A question--with snarl--about grafted roses
This was a hot dry summer with the water table, apparently, unusually low, but almost all of our several hundred roses survived. Two unexpected losses were my moss rose 'Comtesse de Murinais', which had held out for several years in a bad spot, and a handsome and rather rare striped Gallica, 'Mecene', thriving down in the bottom of the garden close to the ditch and its water supply. Both of these roses were grafted.
Well, the Comtesse appears to be gone entirely, even though it had just begun to sucker off its rootstock; the only rose in its bed to die. 'Mecene' died--just like that--I left it in fine feather when I went to Florida in July, and when I came back in August it was brown and dry. It had one sucker, and that looks as though it may have survived. All the roses around it are fine.
Are these two cases of failure of a rootstock? Is anybody familiar with similar cases? I should add that destruction from something eating the roots is not a likely cause (it doesn't happen here, but I also checked), and both roses were in good to excellent shape in early summer. This is the first time I've seen anything like this.
Feedback is appreciated.