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1 Pesticides suspected in mass die-off of bees Text excerpted from March 29, 2012|By Eryn Brown, Los Angeles Times
2 Scientists have identified a new suspect in the mysterious die-off of bees in recent years � a class of
3 pesticides that appear to be lethal in indirect ways. The chemicals, known as neonicotinoids, are designed
4 to target a variety of sucking and chewing insects, including aphids and beetles. Bees are known to ingest
5 the poison when they eat the pollen and nectar of treated plants, though in doses so tiny that it was not
6 seen as a threat.
7 A study published online Thursday by the journal Science indicate that the pesticides are not altogether
8 benign. The study used miniature radio frequency chips to track honeybees and found that the pesticide
9 impaired their ability to navigate back to the hive after a feeding expedition.
10 Beekeepers became alarmed that honeybees were vanishing from their nests across the U.S. in the fall of
11 2006 � victims of a perplexing and pervasive malady now known as colony collapse disorder that wiped
12 out as many as 90% of bees, in some cases. Scientists don't know exactly why the ailment strikes, but
13 they believe it results from a combination of habitat degradation, infection by pathogens and parasites and
14 pesticide use. Researchers have also documented sharp declines in bumblebees, which are important crop
15 pollinators but are not domesticated.
16 Neonicotinoid pesticides were developed to eradicate insects without threatening mammals. The
17 chemicals, which are incorporated into the tissues, leaves and flowers of plants, target the central nervous
18 system, leading to paralysis and death. Farmers began using them in the early 1990s.
19 Past studies have explored effects of neonicotinoids in the lab, finding that they might harm bees'
20 memory, learning and orientation. But the new study is among the first to examine the pesticides' effects
21 on bees under real-world conditions.
22 The study led by researchers from the French National Institute for Agricultural Research, or INRA,
23 focused on honeybees, which have been victimized by colony collapse disorder throughout the Northern
24 Hemisphere.
25 First they glued special radio frequency identification tags to the bees' thoraxes. Then they fed the bees
26 sublethal doses of a neonicotinoid and monitored the insects as they attempted to return to the hive.
27 The research team discovered that the "intoxicated" bees were about twice as likely as unexposed bees to
28 die because they couldn't find their way home. Computer simulations suggested that these no-shows could
29 cause hive populations to crash in a matter of weeks, said study coauthor Mickael Henry, a researcher at
30 INRA in Avignon. The weakened colonies would be especially vulnerable to environmental
31 stresses such as climate change or disease, he added.
32
33 The new findings lend support to the notion that pesticides contribute to colony collapse, but
34 leave open the likelihood that habitat destruction and illness play a role too, scientists said.
35 "There are a whole lot of things that stress the honeybees," said Eric Mussen, a honeybee
36 specialist at UC Davis. "You can't point your finger at one thing and say, 'That is the problem.' "
37 Mussen cautioned against singling out neonicotinoids when other pesticides could have similar
38 effects on bees. Besides, he said, many insects have built up immunity to neonicotinoids, so
39 farmers are likely to switch to different pesticides anyway.
B: Bees released at a random location a kilometer away from the hive. Vertical axis shows relative number of bees returning to hive (1 = 100%)
Graph from: Henry, M., Beguin, M., Requier, F., Rollin, O., Odoux, J., Aupinel, P., Aptel, J., Tchamitchian, S., & Decourtye, A. (2012). A Common Pesticide Decreases Foraging Success and Survival in Honey Bees Science
1)http://articles.latimes.com/2012/mar/29/science/la-sci-bees-pesticides-20120330
2)http://qz.com/107970/scientists-discover-whats-killing-the-bees-and-its-worse-than-you-thought/
3)http://nbba.wordpress.com/2012/05/30/pesticides-suspected-in-mass-die-off-of-bees/
4)http://articles.latimes.com/keyword/bees/featured/2
5)http://b2science.org/news?page=16
6)http://www.nytimes.com/2014/03/23/world/asia/nsa-breached-chinese-servers-seen-as-spy-peril.html?_r=0
7)http://www.pdsgsnm.org/pesticides-pd/220-2/
8)http://www.truthdig.com/eartotheground/item/scientists_find_potential_clue_to_bee_mystery_20120330
9)http://nbba.wordpress.com/
10)http://en.wikipedia.org/wiki/Colony_collapse_disorder
11)http://www.stpeterscollege.ca/library/new/Past_Lists.php
12)http://www.bibliotecapleyades.net/ciencia/ciencia_bees01.htm
13)http://en.wikipedia.org/wiki/Optimal_virulence
14)http://www.mnn.com/earth-matters/animals/stories/researchers-find-alarming-decline-in-bumblebees
15)http://www.natureserve.org/conservation-tools/data-maps-tools/digital-maps-distribution-five-pollinator-species
16)http://en.wikipedia.org/wiki/Insecticide
17)http://www.plantphysiol.org/content/124/2/507.full
18)http://en.wikipedia.org/wiki/Special_Period
19)http://www.aei.org/article/energy-and-the-environment/bee-deaths-reversal-as-evidence-points-away-from-neonics-as-driver-pressure-builds-to-rethink-ban/
20)http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3338325/
21)http://www.motherjones.com/tom-philpott/2013/07/bee-colony-collapse-disorder-fungicides
22)http://inra.academia.edu/DominiqueFournier
23)http://freesoil.org/wordpress/?page_id=46
24)http://en.wikipedia.org/wiki/Northern_Hemisphere
25)http://jeb.biologists.org/content/215/22/3981.full
26)http://www.domain-b.com/environment/20120330_pesticides_killing_oneView.html
1. 27https://www.causes.com/actions/1657802-tell-the-epa-to-make-chemical-companies-accountable-for-their-bee-killing-pesticides
2. 28http://www.nature.com/news/simulations-back-up-theory-that-universe-is-a-hologram-1.14328
3.29http://usnews.nbcnews.com/_news/2012/03/29/10921493-neonicotinoid-pesticides-tied-to-crashing-bee-populations-2-studies-find
4.30http://www.domain-b.com/environment/20120330_pesticides_killing_3.html
5. 31http://www.niehs.nih.gov/research/programs/geh/climatechange/health_impacts/mental_health/
32
1.33 http://eartheasy.com/blog/2012/04/new-studies-find-pesticide-a-cause-of-bee-colony-collapse/
2.34 http://www.ecollegetimes.com/student-life/pesticides-suspected-in-mass-die-off-of-bees-1.2722443
3.35 http://homeorchard.ucdavis.edu/?blogstart=641&blogasset=45538&close=yes
4.36 http://homeorchard.ucdavis.edu/?blogstart=641&blogasset=45538&close=yes
5.37 http://ucanr.edu/sites/VCMG/?blogtag=neonicotinoids&blogasset=36861
6.38 http://entomology.ucdavis.edu/?blogtag=neonicotinoids&blogasset=45538
7.39 http://blogs.scientificamerican.com/science-sushi/2011/07/18/mythbusting-101-organic-farming-conventional-agriculture/