Kirk it is an unfortunate fact that some of the worst weeds we deal with in 
this country are also very good honeybee plants.  The Knapweeds are one 
example of this.  This is also the reason that the greenies would like to 
remove the European Honey Bee from North America.
The damage done to the environs of our range lands by these weed is huge. 
It is not possible to exterminate them with any control measures.  What is 
hoped for is the same level of control that is exerted on native plant 
species.  Bio diversity is a critical element in our world.  Bees that have 
diverse forage are healthier that bees on a mono crop.
In our area bee keepers are blamed for the spread of Sweet Clover.  Purple 
Loosestrife has the potential to decimate our wetlands by out competing 
plant and animal species found in those wetlands.  Canada Thistle is a 
terrible weed for range as well as crop land.  Honeybees love it.
Dave
South East Idaho 

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