Splitting trunk on Muscadine Noble grape vine (forum)

GlenMac starts with ...
I don't know why the trunk on my Noble muscadine grape vine is suffering deep splits. I have another Noble in a site that has a little less sun and it has no splits. The vine with the problem is otherwise quite healthy (but dormant now of course). I worry it might suffer rot should we ever get days of rain again. Should I wrap something around the trunk? paint with a sealer? or fill the splits with something? Any ideas very welcome.
Pictures - Click to enlarge

Picture: 1

Time: 31st May 2019 11:58pm

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Original Post was last edited: 7th June 2019 1:19pm
About the Author GlenMac
KINGS LANGLEY,2147,NSW
#UserID: 17646
Posts: 8
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GlenMac says...
This is a better photo of my muscadine Noble's trunk. See how deep and long this fissure is. So what should I do about it? Any advice from Daley's experts? Or the gardeners out there in Oz who have planted these American grapes? (This pix is taken higher up the trunk than the earlier one).

Time: 4th June 2019 11:35am

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Original Post was last edited: 5th June 2019 12:56am
About the Author GlenMac
KINGS LANGLEY,2147,NSW
#UserID: 17646
Posts: 8
View All GlenMac's Edible Fruit Trees

GlenMac says...
The new photo seemed to have disappeared - here it is again.

Time: 4th June 2019 11:41am

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Original Post was last edited: 5th June 2019 12:56am
About the Author GlenMac
KINGS LANGLEY,2147,NSW
#UserID: 17646
Posts: 8
View All GlenMac's Edible Fruit Trees