My friend has. 2 roses with galls on the new growth. The galls are solid. Should she dig out the roses. Not much info available on galls. & what to do. It is a big infestation and nearly all the stems have it.

Here's one cut open

I have no idea, but that looks really terrible.

I also have never seen such a thing! It is, however, odd that such large growths are not having a very noticeable effect on the health of he plant...

I have never had galls on my roses, I do get leaf gall on my Azaleas, The treatment for most leaf and stem galls appear to be to do nothing or just remove the galls. For crown gall, which would be down near the base of the plant it appears the best thing to do is to immediately remove the plant and the soil with all the roots. It seems in most cases leaf and stem galls do very little damage to plants(in general).
I did find this article with some info on rose galls, about two thirds of the way though the article.
http://www.extension.umn.edu/g...

Seedfork is right. Stem galls do not infect the whole plant and just removing them is sufficient. However, crown gall is a serious problem. Crown gall is caused by a bacteria in the soil. If a rose has crown gall, the whole plant is infected and the soil where the rose was sited is also infected so another rose should not be planted in that spot. Nor should any cuttings from the rose be taken for future propagation.

Baldo Villegas is an entomologist who was a professor at UC Davis and was a total rose nut. In his professional capacity he traveled all over and was often consulted by various agricultural departments. His love of roses drove him to study the diseases of roses, too.

Here is a link about crown gall on his site ... which I think anyone who grows roses should bookmark because it gives you a good starting point to find out what's happening with your roses.

http://sactorose.tripod.com/ip...

I know he is working with the people who run the Sacramento Cemetery Historical Rose Garden because of crown gall problems they have found in the garden. There may be an article on their site. (I didn't take the time to do the research.)

I hope this helps.

Smiles,
Lyn

Joannabanana said:My friend has. 2 roses with galls on the new growth. The galls are solid. Should she dig out the roses. Not much info available on galls. & what to do. It is a big infestation and nearly all the stems have it.

I have this gall on my shrub roses and have tried to get rid of it for years by cutting them off. The stems that it grows on will get distorted and eventually die even if you cut the galls off. We had a rose specialist who is a trial grower for new roses for our district Horticulture meeting and I asked her about it. She said if they continue for more then a year you might as well dig up the plant and discard it as it will never be nice again. My William Baffin got dug this week and discarded and my other three shrub roses are in the works to get dug up as soon as I get time.
Mine were planted at different times, quite a ways apart in my garden but the insect that causes them finds them wherever they are, so I'm guessing if that insect is in your area, you might have a hard time growing shrub roses.

Susie ....

Thank you for the information. I get stem galls caused by gall wasps in my garden, but I have never had galls at the base of my plant. Guess that insect is not active here. Oh, I have plenty of others I can share ...

It makes sense that a gall located at the base of a cane would impair the vigor of the plant because it breaks the flow of sap from the roots up the cane.

Thanks again.

Smiles,
Lyn

I think this is not a gall caused by a wasp...I've seen them ant the galls are much smaller and turn reddish..more hairy looking. I think this is a stem gall caused by a bacteria or something else. The problem roses are in Edmonton and my roses are in Calgary. I have not had these galls on my roses so I wasn't sure what to advise. She is going to take the roses out. the concern is that it may spread to some of her ornamental trees & shrubs. Looks like the roses are only affected

We have galls like that on the rugosa roses here in tower MN. I've been pruning them off and they keep coming back and the plants are slowly dieing. I cut one open and found a tiny worm or larva of some sort in it. I'm thinking it might be wasps but still haven't figured out how to get rid of them.

ElizabethAnn ...

Galls are common on rugosa roses and generally do not impact the plant significantly. It is crown gall that is the major problem for roses.

Since I do have galls caused by wasps in my garden, I can share that I just cut them out and the roses just keep on going. Since I don't spray, I don't even know if you can do anything about them. None of the roses in my garden that have had galls caused by wasps even slowed down a bit.

However, if your plants are slowly dieing, you might want to check and see if you have galls on the roots. That is crown gall and the rose should be removed.