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US call for doubling of maize refuge areas

Refuge areas for genetically modified insect-resistant Bt maize need to be increased in order to slow the emergence of resistance in western corn rootworms ( Diabrotica virgifera virgifera), warns a study by researchers from two US universities. The authors, Professor Bruce Tabashnik from the University of Arizona and Professor Fred Gould from North Carolina State University conclude that the EPA should more than double the percentage of maize areas planted to mandated refuges to delay insect resistance, encourage IPM and promote more sustainable crop protection. They suggest that the area be set at 50% for single Bt genes and 20% for two or more genes.


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