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Showing results for tags 'canker'.
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A population of Aspen (Populus tremula) on one of our nature reserves has rapidly succumbed to disease this year and I am struggling to identify the cause. I submitted a report via tree alert earlier in the year, but I didn’t receive a response as I suppose the team are snowed under with reports of ash dieback and other economically important diseases. The Aspen have cankers on the small branches and twigs. Searching through the internet, the closest match I can find for the disease is Black Canker (Ceratocystis fimbriata). However, I cannot find any reports of the disease in the UK and I wonder if anyone could suggest a more likely cause? Thanks in advance for any help you can offer!
Hello, I'm hoping an expert eye can tell what is wrong with my apple tree? I'm worried that it is the start of canker. It is a Spartan apple tree on M26 rootstock planted in November 2015 as a 2-year old bare root plant. On three of the branches, the bark appears to have split and looks papery. Is this the first sign of canker? There is also an area that looks more like pictures I've seen of canker, where the branch has a depression. Please can anyone identify the problem and suggest advice? I've already pruned out some of the affected branches. Hopefully, I'm just being paranoid and there's nothing wrong! It's been quite wet here (Northants), so is it possible the the bark has split due to rapid growth? Many thanks.
Hi All, I have found a reddish/brown exudate on a mature lime tree. It seems resemblant of pseudomonas p syringae on horse chestnut but I have not heard of it on lime before. It is really bright red, and doesn't have the strong smell typical of the horse chestnut variety. It is also not typical of the bacterial wetwood exudates which look quite frothy, and can be seen on lime sometimes. Is there any sort of canker that affects limes? Any ideas anyone? Thanks Leonie