redbud, boxelder, or other early flowering trees in the area of the
nest boxes. Please let me know if you see them on blueberries.
- Mark Kraemer
>>> mwilso14@... <mailto:mwilso14%40utk.edu> 5/30/2008 10:43 AM >>>
"Did you inquire earlier about trap nests? Have you incorporated that
into your project?"
Yes we did, but no use as of yet. My lab partner found another
southeastern study where
only wasps used trap nests. I don't know how effective they may be in
Anyone have any luck with trap nests in the southeast?
One site has Osmia nesting in fences, but not utilizing the trap nests.
I've seen some
Osmia on blueberries where I put a trap nest, but no use there either.
We have 10 of them
out and will increase that substantially next year, depending on
Sounds like a very different scenario at your locations too. Nearly all
the bumble bees I saw,
which where few, were queens. I would be willing to cooperate
standardization of data collection
if you, and others in nearby regions, would be interested in working
together on that.
<mailto:beemonitoring%40yahoogroups.com> on behalf of nancy lee adamson
Sent: Fri 5/30/2008 10:40 AM
Subject: Re: [beemonitoring] robbing
Thank you very much!! I sent separate thanks to Dr. Mangum, but will
to your questions to the whole group.
I am not sure that robbing only occurs after peak bloom, but last year
noticed that carpenter robbers and honey bee robber followers were
abundant once the bumblebees generally seemed to have moved elsewhere
don't know where). That was at one site last year. At another site
year, on my first visit, carpenter bees were not robbing, but in
visits, they were (and like the other site, there were fewer
generally by that time). These were highbush blueberries.
I only have one site that has rabbiteye blueberry and it is not a
planting. When I visited that, there were primarily worker bumblebees
pollinating. Honey bees were pollinating and robbing, but the number
robber holes seemed lower than in highbush blueberries, and I only
a couple carpenter bees. Earlier, on highbush blueberries, I found a
number of andrenid bees (never robbing), but by the time I monitored
rabbiteye, it was quite a bit later (more than a week), I did not find
andrenids at all. I don't know if they are gone for the season or
other plants with higher amounts of nectar.
I do think visiting several times is helpful (early in the bloom season
later), since a change was very noticeable at sites I visited. I did
that at one site, honey bees were much more abundant compared to 2
sites, both located in wooded mountains.
Did you inquire earlier about trap nests? Have you incorporated that
On Fri, May 30, 2008 at 10:18 AM, Wilson, Michael E <mwilso14@...
> Hi Nancy, sounds like we are doing the same thing. Dr. Sampson also
> an article on this.
> Sampson, B. J., Kanka, R. G., Stringer, S. J. (2004). Nectar robbery
> bees Xylocopa virginica and Apis mellifera contributes to the
> Rabbiteye Blueberry. Journal of Economic Entomology 97(3): 735-740.
> here's the article I have for Dr. Delaplane
> Dedej, S. and Delaplane K. S. (2004). Nectar-robbing carpenter bees
> seed-setting capability of honey bees (Hymenoptera: Apidae) in
> blueberry, Vaccinium ashei, 'Climax'. Environmental Entomology
> I'm noting if each visitor is 'legitimate visit' or 'robbing' and
> that in determining
> the most significant pollinators. At two of my three sites honey
> provided zero pollination that
> I could tell. Carpenter bees over all seemed to be 'pretty good'
> pollinators even though some robbed. The bloom
> is over here, but I think I figured out what I need to do next year.
> certainly need more locations
> as very different things where happening at each location.
> I'm interested in what you said about robbing occurring after peak
> Are you pretty confident
> that it starts after peak bloom? My plans for the 2009 bloom was to
> locations 2 times. I wonder
> if I need to increase the per farm visits to get before, during, and
> peak bloom observations per farm?
> One farm I visited never really had a peak bloom though, it was just
> kind of a slow, steady, modest bloom, they trimmed heavily the
> year due to the frost, and I think
> that must have affected their bloom this year. They had robbing the
> Michael Wilson (UTK grad student)
> -----Original Message-----
> From: firstname.lastname@example.org <mailto:beemonitoring%40yahoogroups.com> <beemonitoring%40yahoogroups.com>
> behalf of Wyatt Mangum
> Sent: Fri 5/30/2008 9:25 AM
> To: email@example.com <mailto:beemonitoring%40yahoogroups.com> <beemonitoring%40yahoogroups.com>
> Subject: Re: [beemonitoring] robbing
> Dear Nancy,
> Dr. Delaplane has work with this. His contact address is
> Dr. Keith S. Delaplane
> Professor of Entomology
> 463C Biological Sciences Building
> University of Georgia
> Athens, GA 30602 USA
> voice (706) 542-1765
> lab 706-769-1736
> fax (706) 542-3872
> ksd@... <mailto:ksd%40uga.edu> <ksd%40uga.edu>
> Kind Regards,
> Dr. Wyatt A. Mangum
> Editor-in-Chief of Apiacta (digital version)
> American Bee Journal Columnist on Honey Bee Biology
> Mathematics Department
> University of Mary Washington
> 1301 College Avenue
> Fredericksburg, VA 22401 USA
> Email: wmangum@... <mailto:wmangum%40umw.edu> <wmangum%40umw.edu>
> >>> "nancy lee adamson" <nladamson@... <mailto:nladamson%40gmail.com>
> 05/30/08 9:14 AM >>>
> I am monitoring bees on various crops, taking visitation counts. On
> blueberries, after peak flowering, carpenter bees cut holes into the
> and rob nectar. These holes are then used by honey bees, as well. I
> been including these in monitoring counts, but realized I should
> remove them. Any thoughts from you all on this? Does anyone know if
> robbers still improve pollination on self- fertile flowers? Thanks
> thoughts. Nancy
> Nancy Adamson
> Graduate Student in Entomology at Virginia Tech
> tel: 540- 231- 6498
Graduate Student in Entomology at Virginia Tech