|
| If a plant has crown gall, is the entire plant infected? Will a cutting taken from a galled plant that manages to root produce a new plant that will quickly (or eventually) develop crown gall? (Let's assume that the rooted cutting has "clean" soil to grow in.) |
Follow-Up Postings:
|
| From what I've observed, yes, the plant is infected and others propagated from it will express the gall when given the chance. Some varieties are much more susceptible to gall infection than others. Ralph Moore's Red Germain was highly susceptible. Francine Austin will spread it around the garden everywhere it roots or layers itself. The Fairy, Lady Carolina and Flower Carpet are also quite susceptible in these parts. Kim |
|
| There can be "aerial" crown gall, meaning up on the canes, where the bacteria have been spread by pruning cuts, often a number of galls on a single plant. Traditional advice says that, if you cut well below the galls and disinfect with a bactericide, the plant can be saved. This implies clearly that the infection is not systemic but localized. I can't vouch for that, as I've never had a gall that I judged treatable. Note that there will be loose bacteria in the vicinity of a gall that are waiting for the opportunity of a wound. |
|
| Thanks guys! I appreciate your thoughts on that. 'Flower Carpet', yes that seems to be highly vulnerable. I see galled examples everywhere here. |
|
| I wouldn't bother to try to treat a plant with gall. I'd just "treat" it with a shovel. One can argue from now 'til the cows come home about whether RMV spreads in a garden (or how many angels can dance on the point of a pin) -- but it is KNOWN that gall will be spread, so why even try??? Jeri |
|
| of course jeri, but what about if it is rare/out-of-commerce? |
|
| Then pull a Roses of Yesterday and Today and treat it with Galltrol. According to what I was told years ago when visiting there, they treated every plant they sold with the stuff as they had gall all over the property. Kim |
Here is a link that might be useful: Galltrol
|
| But there you are, Kim -- Over the years, I have received FOUR plants with gall. One was a potted Austin rose, bought from Sassafrass at a ridiculous price (remember Sassafrass?). The other THREE galled plants all came from Heirloom. None of them actually got roots into the ground, fortunately, but it's possible I may have spread it, pruning. So, treating things with gall and then selling plants from their infected mother stock doesn't seem to work well, IMHO. So, unless it was the ONLY one in the world, I'd STILL dump it. Because it is a FAR worse thing to have in the garden than RMV. We found a remarkably beautiful Maman (or White Maman) Cochet in the Sierra Foothills. Did not collect from it, because it was so badly galled. And that plant is gone, now. Jeri |
|
| Do you remember the amazing Gloire de Dijon pictured in the early Ashdown catalogs? It grew at an acquaintance's house in Hancock Park and covered the two story rear facade. It died from gall. It was many decades old and had been an amazing plant until one year it broke out in growths all over the thing and collapsed. That plant was the source of their stock of GdD. Sandy Gall lost her Leontine Gervais which was pictured in the Arena catalog several times to gall. The wooden fence and arch where the Cl. Maman Cochet now grows (the one I supplied her with from Limberlost when I first learned to push rose through disbudding) is where the LG died. She removed the soil, soaked the hole with a weak bleach solution for several weeks, replaced the soil and planted. I've not heard of any issues with the plant, so I presume it worked. Kim |
|
- Posted by henry_kuska z5 OH (kuska@neo.rr.com) on Mon, Apr 9, 12 at 17:26
| Title: "Cationic Surfactants: Potential Surface Disinfectants to Manage Agrobacterium tumefaciens Biovar 1 Contamination of Grafting Tools" See link below. |
Here is a link that might be useful: link for above
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in. If you aren't yet a member, join now!
Return to the Antique Roses Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.