My columnar aspen trees are infested with wasps, what do I do!?!?!?
I think I had an aphid problem, which is attracting the wasps, and I can't see to find a wasp nest but there could be one buried in one of the trees (there are three total). Went to get some traps last night and everyone is sold out so I made some homemade ones out of pop bottles.
Anything else I can do? Can I spray the tree with something to keep the wasps away?
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