randy oliver wrote:

> Thanks Eric, wouldn't expect high levels of systemic insecticides in such
> dust, but likely high levels of foliar treatments.  Will ask them to take
> samples.

Randy, what foliar treatments are you refering to? Earlier Jerry B 
stated "in IL and Indiana - everyone uses treated seed. Very little 
spraying of corn with insecticides, except sweet corn."

99+% of the corn grown in the Midwest is field corn, not sweet corn.

Here's an interesting Canadian study that looked at the contact and 
oral toxicity to honey bees of imidacloprid and clothianidin when used 
as seed corn treatments:
http://www.apidologie.org/articles/apido/pdf/2005/04/M5406.pdf

On page 631 the authors wrote: "Imidacloprid and clothianidin, when used 
as seed corn treatments for CFB control pose no risk to [adult] honey 
bees foraging". [collecting pollen from the tassels of sweet corn]

Paul Cherubini

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