Here's another article that is about disease prevention and discusses leaf thinning. The experiments were done at Cornell and Washington State. I seem to have lost the article I first was looking for.
Dick
Paul E. Lehmann wrote:
I think his problem is with his vines being TOO vigorous already.
I would think that mulching with wood would provide an excellent place for fungi to over winter. The trend here in Eastern US is to cane prune and thereby eliminating much of the older wood that provides sites for fungi to overwinter.
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