Garden Pests and Diseases: What is Killing My Antique Rose? , 1 by gardensof333

gardensof333 wrote:
Hello all, new here. :)
I have two beautiful and vigorous (until last month) Blanca de Coulbert rose bushes. I noticed branches dieing off very quickly. There doesn't appear to be fungus or spot. Just very quick die off.

A few days earlier a landscaper came and so I am thinking this is herbicide damage but wanted your opinion. In case it was, I went out and flooded the roots a few times but every day I have dead branches. It even seems that within 24hours, a healthy branch is dead. This has been occurring for 4 weeks now.

Any suggestions as to what this is and how I can save them would be appreciated. they are 4 years old.