This has already been discussed here. See archives. However, it is worth
pointing out how the title you present skews the impact of the actual report. 

> WILD BEE ABUNDANCE AND SEED PRODUCTION IN CONVENTIONAL, ORGANIC, AND
GENETICALLY MODIFIED CANOLA by Lora A. Morandin,a, 1 and Mark L. Winston

> Our study has demonstrated an interesting pattern in which wild bee
abundance is related to improved crop yields, but a genetically modified
crop variety designed to improve yields through weed management might have
the undesired consequence of reducing bee abundance in the field. However,
it is important to note that other factors may be correlated with field type
and be as important to bee abundance. For example, organic farmers tend to
locate farther from established farm areas in order to satisfy minimum
distance regulations regarding proximity to GM fields, possibly resulting in
greater amounts of seminatural habitat around fields. 

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