[Pharmwaste] Frogs exposed to herbicides don't know
if they're Arthur or Martha
jbukowsk at jhmi.edu
Thu Jul 19 15:41:58 EDT 2007
I doubt you'll find any study that will find any chemical, pharmaceutical, or even H2O/DHMO to be "100% safe". Seems to me to be somewhat of a neo-Luddite perspective and trotting out the old it's "for the children" doesn't sway me, because we've seen tremendous decreases in infant mortality and childhood morbidity since the Industrial Revolution, despite (more likely, because of) the use of all those evil chemicals.
There are costs and benefits to everything. How many more people would be alive today in developing countries had DDT not been banned because of Rachel Carson's widely exaggerated claims of its hazards? Tens of millions easily.
You seem to imply that "lax" chemical standards are responsible for $55 B in increased children's healthcare costs. One, the article itself that you cited doesn't even make that claim. Two, most of that $55B the authors attributed to one cause, lead poisoning. Three, the figures they came up with aren't worth the paper they're written on imo; they're SWAGS that they were able to get published.
Here's a book you might want to check out this summer.
Saving the Planet with Pesticides and Plastic: The Environmental Triumph of High Yield Farming by Dennis T. Avery
Dennis Avery's new work is an effective antidote to this conventional wisdom that high-yield agriculture poses a threat to human health and the environment. Avery, an agricultural economist, spent 30 years in the federal establishment, serving both in the Department of Agriculture and the State Department.
First, the author shows that the doomsday prophets, including Rachel Carson, are often wrong on the facts. Pesticide residues are not a significant health risk. Indeed, the natural chemicals in foods are more dangerous than pesticide residues, according to Dr. Bruce Ames, the noted biochemist and molecular biologist at the University of California at Berkeley.
The use of DDT, contra Rachel Carson, is not a serious threat to humans and did not decimate the population of wild birds. The EPA administrator banned DDT not because there was demonstrated harm but because he feared a political backlash from readers of Silent Spring.
Second, Avery shows that environmentalists' pleas for chemical-free farming, if successful, would harm both human health and the environment, particularly wildlife. The way to preserve wildlife is to save its habitat. However, the elimination of, or significant reduction in, the use of farm chemicals would mean a substantial increase in land area cropped-and reduction in wildlife habitat. Thus, by preserving habitat, the current system of high-yield farming helps protect wildlife!
Pesticide use, strange as it may seem, is also a boon to public health. Eating more fruits and vegetables can cut cancer risk by 50 percent and markedly reduce heart disease. However, only 9 percent of U.S. consumers eat the recommended five servings of fruits and vegetables per day. Thus, anything that reduces consumption of fruits and vegetables will cost lives. Pesticides are critically important in assuring ample year-round supplies of reasonably priced and attractive fruits and vegetables. Eliminating pesticides would mean lower yields, higher prices and reduced consumption of fruits and vegetables- and higher cancer rates!
>>> Bill Lewry <Bill_Lewry at kcmo.org> 7/16/2007 4:28 PM >>>
An interesting perspective:
However I understand that NONE yet have proven Atrazine to be 100% safe.
I also find it interesting that for some reason you chose to focus on the
work of one scientist.
I think the EU took the correct approach - unless you can show it's safe -
it should not be marketed, and firmly believe that all chemical products
should undergo the same level of testing that pharmaceuticals are subjected
to - perhaps this will offset the $55 (1) billion (est) in increased CHILD
healthcare costs through lax chemical standards in our country. A simple
choice seems self evident here - do we pay now in the form of better
controls and slightly higher prices - or do our children pay with their
lives and health?
Why would anyone oppose or seek to weaken in any way the kid safe chemical
act (2) - or reach ?
Then - in it's most BASIC and simplified terms - it is a recognized fact
that Atrazine is now in much of the national water supply.
Atrazine is designed to KILL living organisms.
I am a living organism (sharing over 90% of my DNA with all others....)
Atrazine is linked to cancer.
Atrazine is probably in my drinking water...........
Atrazine probably isn't needed as properly managed organic farming could
produce better results............. (3)
Simple math in my book - I lay out the facts as known to myself and suggest
that choosing sensibly and wisely will quickly eliminate these problems,
 P.J. Landrigan, C.B. Schechter, J.M. Lipton and others,
Environmental Health Perspectives Vol. 110, No. 7 (2002), pg. 721 and
 Kids Safe Chemical Act. Senate Bill 1391, 109th Congress.
