I've been noticing some little yellow jackets and some wasps with white stripes on them hanging around the hive. Yesterday there were tons of bees swarming at the entrance, so the hive is fighting off intruders. What concerns me is that this is a new hive and I just put a second super on it last week. They are busy building out the new frames AND fighting off intruders. Is there anything I can do to get rid of these other opportunists? It's been really dry and hot here, so I imagine the food supply for outside insects is slim to none. I even considered putting old soda pop in tin pans far away from my bees to draw them away. Any suggestions?