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IMPACTS OF BT CORN<br />
EFFECTIVE BUILT-IN PROTECTION REDUCES<br />
INSECT DAMAGE AND CAN POSITIVELY AFFECT<br />
YIELDS AND GRAIN QUALITY<br />
In 2003, Bt maize occupied 9.1 million<br />
hectares (22.4 million acres) or 13 percent<br />
of the total global biotech crop area of<br />
67.7 million hectares (167.2 million acres). 29<br />
<strong>Monsanto</strong>’s YieldGard Corn Borer corn<br />
produces a protein derived from the naturally<br />
occurring soil microorganism, Bacillus<br />
thuringiensis (Bt) to provide effective built-in<br />
protection from major lepidopteran insect<br />
pests, including the European corn borer, the<br />
southwestern corn borer, and the pink borer.<br />
Maize pests cause extensive crop damage<br />
worldwide. Global losses due to insect pests<br />
are estimated at 52.6 million metric tons,<br />
which is equivalent to about 9 percent of the<br />
global production of 600 million metric tons.<br />
The estimated value of maize insect crop<br />
losses is $5.7 billion globally. 29<br />
YieldGard Corn Borer corn has provided<br />
superior control of these corn borer pests,<br />
which results in greater yields and<br />
improved economic returns for growers. 30<br />
Field studies evaluating corn yields in the<br />
United States, Argentina, Spain, Germany,<br />
South Africa, China, and the Philippines<br />
showed yield gains from 5 percent to<br />
40 percent. 29, 30 U.S. studies showed average<br />
yield gains of about 5 percent. For Argentina,<br />
the average yield gain was from 8 percent to<br />
10 percent in two studies.<br />
Studies conducted in Spain showed average<br />
yield gains of 5 percent to 11 percent in<br />
four studies. Two field trials in Germany<br />
indicated average yield gains of 12 percent<br />
and 15 percent. South African trials showed<br />
a 10 percent average yield gain. Finally,<br />
five other field studies in China demonstrated<br />
yield gains of 9 percent to 23 percent.<br />
One field study in the Philippines reported<br />
yield gains of 25 percent to 40 percent.<br />
Bt CORN GROWERS AROUND THE WORLD<br />
FIND YIELD BENEFITS.<br />
Yield impacts depend on regional conditions,<br />
levels of pest infestation, and other factors;<br />
but the field data show that corn growers<br />
usually achieve yield and production gains<br />
when they grow Bt corn.<br />
YieldGard Corn Borer corn can also<br />
improve grain quality by reducing levels<br />
of fumonisin mycotoxin in corn grain.<br />
By reducing the amount of insect damage<br />
to corn ears and grain, YieldGard Corn Borer<br />
corn can reduce the points of entry for<br />
Fusarium fungi that produce mycotoxins<br />
such as fumonisin.<br />
Global field trials conducted in multiple<br />
trial sites in Europe, Latin America, and the<br />
United States confirm lower fumonisin levels<br />
in YieldGard Corn Borer corn compared with<br />
the conventional corn control without the<br />
Bt gene. 31-33 Field analysis comparison trials<br />
conducted in the United States in 2001,<br />
demonstrated a 47 percent reduction in<br />
fumonisin levels with Yieldgard Corn Borer corn<br />
compared with conventional non-Bt corn. 34<br />
{ MONSANTO COMPANY 2004 PLEDGE REPORT: PAGES 30-31 }