Agriculture Reference
In-Depth Information
Table 4. Summary of selected studies on the effects of genetically
engineered crops on yields, pesticide use, and net returns
Effects on
Crop/researchers/date
of publication
Data
source
Pesticide
use
Net
returns
Yield
Herbicide-tolerant soybe a ns
Delannay et al., 1995
Experiments
Same
na
na
Roberts et al., 1998
Experiments
Increase
Decrease
Increase
Arnold et al., 1998
Experiments
Increase
na
Increase
Marra et al., 1998
Survey
Increase
Decrease
Increase
Reddy and Whiting,
2000
Experiments Same
na
Increase
Duffy, 2001
Survey
Small
decrease
na
Same
Fernandez-Cornejo et al.,
2002 1
Survey
Small
increase
Small
increase
Same
McBride & El-Osta,
2002 2
Survey
na
na
Same
Bradley et al., 2004
Experiments
Same
na
na
Marra et al., 2004
Survey
Same
na
Increase
Herbicide-tolerant cotton
Vencill, 1996
Experiments
Same
na
na
Keeling et al., 1996
Experiments
Same
na
na
Goldman et al., 1998
Experiments
Same
na
na
Culpepper and York,
1998
Experiments Same
Decrease Same
Fernandez-Cornejo et al.,
2000 1
Survey
Increase
Same
Increase
Adhicari et al. 2000
Survey
na
na
Increase
Herbicide-tolerant corn
Fernandez-Cornejo and
Klotz-Ingram, 1998
Survey
Increase
Decrease
Same
Ferrell and Witt, 2002
Experiments
Same
na
Small
increase
McBride & El-Osta,
2002 2
Survey
na
na
Increase
Parker et al., 2006
Experiments
Same
na
na
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