Introduced by Senator Frank Lautenberg. See discussion here and get
the original text of the bill here. Reportedly, the bill is
presently undergoing significant revisions with input from a broad
range of stakeholders.
 Organic farming studies.
<jbukowsk at jhmi.ed
Sent by: <dldebiasi at deq.virginia.gov>,
pharmwaste-bounce <pharmwaste at lists.dep.state.fl.us>
s at lists.dep.state cc
Re: [Pharmwaste] Frogs exposed to
07/16/2007 11:24 herbicides don't know if they're
AM Arthur or Martha
Rachel Carson Syndrome Case 4:
Leopard Frogs and Atrazine Accusations
Tyrone Hayes and Frog Deformities
Finally, there is the research of Dr. Tyrone Hayes, a California
researcher who is the newest media darling in the supposed *global
frog crisis.* Over the past four years, Hayes has been profiled by
National Geographic magazine, Discover magazine, National Public Radio,
and virtually every major newspaper in the country.
Hayes argues that traces of atrazine, one of the most widely used farm
weed killers in North America, are affecting frogs from California to
the Carolinas. The media has run with this theory, placing it at the
heart of all supposed frog ills. As a 2003 editorial in the Baltimore
Sun newspaper stated, *Frogs have been trying to tell us something for
quite a while now. Each spring there seem to be fewer of them, while
increasingly those that do appear are severely deformed; . . . A leading
culprit is believed to be the widely used weed killer atrazine.*35
Yet Hayes doesn*t argue that atrazine kills frogs or causes
deformities. Instead he says that atrazine feminizes male frogs,
chemically castrating them. Therefore, Hayes argues, atrazine *likely
has a significant impact on amphibian populations* and should be
But even Hayes can*t explain why after 30 years of extensive atrazine
use, frog populations are still thriving in the areas where it is
heavily used. Nor can he provide any field evidence that atrazine has
harmed a single frog species anywhere.
Hayes says research in his laboratory shows that at 0.1 parts per
billion (ppb) atrazine, 36% of males at metamorphosis suffer from
under-developed testes.37 At 25 ppb atrazine, only 12% of males at
metamorphosis have under-developed testes. Hayes says that the greater
effects of atrazine at lower concentrations are not unusual for
endocrine-disrupting chemicals. Yet even Hayes admits that these frogs
were simply delayed in their sexual development and would continue
normal development after metamorphosis.
Hayes also found 29% of male frogs *displayed varying degrees of
sex-reversal* at 0.1 ppb atrazine, whereas only 8% of males showed
some sex-reversal at 25 ppb atrazine.38 However, scientists from four
universities have been unable to reproduce Hayes*s laboratory results.
Dr. Ronald Kendall at Texas Tech University, a Hayes critic, says,
*validated information should be replicable.*
In response, Hayes accuses the other researchers of outright lying.
This is a group of individuals whose sole goal is to prove me wrong and
to keep atrazine on the market. Their science is so poor, yet they
continually try to damage or hurt my findings by saying they can*t
reproduce my work under the pretense that they*re doing real science.
I thought only criminals and desperate people lied, not educated people.
My 11-year-old looks over their experiments and sees that they have no
controls. They can*t be that dumb, so they*re lying.39
These are incredibly strong words for a scientific debate, where
research usually is left to speak for itself and to sort out such
debates. If experimental results cannot be replicated, their validity is
understandably questioned. Instead, Hayes has resorted to ad hominem
attacks, using a word that is almost never used in science debates:
Liar. And Hayes is leveling that charge against an entire group of
researchers from several institutions.
If the laboratory results are in contentious dispute, what, if
anything, is happening to frogs out in the real world? Even according to
Hayes*s field research, not much.
Hayes conducted field studies in Utah, Wyoming, Nebraska, and Iowa*in
places where atrazine is used regularly and in places where it is
presumably never used. Hayes found traces of atrazine at all but one
location, a wildlife preserve in Iowa. One water testing lab found no
atrazine in the Iowa preserve*s water and another found only trace
levels at the limit of detection.
