Bees for seed production is a big business.  Including issues such as  how to 
get bees to work onions - apparently they can be put off by the  odor.  
Important enough that we've done two years of contract work on  improving bee 
foraging on onions, carrots, and related plants.  Currently  we are talking with 
some soybean folks.
 
Don't be too hasty in assuming bees have no role to play in supposedly wind  
pollinated plants.  Suggest you go to McGregor's book (its online at the  
Tucson Lab site), its dated, but interesting reading.
 
Jerry



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