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possible Phytophthora ramorum in Viburnum tinus
Hi
I bought a large (4ft) container-grown Viburnum tinus from a supplier in Leicestershire in late February. It seemed fairly healthy when it arrived apart from some small black-spot lesions on the older growth. It has been planted in semi-shade with sun all morning and again in the later afternoon and evening and is sheltered from the prevalent south-westerly winds. Although we are costal north Cumbria we get very little wind coming from the north to carry any potential salt spray. The Viburnum was planted in a well-prepared hole with FYM and blood, fish and bone. It has been regularly watered and this spring it has been liquid fed on several occasions since planting as it has started to look poorly. Since planting we have had frost on one or two nights and even then only mild frost. Over the last month or so, last year's growth has become yellowish and the black/grey leaf lesions have spread. Some in-bud flower heads have turned brown and dropped - others are now starting to open and look quite healthy. There is a reasonable amount of leaf and bud drop but I can't see any characteristic stem lesions as yet. I have contacted the nursery this morning as I was suspicious of Phytophthora ramorum infection. Interestingly he said they had just had another shipment of Viburnum tinus in from Italy (where I know it has been recorded) and he is investigating this recent shipment for suspected Phytophthora ramorum infection. I have just emailed some photos to the nursery and will send them some samples. I have also saved some samples in the fridge in case I need to send to defra. Maybe I'm just being a little neurotic but I have posted some images on my website and I would be interested in comments, especially from people with experience of this disease. Many thanks Liz Images can be found at: http://www.libtib.org.uk/viburnum/viburnum3.jpg http://www.libtib.org.uk/viburnum/viburnum4.jpg http://www.libtib.org.uk/viburnum/viburnum5.jpg http://www.libtib.org.uk/viburnum/viburnum6.jpg http://www.libtib.org.uk/viburnum/viburnum7.jpg -- Posted via a free Usenet account from http://www.teranews.com |
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