Crown gall on the roots of roses grown in pots
rosefolly
10 years ago
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porkpal zone 9 Tx
10 years agonikthegreek
10 years agoRelated Discussions
Do I 'disinfect' SOIL that had rose w/crown gall?
Comments (9)From Google: Unlike black spot and powdery mildew, crown gall (Agrobacterium tumefaciens) is a soilborne bacterial disease which infects root and/or stem tissue rather than leaves. Galls are most frequently seen as round, rough-surfaced growths near the plant's crown or on roots. These "crown" galls will eventually girdle the plant, resulting in poor growth and eventual plant death. Crown gall is a difficult disease to control once a plant is infected. It is best to remove diseased plants as soon as they are detected. Where possible, remove and discard all soil in which the root system is growing and replace with sterilized soil. If crown gall is a recurring problem in an area of your yard, it is best to rotate the area with a nonsusceptible grass crop for 3 or 4 years. Where a gall is restricted to stem tissue only, cut off the entire cane and immediately seal the cut surface with glue. Always sterilize cutting tools with rubbing alcohol after each cut of a cane with crown gall. During and after planting, take special care to avoid any and all wounds, especially near the soil line. Provide good winter protection to prevent bark cracking or other cold injury to bud union area. Never use crown gall-infested soil to mound over bud union for winter protection....See MoreReplant where a rose got crown gall?
Comments (13)Melissa, I've successfully stopped crown gall on my roses that have become infected with it by carefully digging up the bush then removing the gall(s) and a thin sliver of wood at the point where it was attached. Because it's a bacteria, I spread some cheap generic antibacterial ointment on the wound. I then mix two cups of bleach in a five gallon (19 liters) bucket of water, and pour this over the soil in the hole from which I removed the bush. After the bleach water drains from the hole, I replant the bush from which the gall was removed. I've never lost a crown gall infected bush when I followed this procedure. After replanting. treat as you would any transplanted rose bush....See More/rose-crown-gall-becoming-more-prevalent-in-florida/
Comments (7)I interpret that you may be asking if there is a low level of bacteria from a gall infection still present in the rose when it appears to be cured. (Old rosarian has covered the insect type of gall formation.) I cannot give you a specific answer for the specific type of gall that infects roses (Rhizobium radiobacter), but in general plants can control low levels of bacterial infection with their immune system. " In most cases, plants infected with a bacterial pathogen cannot be cured. Even when symptoms are not present, bacteria still persist in the plant at low levels and symptoms are likely to reappear when conditions are favourable." https://www.ngia.com.au/Attachment?Action=Download&Attachment_id=1843 The following general article describes the biology involved in an infection: http://www.apsnet.org/edcenter/intropp/lessons/prokaryotes/pages/crowngall.aspx...See MoreDisease concern with The Fairy
Comments (8)There was a suggestion to "keep it". No documentation was given. What I have seen for roses planted in the ground is to eliminate the plant and sterilize the soil. Example of recent article: https://agrilifeextension.tamu.edu/library/landscaping/crown-gall-of-roses/ The following quote is from a discussion of galls in potted roses: "In my area, anything too closely related to Ballerina or The Fairy is pretty much guaranteed to gall and fairly quickly die from it." https://www.houzz.com/discussions/1565032/crown-gall-on-the-roots-of-roses-grown-in-pots...See Morerosefolly
10 years agonikthegreek
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10 years agoanntn6b
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