Press Statement
Gordon does a Tony: falls for GM hype
19 June 2008
Fact: GM crops dont increase yields, do have negative health impacts
Against all the evidence and in direct opposition to the recommendations of
his Chief Scientist [1], Gordon Brown, like his predecessor, is being
bamboozled by PR from the Agrobiotech lobby that GM crops can feed the
world.
Contrary to the claims of some government ministers that are there are no
scientific arguments against GM crops, there is a strong body of published
evidence that shows GM crops do not increase yields and also indicating
negative health impacts for livestock eating GM feed and potentially for
humans consuming produce from those animals. This research is set out below.
[2]
But the main argument against GM crops is that they reinforce an outdated
model of agriculture that is wholly unsuited for adapting to and contending
with the conditions that climate change and more costly, scarcer oil bring for
global food security. [3]
Patrick Holden, Soil Association director said,
"The GM industry is desperate to prove it offers any benefits beyond the
self-interested, commercial one of locking farmers into dependency on its own
patented seeds and linked inputs of pesticides and fertilisers. The evidence
after decades of claims is that GM crops are no better and often poorer in
terms of yields, and more worryingly that there are real animal and human
health concerns.
"GMs greatest flaw is that it reinforces agricultures inherently
unsustainable reliance on vast inputs of fossil-fuel derived inputs in the
form of fertilisers and pesticides which are becoming economically, as well
environmentally unaffordable. Poor farmers in developing countries cannot
afford expensive chemicals and even big arable producers in the UK question
their viability as fertiliser costs double in price to over #350 a tonne. [4]
GM crops will add to climate change, by requiring the added inputs of the same
old chemical fertilisers that consume half of all the energy used in
agriculture, so giving off vast amounts of damaging greenhouse gases. [5]
"The Prime Minister would do better to listen to his Chief Scientist at Defra,
Professor Bob Watson, who chaired the recent international agricultural
assessment that concluded business as usual is no longer an option and
called for a shift to agroecological food production. The assessment
questioned GMs claims to be the solution to global poverty, hunger or climate
change and in contrast inclined towards organic, causing the GM
representatives to storm out of the process." [6]
Ends
For media enquiries please contact Clio Turton, Soil Association senior press
officer, 0117 914 2448 / cturton@soilassociation.org
Notes to editor:
[1] Professor Bob Watson, Chief Scientist at Defra, chair of the International
Assessment of Agricultural Knowledge, Science and Technology for Development
(IAASTD). Previously Chief Scientist at World Bank. Leading expert on climate
change. Discovered the Ozone Hole whilst working at NASA.
[2] Scientific evidence of health impacts of GM crops:
Despite GM industry claims, over a dozen GM feeding trials (12 animal, 1
human) show negative health impacts of GM:
a.. Russian rat trial of GM soya: high mortality and stunted growth in
offspring (Ermakova, 2005)
b.. Italian mice trial of GM soya: metabolic effects on body organs
(Malatesta et al, 2002 and 2003; Vecchio et al, 2004)
c.. FSA-commissioned human trial of GM soya by Newcastle University: GM DNA
transfers out of food into the bodys gut bacteria (Netherwood et al, 2004)
d.. Monsanto rat trial of GM maize: changes in body organs indicating toxic
effects (report by Monsanto, 2002; review by Dr Pusztai, 2004; Siralini et
al, 2007)
e.. Aventis chicken trial of GM maize: mortality doubled and significant
change in composition of meat (reports for the Chardon LL hearing, 2002;
review in Food safety contaminants and toxins, CABI publishing, 2003)
f.. Aventis rat trial of the novel protein of GM maize: reduced body weight
and metabolic effects (same references as for Aventis chicken trial)
g.. UK study on sheep: in a few minutes, the genes in the GM maize move into
the bacteria in the mouth, changing their characteristics (Duggan et al, 2003)
h.. Monsanto rat trials of GM oilseed rape: reduction in body weight and
increased liver weight (significant as the liver is the organ of
detoxification) (US FDA, 2002; Opinion of the Scientific Panel on Genetically
Modified Organisms, 2004)
i.. Australian mice trial of GM peas: allergic reactions, including
inflammation of lungs (Prescott et al, 2005)
j.. Calgene mice trials of GM tomatoes: gut lesions and 7 of 40 died within
two weeks (review in Food safety contaminants and toxins, CABI publishing,
2003)
k.. UK Government-commissioned rat trial of GM potatoes by Rowett Research
Institute: gut lesions (Ewen and Pusztai, 1999)
NB: These studies were all designed to identify health impacts; the animal
trials often referred to by the GM companies as showing no negative impacts
are largely irrelevant as proof of safety, because they are mostly studies
carried out for commercial purposes on the efficacy of the feed, rather than
toxicological studies involving tissue analysis.
