A few years ago I had unexpected, months long healthy zucchini plants here in N. Virginia. No squash bugs, even in July, by which time I am usually out there spraying with water, waiting a few minutes, then squashing as many adults and juveniles as I could as they climb stems, leaves, and fence wire to avoid the water. Didn't know why they weren't there this particular year. That fall, as I pruned a nearby overgrown bush, I had to back off as I ran into a medium sized paper wasp hive, don't know the species. Don't know this for certain, but I suspect the wasps so close to my zucchini kept them mostly pest free, and us supplied with zucchini longer than we ever experienced it before.
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