Robber feral bees

I had an experience with feral robber bees this weekend. I reduced the entrance, then put Vicks vapor rub above the entrance, then covered with a wet sheet. Decided to leave sheet on all night and to arrow is a rain day.

Patricia,
Just wondering, how could you tell they were feral?

adding a chicane in front of the entrance might be a bit easier and is generally fairly effective.

My bees are 3 banded Italian these bees are 2 banded and a black butt and a large spot behind the eyes and very aggressive . I put up a screen on the hive and an inside feeder. I closed off any escapes at the top. I can't do anything else but pray.

Patricia,
Robbing can be the result of several reasons and once it starts, it is difficult to stop. I have reduced entrances down to nearly a half inch wide to try to stop robbing. Some causes of robbing are from leaving old comb out where the bees can find it, feeding in front of the hives or out in the open around the hives. Please don't mistake my questions for being rude, however, in your picture, that paper plate with sticks in it, sitting on that hive, is that an open bee feeding station?

are there other beekeepers in your vicinity? those could easily be someone's domestic bees robbing yours.

using a chicane is still an option. it amounts to placing a barrier in front of the entrance that bees must navigate around to enter the hive. that sometimes works when reducing the entrance does not.

Yes today I put a screen up to make do untitled the proper one for hives comes in. As far as I know the nearest hives are 10 miles from me this is why I am assuming these bees are feral as well as aggressive.