Hi Kim,

In biology we teach our students that plants are superb at producing "designer chemicals".  It's a major way they control pests (think nicotine in tobacco plants), compete with other plants for territory (think juglone in black walnut), and so on.  So I too have been wondering about your question.  I am skeptical about the idea that if any given applied chemical is OK for bees on one plant (like canola) it must therefore be OK for bees on every other kind of plant (like cucumbers).  Plants are very different to each other and I believe that it is a mistake to assume that all of them will handle a given chemical the same way.

I'm open to argument on this point....who has the data?

Christina

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