The leaves and stems on my butternut squash have been shriveling. This has been progressing for the past two weeks or so. I doubt it's a watering issue but if anything I think it would be overwatering. I don't see any signs of vine borers and there is no white liquid if I make a cut so I don't think it's bacterial wilt. The main vines seem sturdy and stiff and the stems to the leaves seem more like flimsy straws, especially to the leaves that aren't doing well. I apply a liquid fertilizer (2-2-2) every 2 weeks.