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02-11-2008, 03:12 PM
|  | Wild Member | | Join Date: Mar 2008 Location: Stone Staffordshire
Posts: 186
| | | spotty Sycamores
Nearly all the sycamores in my area have developed black spots on the leaves towards late summer, is this common everywhere or are they diseased?
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Peril to the detective who says "it is so small it does not matter"everything matters-Hurcule Poirot |
02-11-2008, 03:33 PM
| | Commander of the Wild Empire | | Join Date: Jan 2006 Location: London
Posts: 3,607
| | | Re: spotty Sycamores
It is most likely Tar-spot, caused by the fungus Rhytisma acerinum. It is generally very common. |
02-11-2008, 03:41 PM
| | Wild Member | | Join Date: Mar 2008 Location: Stone Staffordshire
Posts: 186
| | | Re: spotty Sycamores
Quote:
Originally Posted by Tiggrx  It is most likely Tar-spot, caused by the fungus Rhytisma acerinum. It is generally very common. | So it wont effect the trees apart from the spots or will it?
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Peril to the detective who says "it is so small it does not matter"everything matters-Hurcule Poirot |
02-11-2008, 03:47 PM
|  | Commander of the Wild Empire | | Join Date: Aug 2008 Location: Preston in NW
Posts: 3,698
| | | Re: spotty Sycamores
its actually a sign of clean air. the spots don't do anything to the tree |
02-11-2008, 03:57 PM
|  | Commander of the Wild Empire | | Join Date: Dec 2006 Location: On the southern boundary of the Lake District National Park.
Posts: 4,585
| | | Re: spotty Sycamores
No, it won't affect the trees so don't worry. Tiggrx is right with his diagnosis and to take it one step further, R. acerinum has been split into biological races adapted to different maple species. The fungus found on Sycamore is probably R. pseudoplatani. R. punctatum has been recorded on Sycamore but is less common. Just call it Tar spot!
Infection takes place when the leaves are young and the external symptoms take a long time to appear.
It's common everywhere, apart from Skye and areas where there is heavy industrial pollution. | | |
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