advise re yellow jacket nest down in porch
i've sprayed, poured bleach, stuffed cloth in cracks.The wasp seem to be damaging the cement. I'm afraid it's a big nest and getting bigger........ help!
Jackson County Colorado insects
Yellowjacket nest expansion has peaked for the year. And very soon it will be abandoned. Yellowjackets produce annual nests, starting in spring from a single queen, and nests are abandoned - and not subsequently reused - in late summer.
If you can wait, this should be resolved on its own by early October.
Some information on yellowjackets is at: http://bspm.agsci.colostate.edu/files/2013/03/Yellowjackets.pdf