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I have followed 'Diagnosis of ill-health in trees' by Strouts and Winters but didn't get a definitive answer...maybe you can help? Here's my data: Prunus Kanzan Back garden, grass around. Path 3m to W. Unaltered RZ Mature? 50-60yrs Has had pruning over the years, some for low branches and some for die back - not done during optimal summer time Good fertile soil on top of sand base 3ft down Symptoms Die back in upper crown (pic 1), spreading Late flowering on sparse areas in upper crown, small leaves Leaf discolouration (pic 2 - left leaf is normal) - Autumn effects? Seems localised to upper crown Cracks on lower stem to 1.8m (pic 3) Some bleeding Some frass at base of 1 larger (pic 5) Bulging and flattening on all lower stems Mallet suggests altered wood There is a stump of a removed Ash about 3m away that has prolific Kretschmeria/ Ustulina deusta and a large unidentified bracket fungus. Seat of damage - Roots or root collar, water conducting wood Suggested diagnosis' Silverleaf (pruning wounds, leaf discolouration - no fruiting bodies identified) Bacterial canker Cherry bark tortrix Internal decay from ...? Well that's about as much as i've got so far, if anyone has a thought on what it could be or something else to look for i would appreciate the help.
