All of my cucumber plants died. The main vine split at the ground level and there seems to be a scale on the outside, then over a 2 week period the leaves all yellowed and the plant died. Thinking Squash vine borer I dissected a vine and found the portion above the split was normal. The issue does not appear related to weather. My first set of plants, I started from seed in my greenhouse and transplanted to the garden Memorial Day. By the end of June they were all dead. I replanted seeds directly in a different part of my garden. The same thing is happening. Help!