GM Crop do not increase Yields: the Science
GM crops in general
a.. Firstly, the current generation of GM crops were modified for insect
resistance and weed control), not to increase the intrinsic yield capacity of
the plant.
b.. An April 2006 report from the United States Department of Agriculture
(USDA) states that currently available GM crops do not increase the yield
potential of a hybrid variety. In fact, yield may even decrease if the
varieties used to carry the herbicide tolerant or insect-resistant genes are
not the highest yielding cultivars. (Fernandez-Cornejo, J. and Caswell, 2006)
c.. UN Food and Agriculture Organization 2004 report on agricultural
biotechnology acknowledges that GM crops can have reduced yields (FAO, 2004).
d.. 2003 report published in Science stated that in the United States and
Argentina, average yield effects [of GM crops] are negligible and in some
cases even slightly negative. (Qaim and Zilberman, 2003).
e.. Yields of both GM and conventional varieties vary - sometimes greatly -
depending on growing conditions, such as degree of infestation with insects or
weeds, weather, region of production, etc. (European Commission, 2000)
Roundup Ready (RR) GM soya
Studies from 1999 - 2007 consistently show RR GM soya to yield 4 12% lower
than conventional varieties:
a.. A 2007 study by Kansas State University agronomist Dr. Barney Gordon
suggests that Roundup Ready soya continues to suffer from a yield drag: RR
soya yielded 9% less than a close conventional relative.
b.. A study by University of Nebraska agronomists found that RR soya
varieties yielded 6% less than their closest conventional relatives, and 11%
less than high yielding conventional lines (Elmore et al, 2001). This 6%
yield drag was attributed to genetic modification, and corresponds to a
substantial loss in production of 202 kg/ha.
c.. In 1998 several universities carried out a study demonstrating that, on
average, RR soy varieties were 4% lower in yield than conventional varieties
(Oplinger et al., 1999). These results clearly refuted Monsantos claim to the
contrary (Gianessi, 2000).
Yields of GM soybeans are especially low under drought conditions. Due to
pleiotropic effects (stems splitting under high temperatures and water
stress), GM soybeans suffer 25% higher losses than conventional soybeans(
Altieri and Pengue, 2005)
5 studies between 2001 -2007 show that glyphosate applied to Roundup Ready
soybeans inhibits the uptake of important nutrients essential to plant health
and performance. The resultant mineral deficiencies have been implicated in
various problems, from increased disease susceptibility to inhibition of
photosynthesis. Thus, the same factors implicated in the GM soya yield drag
may also be responsible for increased susceptibility to disease. (Motavalli,
et al., 2004; Neumann et al., 2006; King, et al.,2001; Bernards,M.L, 2005;
Gordon, B., 2007).
The yield drag of RR soya is reflected in flat overall soybean yields from
1995 to 2003, the very years in which GM soya adoption went from nil to 81% of
U.S. soybean acreage. By one estimate, stagnating soybean yields in the U.S.
cost soybean farmers $1.28 billion in lost revenues from1995 to 2003 (Ron
Eliason, 2004).
More recent evidence shows that the kilogram per hectare ratio of soybean has
been in decline since 2002, leading to the conclusion that RR soy does not
have an impact on yield (ABIOVE, 2006a).
Bt Maize
Only GM maize has shown a persistent trend for yield increase, but even here
the rate of increase is no greater than those being achieved by conventional
varieties.
a.. A US study conducted under controlled conditions demonstrated that Bt
maize yields anywhere from 12% less to the same as highly similar, but
conventional varieties (Ma & Subedi, 2005).