Bottom line: Hayes could show no correlation between atrazine levels
and *gonadal abnormalities* in northern leopard frogs at any of the
sites. While more than 90 percent of male frogs from one site in Wyoming
had some *gonadal abnormalities,* three other sites with equivalent
atrazine levels had no or low levels of abnormalities. Atrazine levels
were the same in sites in Utah and Wyoming, yet there is approximately a
900 percent difference in the incidence of abnormalities between the
sites. At one Utah site, no abnormalities were seen despite the presence
of the same atrazine levels seen at the high-incidence site in Wyoming.
Moreover, the Iowa site where no atrazine was found had the same
frequency of abnormalities as four other sites where atrazine levels
were both low and high.
In short, none of the field data makes any sense if atrazine really has
an impact on male frog sexual development. Most damning of all, Hayes
had no trouble finding northern leopard frogs at any of the field sites
he studied. Frogs were abundant at all locations. So much for Hayes*s
claims that atrazine *likely has a significant impact on amphibian
Rather than finding an ecological problem in frogs and then searching
for a cause, Hayes seems to have found a laboratory effect from atrazine
and is now searching for an ecological problem.
Finally, Dr. Hayes made a startling statement in a recent paper he
wrote about the lack of scientific evidence that DDT harmed raptor
birds. Dr. Hayes recently wrote that *Years have passed since DDT was
banned in the United States, but it is unclear how much policymakers and
the public have learned from the case of this dangerous pesticide. DDT
was banned on the basis of even less scientific evidence than currently
exists for the negative impacts of atrazine.*40
Considering the lack of evidence on the *negative impacts of
atrazine,* this says volumes about the DDT paradigm that is currently
driving a sector of the ecological research community and about the
ultra-conservative regulatory stance of the EPA.
James Bukowski, CIH HEM
Environmental Health Officer
Virginia Tech (1980)
>>> "DeBiasi,Deborah" <dldebiasi at deq.virginia.gov> 7/16/2007 11:36 AM
Frogs exposed to herbicides don't know if they're Arthur or Martha
Study alert: A green tree frog.
July 15, 2007
AUSTRALIAN drinking water standards are under scrutiny after
research linked commonly used herbicides to gender-bending in male
The National Health and Medical Research Council has decided to
its drinking water guidelines after miniscule traces of the herbicides
atrazine and simazine were found to turn the frogs into hermaphrodites
creatures with male and female sex organs.
Australian guidelines allow up to 40 parts per billion (ppb) of
in drinking water before it is considered a public health risk. But
scientific studies have found male frogs grow ovaries when exposed to
the chemical at the miniscule level of 0.1ppb in water.
"The current Australian Drinking Water Guidelines specify that
should not be detected in drinking water, and that if it is detected
remedial action should be taken to stop contamination," said research
council spokesman Nigel Harding.
"The guidelines state that if present in drinking water, atrazine
not be a health concern in humans unless the concentration exceeds
"The guidelines are currently under review."
Atrazine, which was banned across the European Union in 2003, has been
used for weed control in Australia for more than 25 years and is the
nation's second most commonly used agriculture chemical agent. It is
sprayed around canola fields, forestry plantations and sugar cane.
There is no legal requirement for atrazine users to notify water
authorities when the chemical is being sprayed.
Dr Tyrone Hayes, an associate professor of integrative biology at the
University of California, presented the findings on the impact of
atrazine on frogs at an address to the Australia Pesticides and
Veterinary Medicines Authority (APVMA), which oversees the continuing
registration of atrazine.
The APVMA's present environmental assessment of atrazine concludes
it is "unlikely that atrazine, when used in accordance with the label
recommendations, will contaminate waterways to any extent likely to
present a hazard to the environment, or to human beings through the
consumption of contaminated drinking water".
However, it acknowledges that after storms levels of atrazine in water
will rise and may temporarily exceed the guidelines.
The manufacturer of atrazine, the Swiss corporation Syngenta, rejects
Deborah L. DeBiasi
Email: dldebiasi at deq.virginia.gov
WEB site address: www.deq.virginia.gov
Virginia Department of Environmental Quality
Office of Water Permit Programs
Industrial Pretreatment/Toxics Management Program
Mail: P.O. Box 1105, Richmond, VA 23218 (NEW!)
Location: 629 E. Main Street, Richmond, VA 23219
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