There IS clearly discoloration on the wood of this branch. Note about 85% of the circumference on left side. Only a small area on the side with the green bark isn't showing it yet. The branch I removed has no visible signs of disease.
I don't think so. This is exactly what happens when the cambium dies on one side of the stem because of desiccation. I think this was exposed to sun/wind that, with draught stress, killed the cambium on that side of the stem. "Classically" this happens in winter when roots are in frozen ground.
Bonsoir, Thanks for keeping me on the bright side of a disaster ;°) It's true that all the affected parts of the trunk and branches were facing South/South-west, that is the hottest hours of the day. Again, several weeks above 30° C, some days 36°C, and no rain for weeks.
