https://medium.com/wehearthealthliteracy/sign-vs-symptom-its-in-the-eye-of-the-beholder-c03e09eaadc2

Pv Picotee,

It does not look like classic black spot or chlorosis to me. Rose Mosaic Virus can look like that leaflet, though. However, I am not saying that it is. As Kristine wrote above, it could just be some weird, unexplainable, and transient condition.

Just watch for the same yellowing pattern reappearing elsewhere on the bush at this time or at any time in the future. If it recurs it may indeed be that the bush is infected with Rose Mosaic Virus, of which there is no cure easily available to home gardeners. Virus infected bushes can grow normally, but they also can decline. The virus is systemic, infecting all parts of the rose bush. It is a wait and see situation as I see it.

If it proves to be infected most folks evict such roses from their gardens. They are dug up roots and all, then everything removed is placed in the household trash, not composted, or tossed over the fence to rot in the woods back there.

RMV does not transmit through cutting tools, or by aphids, mites, or such like sucking vectors. Virus infected root stocks of grafted roses transmit the virus to the whole bush. Virus infected scion growth, the top growth on a grafted rose bush, transmits the virus to the rootstock. The whole bush is virused.

Own root roses propagated from virused cuttings are virused also, the entire new bush.

There has come to light recently, the possibility that the virus can be transmitted through rose blossom pollen from virused rose bushes carried to non-virused rose bushes by pollinators like bees, thereby infecting them through the diseased pollen fertilizing the previously disease free bush's flower! The virus then moves through the rose's circulatory system to all parts of the bush. This is not yet confirmed positively. I hope it is proven incorrect!

Moses

Wow- and oh brother. If it ain't one thing it's another with these wonderful, beautiful plants. I have indeed removed about 3 other leaves that had the same look. It's been in the ground for about a month and has looked quite healthy until these few leaves looking suspicious. I am hoping that it won't be sent into decline, as you mention that they can survive and grow in spite of virus. This morning I also noticed 2 new shoots -- hopefully that's a sign of good things to come. Really appreciate your input - always helps! PNW -thanks for your encouragement. I am going to try no worry approach and wait and see. I'll post as time goes by. Thanks to all!

I second Moses and Kristine! I had about a half dozen leaves looked like that on the bottom of an ADR climber rose. They fell off and I haven't seen anything similar since and its been a couple of weeks.

Hope so! Actually saw 6 new shoots upon a relook. Thanks. What is an ADR?

Pv Picotee,

Allgemeine Deutsche Rosenneuheitenprufung (ADR), is a German rose trial. There are ten test gardens throughout Germany, where new roses are intensely tested for three year terms. They are tested mostly for disease resistance and winter hardiness under a variety of GERMAN growing conditions, hence 10 gardens in differing locales are used to get a broader picture of a rose's attributes.

Those roses that pass the trial garden tests are awarded the coveted ADR designation. A rose can lose its ADR award if it later proves to have been given the award prematurely, and later on begins to show its true nature of disease and winter hardiness issues that it did not show during its 3 yr. trial, and do not now meet the judges minimum requirements.

Although the very varying growing zones and environmental conditions we experience in the USA may cause an ADR award to be irrelevant. However, many of us who have similar zones (usually USA zones 6 an 7) to the zones of the test gardens in Gemany where the roses are put through their trials, find an ADR awarded rose a good indication that it will perform very well in our gardens regarding disease resistances and winter hardiness.

Moses

Oh I like the sound of that. ...and they are sold in US? As in Rhode Island? Guess I'll give it a google....Thanks again for such good info.

Follow up to yellow leaves - aug 30 - I have taken about a total of 6-8 yellow leaves off of rose. Haven't seen any new ones for a few days - a week maybe. I also have 6 small rose buds developing. The plant is super healthy looking so maybe it was just a yellow leaf thing but nothing too serious. Hope that's the case! Thanks to all.

Pv Picotee,

Sorry for the late response to your question about the availability of ADR winners in Rhode Island. Indeed, yes they are! It seems the German rose breeding firm, Kordes, has more ADR wins than any other rose breeder.

Lowe's and Home Depot often have the more common ones, strangely enough, but very reliable mail order growers carry the ADR winners that are less well known.

My short list of ADR winners are:

Zaide,

Summer Romance

First Crush

Madame Anisette

Dee-Lish

Pink Enchantment

Earth Angel

Cream Veranda

Quick Silver

Frances Meilland

Karl Ploberger

Dark Desire

Amaretto

and there are many more, mostly roses bred within the last 20 years, very new roses.

Moses

Whats your general location Pv Picotte? Thanks...

Remember that sometimes toward the end of the growing season leaves can start looking a bit funky....

southern Rhode Island

If these leaves persist, check the undersides. If you see yellow-orange growth on the undersides of the leaves under the yellow growth on the top, and if the discolored leaves are at the base of your rose bushes, you may want to check if your roses has "rust".

Rust won't go away and needs agressive treatment to keep it from spreading throughout a garden.

Thanks for that. I do not see such colors on the undersides. I'll keep checking though. Haven't seen any more yellow leaves for a bit. Hope it's gone!