Bt Cotton
Despite the claims, Bt cotton has delivered no significant impacts in real
terms:
a.. Average cotton yields have increased 5-fold since 1930, surging from
1980 to the early 1990s. Cotton yields then went flat, and stagnated during
the seven years of GM cottons rise to dominance. The steep yield and
production increases in 2004 and 2005 were chiefly attributable to excellent
weather conditions (Meyer et al., 2007).
b.. Bt cotton, introduced to Australia in 1996, has not offered a boost to
the cotton sector, and since its adoption has not provided improvements in
either yield, or quality (ISAAA, 2006b).
c.. Cotton South Africa show constant yield levels before and after adoption
of Bt cotton (Witt et al 2005, cited in FoEI Who Benefits 2007), in
contradiction to ISAAA claims that Bt has brought about a 24% yield increase
in the region.
d.. Outbreaks of the secondary pests that are not killed by the Bt
insecticide have rendered Bt cotton ineffective in China (Connor, S., July 27,
2006), and are also becoming a problem in North Carolina (Caldwell, D. 2002)
and Georgia (Hollis, P.L., 2006).
e.. An article in Nature Biotechnology notes that the poor performance of Bt
cotton varieties used in India (which were developed for the short U.S.
growing season) is linked to the loss of their insecticidal properties late in
Indias longer growing season, and because Bt cotton insecticide is not
expressed in 25% of the cotton bolls of Indias preferred hybrid cotton
varieties (Jayaraman, K.S., 2005)
[3] Agriculture, like all sectors, must cut its greenhouse gas emissions that
drive climate change by 60-80%. Detailed studies of ten agricultural sectors
by Cranfield University for Defra, and earlier studies of five other
vegetables, show that organic farming uses on average around 26% less energy
per tonne of output than conventional systems
[4] In the UK, the price of nitrogen fertiliser has doubled over the past year
to around #330 per tonne. With oil currently at over $130 a barrel and with
OPEC warning it could reach $200 by the end of the year, it has been suggested
that the price of fertiliser could hit #500 a tonne. At these prices, the
claimed efficiency of fossil-fuel and fertiliser dependent industrial farming
begins to collapse.
[5] The environmental imperative of cutting greenhouse gas emissions by 60-80%
across all sectors to curb dangerous climate change already make intensive
agricultures dependence on nitrogen fertiliser unsustainable:
a.. The manufacture of nitrogen fertiliser is the main use of energy in
agriculture, accounting for 37% of total energy use Agriculture in the UK,
2004
b.. Globally agriculture is the single largest source of the powerful
greenhouse gas, nitrous oxide over 310 times more damaging than carbon
dioxide
c.. For each tonne of fertiliser made 6.7 tonnes of carbon dioxide
equivalent greenhouse gases are emitted
d.. Fertiliser manufacture is also a major user of water, requiring 37
tonnes of water to make 1 tonne of nitrogen fertiliser
Organic farming does not use artificial chemical fertilisers, instead building
soil fertility through crop rotations and particularly the use of clover that
fixes nitrogen naturally from the atmosphere using the Suns energy and
photosynthesis. Clover can fix 200 kg of nitrogen per hectare over a year.
Average applications of N fertiliser across all arable and grassland are 110
kg/ha (arable = 150kg/ha; grassland = 77kg/ha). Fertiliser Statistics, 2005
report, AIC)
6. Representatives of the biotechnology industry, for example, stormed out of
the negotiations earlier this year, arguing that the potential of GM crops to
help poor farmers and comabat global warming was being overlooked and undue
weight given to alternatives such as organic farming, NewScientist feature on
IAASTD report, 5/4/08.
For full references for note [2] above please see the following press release:
'Soil Association report shows GM crops do not yield more - sometimes less '
http://www.soilassociation.org/web/sa/saweb.nsf/848d689047cb466780256a6b00298980/3cacfd251aab6d318025742700407f02!OpenDocument
For further comment and information contact the Soil Association Press Office
T: 0117 914 2448 E: press@soilassociation.org ISDN: 0117 944 6711
Soil Association, the UK's leading environmental membership charity
campaigning for people and planet-friendly food and farming
South Plaza, Marlborough Street, Bristol BS1 3NX
http://www.soilassociation.org
Clio Turton
senior press officer
0117 914 2448
07795 562 556
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