Answer: If the ailing vine didn't sound so bad, I'd suggest trying to save it, but it sounds beyond help. Yank it out and make room for your healthy plants. I can't say I've ever seen a "fungus", other than downy or powder mildew, attack a pumpkin - I wonder if it could be the frass (droppings) of a squash vine borer? They burrow into the base of vines and leave a pile of tan frass outside their holes. Their damage ultimately results in vine death, with symptoms akin to what you've described. Am I stretching here, or does that sound like a possibility? You can slit open the vine (as long as you're going to pull it up) to confirm or deny the presence of the borer, which is white and plump. If it turns out to be the culprit, visit the webpage again and we'll let you know how to avoid it next year. Best of luck!
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