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Viburnam collapsed with spongy wood - seeking possible cause
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Jeff Layman wrote: If the Grevillea was killed by either Phytophthora or Verticillium then I made a hurried mistake replacing it with a Cotinus! I'll dig it up when it's dormant, wash off the soil, and put it in a pot for a couple of years. Not sure what I'll put in it's place; maybe a conifer. I wouldn't worry - it's had Verticillium for many years (probably over a decade), and the main effect has to be keep its growth down so that its shoots are only a couple of feet (rather than six!). And, assuming the pathogen was in the soil, it took thirty years for it to become infected. Cotinus are much tougher than Grevillia. Conifers are prone to fungal infection, too, and there's no way for an ordinary person to identify such pathogens precisely. Whatever you plant will be a risk. Regards, Nick Maclaren. |
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