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Scientists refute Greenpeace claim that genetically modified corn caused new insect pest
Date:1/6/2012

An article in the forthcoming issue of the Journal of Integrated Pest Management (JIPM) refutes claims by Greenpeace Germany that the western bean cutworm (WBC), Striacosta albicosta (Smith), is "a new plant pest" that was "caused by genetically engineered corn." The Greenpeace Germany report, which was written by author Richard Then of Testbiotech, offers a "surprisingly simplistic conclusion" regarding the spread of western bean cutworm over the last decade, according to the JIPM authors.

In "Genetically Engineered Bt Corn and Range Expansion of the Western Bean Cutworm (Lepidoptera: Noctuidae) in the United States: A Response to Greenpeace Germany," corresponding author William Hutchison, professor and chair of the University of Minnesota Department of Entomology, and his co-authors maintain that the Greenpeace report fails to consider broader ecological and agronomic factors which explain why the WBC's range has expanded. These additional factors include insect biology, synchrony of insect and corn phenology, reduced insecticide use, increases in conservation tillage, soil type, glyphosate-resistant crops, insect genetics, insect pathogens, pre-existing insect population densities, and climate change.

The JIPM authors focus on several discrepancies of fact and interpretation in the Greenpeace document, beginning with its title, "Agro-biotechnology: New plant pest caused by genetically engineered corn. The spread of the western bean cutworm causes massive damage in the U.S."

Despite the Greenpeace claim, the WBC is neither "new" nor has it caused "massive damage" recently. The WBC was originally collected in Arizona in the 1880s and was considered an economic pest of beans and corn as early as 1915. Over the last decade its range has expanded, but documentation of economically damaging infestations has been relatively limited.

The Greenpeace claim that the WBC has historically "been confined to very li
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Contact: Dr. Thomas E. Hunt
thunt2@unl.edu
402-584-3863
Entomological Society of America
Source:Eurekalert

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