Having bee hives it is almost a ‘given’ that there will be SHB in it. You finding 5 is a long way from an infestation, the bees will control the issue. SHB can fly and their sole aim is the smell honey and get past the guard bees and into the hive.
You can sprat a half a cup of salt, a cup of cleaning vinegar to 4 litres of water into a pressure spray and liberally treat under and to about 1 metre away from the hive on the ground where the SHB go to lay eggs. It will also kill the weeds and will not do any harm to the bees.
Jeff is right, some forum members even object to you being able to re explain something you have written to make it clearer to the reader, for some reason. For me the clearer you can explain something the better it is for all involved except those that want to nit-pick.