I've discovered that several people
are working on a serious robotic solution to weed control all around
the world.
In my opinion the little
guy pictured to the right has the most promise for widespread
acceptance.
He seems to be small enough to make mass production possible and I
would imagine any successful product would need to function on a
minimum of power. A happy ending would be some sort of solar docking
bay the robots returned to when they got low on juice.