I am really sorry to hear about your situation. Before we go too far, can you describe the bee hive. Is it a neighbors honey bee colony (i.e., in square boxes the size of a filing cabinet). Is the nest in the ground and the bees are exiting through a hole? If it's the latter, can you describe the bees? Are they fuzzy, yellow, black and maybe orange, or are they yellow and black striped? 

I will say, regardless of what they are, there are no real repellants. For yellowjackets there are traps which you can use to trap them out. Let me know what you have and I'll do my best to come up with solutions. 

Best,
Andony 

Andony:  This is our colony, sitting in the corner of our garden in a Cathedral Style, horizontal top bar hive (from BackYard Hive).  I recently opened the hive and moved the false wall in the center of the hive to the back wall, doubling their space in the hive.  I received this colony as a package from Broadus Bees here in Bend one year ago.  John

Sorry John, your first message was clear but I did not read it properly. Manipulating the colony should not have made them persistently aggressive. Aggressiveness can be the result of a number of factors, most prominently shortage of incoming nectar and pollen. Another key factor is the queen. If the colony is queen less it can be aggressive. Also, some queens give rise to workers that are more aggressive and changing the queen can help reduce aggression (although it will take a month before the workers change over to see this effect). Finally, I am not sure how much experience you have, but many beginners are not able to manipulate colonies in a way that keeps the bees calm. If the latter is the case, then you should find a mentor through the Central Oregon Beekeepers Association to look over your technique. But, there is not a repellant for a situation like this.

Best,
Andony