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  1. #1
    Join Date
    Dec 2010
    Location
    Edinburgh, UK
    Posts
    223

    Default Harvard study on neonics and bee deaths - download full text

    Read about it in THE HARVARD GAZETTE HERE:

    http://news.harvard.edu/gazette/stor...lony-collapse/

    We now have the full text of the Harvard Study by Alex Lu which can be downloaded from this Google Docs link:


    https://docs.google.com/open?id=0B7F...Uzdyb21VRV9Bdw

    DISCUSSION ABSTRACT:


    Discussion

    The magnitude and the pattern of honey bee hive loss
    during the winter months in this study resemble the reported
    symptoms of CCD. The loss of 15 of 16 imidacloprid-
    treated hives (94%) across 4 apiaries occurred
    over a period of 10 weeks following the first hive death.
    Dead hives were remarkably empty except for stores of
    food and some pollen left on the frames (figure 3). The
    dead hives, particularly for those treated with higher dosages
    of imidacloprid, was preceded by the observation
    of dead bees scattered on snow in front of the hives,
    with diminished small clusters remaining the week before
    death. Snow usually fell between weekly hive examinations
    making the observation of scattered dead
    honey bees in front of individual hives noticeable. Although
    this observation is not quite reminiscent of the
    reported CCD symptoms, it is important to consider that
    if these hives were located in a warmer climate region,
    such as in Florida USA where migratory hives overwinter,
    bees exiting the hives would have dispersed some
    distance from the hives and therefore would not be observed
    in front of the hives.

    The replicated controlled design of this in situ study in
    the apiarian setting, and the survival of honey bees in 3
    of 4 control hives (figure 4), eliminate the possibility
    that hive deaths were caused by common suggested risk
    factors, such as long-distance transportation of hives,
    malnutrition, or the reported toxic effect of hydroxymethylfurfural,
    a heat-formed contaminant during the
    distillation process of making HFCS, to honey bees (Le-
    Blanc et al., 2009). We used the same HFCS in both the
    imidacloprid-treated and control hives. The loss of imidacloprid-
    treated hives in this study is also highly unlikely
    due to pathogen infection since the presence of neither
    Nosema nor a large number of Varroa mites was
    observed in hives during the summer and fall seasons.
    In addition, all hives were treated with Apistan strips
    and Fumagillin B, two effective treatments for parasite
    prevention, prior to the winter season. Since all hives
    were considered healthy as they went into fall season,
    those pathogens posed very little threat to the health of
    honey bee hives. The only dead control hive exhibited
    symptoms of dysentery in which dead honey bees were
    found both inside and outside of the hive, which is not
    seen in the other 19 hives.


    Data from this in situ study provide convincing evidence
    that exposure to sub-lethal levels of imidacloprid
    causes honey bees to exhibit symptoms consistent to
    CCD months after imidacloprid exposure.
    Should stressor
    factors other than feeding honey bees with HFCS
    containing imidacloprid cause CCD, the loss of honey
    bees would not occur disproportionally on those imidacloprid-
    treated hives. The survival of the control hives
    unequivocally augments this conclusion. The study hypothesis
    is further supported by the mortality data presented
    in figure 2, which clearly demonstrates a dose-
    response relationship, in which the highest imidacloprid
    dose exterminates hives more quickly than the subsequent
    doses in all 4 apiaries. Although imidacloprid, and
    other neonicotinoid insecticides have been suggested as
    a possible contributing factor to CCD because of its toxicity
    in impairing foraging ability or triggering other
    neuro-behavioral problems (e.g. failure to return to the
    hive) in honey bees at sub-lethal doses (Suchail et al.,
    2001; Rortais et al., 2005; Thompson and Maus, 2007;
    Yang et al., 2008; Mullin et al., 2010), its attribution to
    CCD in the apiary setting has never been documented.
    The results from this study underscore the paucity of
    research concerning the sub-lethal effects of pesticides
    on CCD, particularly of neonicotinoids throughout the
    yearly life cycle of entire honey bee colonies under
    natural conditions (Maini et al., 2010; Spivak et al.,
    2011).

