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Sudden oak death: updates
I'm back from a conference on sudden oak death. The most pertinent
information for the bonsai grower is that most states have standardized their quarantine procedures for plants coming out of California so they conform to the national guidelines. This is very good news, since each state having different rules was hard on California nurseries. For more regulatory information, go to: http://www.aphis.usda.gov/ppq/ispm/sod/ Otherwise, not much is new. A lot of work is being done on pesticide efficacy. There's a lot of concern because rose has been named a host plant (which explains what the "Jackson and Perkins" guy was doing at the meeting!). Europeans among you have a new disease to worry about: Phytophthora kernovii. It was discovered in England while people were looking for SOD, and it attacks beeches. It is more of a threat than SOD for England, which is why they are paving over Cornwall (! not much of an exaggeration!). No one knows where it came from and where else it might be, so check your beeches. For more information: http://www.defra.gov.uk/planth/pkernovii.htm A lot of us east coasters at the meeting were wondering what we ought to be doing to prepare for SOD being found established in the East, which will happen sooner or later. For now, all you guys should keep an eye on your Rhododendrons and Camellias. It is known that one case of SOD in PA was traced to a California bonsai nursery, so it could happen to you. Nina |
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