Do you mean the kind that burrow into the stems at the dirt? I hate those freaking things. They kill kill kill. They ruined so much of all my squash-- butternut, lakota, pumpkin, zuke, just everything! They left some plants, but got most of them. I have been checking evey singe day for those beasts, and I also put aluminium foil around the bottom part of the stems. We may not be talking about the same critters, as they totally left the cucumbers alone and they were amazing. I never had such a great crop of cucumbers before.
I've found squash bores are hard to get rid of, too. I would go get some more plants, and do the aluminim foil. In fact, I have several squash plants I'm growing in pots to put in late July/early august, just in case.