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Oak Root Fungus (Armillaria)
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Posted by sesselsfca z10 San Fran.CA (My Page) on Sun, Jan 8, 06 at 13:30
| The soil in my San Francisco garden is badly infested with Oak Root Fungus (Armillaria mellea), which has recently been killing off a number of my older plants, including Japanese Maples, crabapples, and several species fuchsias. Does anyone know whether perennial species impatiens are resistant to this disease? I have been growing I. stuhlmanii, mengtzeana, cicilia, niamniamensis and arguta (among others) in the ground. So far, they have shown none of the typical signs of being infected, but I am wondering whether I should take cuttings and grow them on in containers, just to "hedge my bets." Any information on the subject would be greatly appreciated.
Sorry about the spelling of the species names. |
Follow-Up Postings:
RE: Oak Root Fungus (Armillaria)
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| I would say that would be a safe thing to do. I am not sure if the Oak Root Fungus will affect them but its always better safe then sorry. I would be interesting to hear back as to their progress. |
RE: Oak Root Fungus (Armillaria)
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| OK; thanks for the response, Derrick. I will give you a report when I know anything (which should be sometime in the spring). |
RE: Oak Root Fungus (Armillaria)
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| I've been doing quite a bit of research on Armillaria. Check below the surface level at the base of the trunk. If you find some white mycelial growth that looks like white webbing in the bark, that's a sign of Arm. Also mushrooms at the base can be an indicator. I'm currently searching for trees less susceptible to it. We removed a Kaffir Plum tree in a large raised planter today. All infected roots of the tree need removing as well as other sick plants surrounding it. We may need to even remove all the soil. Hopefully find the right tree and plant within plastic or something |
Trees less susceptible to Armillaria
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| Anyone know of trees less susceptible to Armillaria????? |
RE: Oak Root Fungus (Armillaria)
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| For what it's worth, I was sent a leaflet some time ago entitled "Resistance or Susceptibility of Certain Plants to Armillaria Root Rot, which lists a great many species tested by the University of California for resistance in Northern California conditions. The author is Dr. Robert D. Raabe, and it was published as "Leaflet 2591" by the Division of Agricultural Sciences, University of California, Revised August 1979. I'm not sure how one could go about getting a copy today, given the date, but you might try a Google search on the author's name, or contacting the University directly. |
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