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308RE: [BULK or SPAM] RE: [beemonitoring] robbing

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  • Wilson, Michael E
    Jun 4, 2008
      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.


      From: beemonitoring@yahoogroups.com on behalf of Mark Kraemer
      Sent: Fri 5/30/2008 12:14 PM
      To: Wilson, Michael E; beemonitoring@yahoogroups.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
      the southeast.

      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.

      -Michael Wilson

      -----Original Message-----
      From: beemonitoring@yahoogroups.com <mailto:beemonitoring%40yahoogroups.com> on behalf of nancy lee adamson
      Sent: Fri 5/30/2008 10:40 AM
      To: beemonitoring@yahoogroups.com <mailto:beemonitoring%40yahoogroups.com>
      Subject: Re: [beemonitoring] robbing

      Hi, Michael,

      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
      your project?


      On Fri, May 30, 2008 at 10:18 AM, Wilson, Michael E <mwilso14@... <mailto:mwilso14%40utk.edu> >

      > 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
      pollination of
      > 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
      > 100-106.
      > I'm noting if each visitor is 'legitimate visit' or 'robbing' and
      will use
      > 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
      visit 7
      > 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
      > time.
      > -Thanks,
      > Michael Wilson (UTK grad student)
      > -----Original Message-----
      > From: beemonitoring@yahoogroups.com <mailto:beemonitoring%40yahoogroups.com> <beemonitoring%40yahoogroups.com>
      > behalf of Wyatt Mangum
      > Sent: Fri 5/30/2008 9:25 AM
      > To: beemonitoring@yahoogroups.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
      > flowers
      > 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
      for your
      > thoughts. Nancy
      > --
      > Nancy Adamson
      > Graduate Student in Entomology at Virginia Tech
      > tel: 540- 231- 6498

      Nancy Adamson
      Graduate Student in Entomology at Virginia Tech
      tel: 540-231-6498
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