Cellphones and The Honey Bees?

My brother and I were walking around Taylorsville, Utah yesterday and a honey bee flew at my brother, as bees usually do.  So my brother starts waving his arms at the bee to make it go away.  After a few seconds the bee flew down to the ground and landed on the grass at my brothers feet.  Understand this, that my brother did not touch the bee in any way.  The bee flew to the grass on his own.  After about 10 to 15 seconds the bee flew back up into the air and got no higher than 3 feet when he went down and landed on the sidewalk.  We watched puzzled by the bees behavior.  He just buzzed around on the sidewalk for a minute or two and then crawled around as if he was drunk, and then stopped moving altogether.  And on the sidewalk is where he stayed and never flew again.  He was dead.  We talked about it for a while afterwards, and the only conclusion that we could come up with was that when the bee landed on the grass the chemicals that had possibly been sprayed there affected the bee so drastically that it died due to exposure to the chemicals that were possibly on the lawn.  Maybe its true and maybe its not, but it does give us a valid point to think about.  Maybe its not just cellphones causing problems with the bee population after all.  It could also be the chemicals that we have been using on our lawns and flowers, as well.