Babs,
So sorry to hear about these ruthless attackers! We had a major problem with them last year...it was the worst I have ever seen in my life. Hundreds of them would literally hang out at the apiary and two of them would team up and then carry off a single bee, just like those flying monkeys in the Wizard of Oz carrying of Dorthy and Toto. But these yellow jacket subterranean wasps were incredibly effective with team work and they would carry off hundreds of bees per day. It was comical at first, but then I realized they were doing tremendous damage to the bee population.
I did lots of reading, research, asking, etc. Here is what I discovered:
1. They are called yellow jacket subterranean wasps.
2. They build their nests in the ground.
3. They can both sting and bite [I unknowingly plowed a massive nest and received 25+ stings in the head, back of neck, and face. The bites go away in a few minutes. The stings, weeks.
4. Their stings really hurt for many days and puss continued to ooze out of the stings on my head for 2 weeks.
5. Their nests can be easily found and exterminated.
6. The Sacramento/Yolo county mosquito vector control sent out a team and did it for free for us [their number is Phone 800-429-1022 (7:00am-3:30pm Monday-Friday)].
7. There is a specific chemical poison that is applied into the nest in dust form and it is absolutely deadly to these yellow jacket subterranean wasps. I cannot remember the name of the chemical but I believe it is readily available too.
8. Last year at this time, if we tried to eat meat from a barbecue outside, we would literally be attacked by anywhere from 100-200 of these yellow jacket subterranean wasps. It was a major battle just to eat one bite of a steak! This year, we rarely see any of them. So the extermination process was incredibly effective.
9. You can also make a super simple trap by placing oil that was used to fry meat or fish in an open container outdoors [we would find 100-200 yellow jacket subterranean wasps per day in these traps at the height of their invasion].
10. The team that came out from the county did this to search and destroy the yellow jacket subterranean wasps nests:
a. Arrive early in the morning.
b. Position themselves low to the ground then look for the flight paths.
c. Follow the flight paths until they discovered the nest.
d. Dust the nest.
e. End of the yellow jacket subterranean wasps nests and end of their story!
Hope this helps!
Soar
PS There were far too many wasps and nests to kill on an individual basis using the traps. I am posting pics of the traps we used last year and please realize, this was after only one day of use! Crazy indeed!
Oh, I did use a few thousand of the yellow jacket subterranean wasps to do a sort of anger management class...
I would place a freshly cooked piece of meat on a table outside, then grab a fly swatter. I was able to kill approximately 50-100 wasps every 5-10 minutes. It was a great way to redirect my anger into a more productive direction and I became the best ever at killing flying insects with a fly swatter. It really improved my game! I think my record was 7 dead wasps with one swat! But in all honesty, I didn't even make a dent in the overall population of these monsters! Needed the county for help on this project!