It is official, I killed the nest. I already posted my first attempts here, but that didn’t quite take care of it. The problem was that there wasn’t a good seal to the ground. The wasps would eventually find a way to squeeze under the jar.
After I noticed this, it was clear that the water wasn’t working because they were always still alive afterwards. But I wanted to keep going with the glass thing, because it seemed to have promise. And I liked seeing them stuck in the glass jar, unable to get out.
The next time I saw them squeezing under the bottom of the jar, I put a couple of shovel’s full of wood chips around the edge of the jar. Then I watched them. I would also mention that there was nothing magic about the wood chips, there just happened to be a pile sitting there, so I used that. I would think that dirt would work just as well. But if it doesn’t, use wood chips, that is what worked for me.
I would go look at the jar every day at a time when the wasps would normally be active. I would watch (from a safe distance) to see if there were any finding their way in or out. If I saw even one that appeared to be able to get into or out of the jar, I would add wood chips and wet down the area in hopes of closing any holes. After several days or maybe a week, I stopped seeing the wasps flying around inside the jar.
I left the jar there with no activity for a few more days because I didn’t want to ruin a good thing. Eventually, I took the jar off and looked around. I couldn’t see much, but I did see four or five dead wasps in the hole and none that were alive. I covered the hole with wood chips and then a little water and hopefully that is the end of that.
I think what happens is that with the jar over the hole, the wasps think they can get out, and they just fly around in the jar with hopes of collecting food and doing wasp things. If you were to put something dark over the hole, the wasps would just dig another hole (or so I’ve heard). So if you leave the wasps with a little bit of hope of getting out, they will eventually die of starvation. And I think my nest is officially dead. And I didn’t use any pesticides or harmful chemicals.