  2. #2
    Join Date
    Feb 2009
    Location
    Pigeon Falls, WI
    Posts
    2,527

    Default Re: Harvard study on neonics and bee deaths - download full text

    Leer Family Honey Farm-Shannon Leer

  3. #3
    Join Date
    Jul 2008
    Location
    Limestone Co, Alabama
    Posts
    1,674

    Default Re: Harvard study on neonics and bee deaths - download full text

    Quote Originally Posted by Beeslave View Post
    Catch the Buzz article...
    Now that is way funny. I wonder what other kinds of battery powered vibrating gizmos are out there that will also pollinate tomato blossoms.
    Scrapfe---Never believe anything in politics until it has been officially denied.--Otto von Bismarck.

  4. #4
    Join Date
    Mar 2012
    Location
    Cameron, Texas, USA
    Posts
    99

    Default Re: Harvard study on neonics and bee deaths - download full text

    I am not saying what is causing CCD, but the science is still in the air. The insecticide is question was introduced in the 90's, but CCD was noticed in the 80's it just had a different name we need to be open to all possibilities.
    http://tais.tamu.edu/newsletter/pdf/...Newsletter.pdf

  5. #5
    Join Date
    Sep 2009
    Location
    Millbury, MA, USA
    Posts
    1,789

    Default Re: Harvard study on neonics and bee deaths - download full text

    If you read the study and not the press hype, all it proved is that if you feed bees insecticide they die. Nothing new or novel about that finding and certainly not the cause of CCD. Not every CCD hive was fed HFCS. Further, none of my hives collapsed this year and I had dead bees in the snow. It's a terrible study. Amazing that Harvard would have approved it.

  6. #6
    Join Date
    Jan 2010
    Location
    Stromness, Scotland
    Posts
    124

    Default Imidacoprid linked to CCD

    Quote Originally Posted by camero7 View Post
    If you read the study and not the press hype, all it proved is that if you feed bees insecticide they die. Nothing new or novel about that finding and certainly not the cause of CCD. Not every CCD hive was fed HFCS. Further, none of my hives collapsed this year and I had dead bees in the snow. It's a terrible study. Amazing that Harvard would have approved it.
    I have read the study and it is very good. What makes you think it's bad?

    I very much recommend watching this video which shows a talk of the author of the study explaining why he did it and he also gives background information about the shocking results:

    http://worcestercountybeekeepers.com...lapse-disorder

  7. #7
    Join Date
    Dec 2005
    Location
    Brasher Falls, NY, USA
    Posts
    26,149

    Default Re: Harvard study on neonics and bee deaths - download full text

    Quote Originally Posted by Mrobisr View Post
    but CCD was noticed in the 80's
    Really? How so and what was it called then?
    Mark Berninghausen "That which works, persists."

  8. #8
    Join Date
    Feb 2006
    Location
    Herrick, SD USA
    Posts
    4,230

    Default Re: Harvard study on neonics and bee deaths - download full text

    I cant reference the exact year, if it was the 80's then it was the early 80's. They called it disappearing disease. I remember having bought some queens from Parks that year and getting a call later in the summer from them asking if I had noticed any disappearing disease. I thought he was joking at first but then he related a lot of experiences some folks out in California were experiencing. Of course this was the good old days of beekeeping when you could easily get devastated with massive losses from foliar spraying. Of course there was the federal indemnity program that reimbursed you if you got your claim in early enough before the funds ran dry.
    "People will generally accept facts as truth only if the facts agree with what they already believe."- Andy Rooney

  9. #9
    Join Date
    Mar 2012
    Location
    Cameron, Texas, USA
    Posts
    99

    Default Re: Harvard study on neonics and bee deaths - download full text

    Quote Originally Posted by sqkcrk View Post
    Really? How so and what was it called then?
    And while the rest of us try to logically figure out what is happening to our bees you are hung up on the name versus the symptoms/end results, lol.

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