You did what I would have done.

Reasons: I see three potential symptoms of RRD/RRv:
the hyperthorniness when the other canes are nothing like
the fringe on the stipules at the bottom of one of the leaves is so overgrown compared to 'normal' leaves
the edges of new leaves are irregular and much wider toothed than the much smoother toothed edges of other leaves

Good eye for the things that were irregular in the worst way.

At the point that you are at now, I recommend the following additional step or steps:

"Apply a possible immune system booster. Until controlled scientific studies disprove these "possibilities", after cutting off the suspected cane, one could try boosting the immune system of the rose by either of the two methods below:

1) By applying hydrogen peroxide.

"In spite of the enormous information from research on genetics of plant disease resistance, the question still remains unresolved: what is directly inhibiting or killing pathogens and suppressing symptoms in resistant plants? This is particularly true for resistance to viral infections. Here we show that externally applied reactive oxygen species (ROS) such as hydrogen peroxide (H2O2) or ROS-producing (O 2�â [superoxide] and H2O2) chemical systems infiltrated into tobacco leaves 2 hours after inoculation suppress replication of Tobacco mosaicvirus (TMV) in the susceptible Samsun (nn) cultivar. This was determined by a biological and a real-time PCR method. Infiltration of leaves of the resistant Xanthi (NN) cultivar with the ROS-producing chemicals and H2O2 significantly suppressed local necrotic lesions (i.e. the hypersensitive response) after inoculation of tobacco leaves with TMV. Accordingly, an early accumulation or external application of ROS, such as O 2�â and H2O2, in tobacco may contribute to the development of resistance to TMV infection."

The above is taken from the following 2011 reviewed scientific published paper (there are other papers, this is just one example)

: http://www.akademiai.com/content/q055880253up3p57/

2) By applying aspirin.

"Salicylic acid (SA) is an inducer of systemic acquired resistance (SAR) and could be a potential candidate in the control of plant virus diseases............................................................................The results obtained confirm that SA promotes major changes in the induction of resistance in tomato plants and suggest that treatment with exogenous SA could be considered to reduce the infections caused by PVX."

The above is taken from the following 2014 reviewed scientific published paper (there are other papers, this is just one example)

http://link.springer.com/article/10.1007/s10658-013-0333-1

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Here is a link that might be useful: link for my web page

Thanks Ann and Henry! So Henry, what are the application rates for HP/Aspirin. Have you treated your roses with this?
Anyone else used this on suspected RRD?
Susan

I have not treated any RRV diseased roses with hydrogen peroxide nor with aspirin. This is because I have not had any confirmed cases of RRV. "From memory: early on I had a number of "RRV type" infections and I removed the whole plants. This was over several years. At some point I put the dots together. The "apparent" infections were either in the bed that was immediately downhill from the neighbor that had a lawn service or were very close to where I had used a herbicide on newly sprouted poison ivy (many places among my 1000 roses). I changed the bed next to the neighbors to a raised bed and stopped all herbicide use (except corn gluten meal). I have had zero cases since then."

The recommendations are based on results in the scientific literature for plants with other virus infections.

Examples for hydrogen peroxide:
http://forums2.gardenweb.com/forums/load/roses/msg0417381111236.html

http://forums2.gardenweb.com/forums/load/rosesant/msg0518594226728.html
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Example for aspirin:
http://forums2.gardenweb.com/forums/load/roses/msg1011110221766.html

See the following Google Scholar search for Aspirin:
http://scholar.google.com/scholar?hl=en&q=plant+virus+aspirin&btnG=&as_sdt=136&as_sdtp=

Here is a link that might be useful: link to Google Scholar search

This post was edited by henry_kuska on Wed, Sep 3, 14 at 10:34

I've tried both aspirin and hydrogen peroxide. Never saved a thing. Maybe I didn't apply it soon enough. I had a bad epidemic, so perhaps it would work on just a small bit at he very beginning.