Trees with disease

[Richard 1234]

Anyone know what this is please

Many thanks Richard

[Lucan]

Look like tar spots, nothing to be worried about

[David Humphries]

  Lucan said:

Look like tar spots, nothing to be worried about

 

I'd agree with this.

 

If you're on the main forum and not looking via mobile, have a look at the gallery images and info from the below link.....

 

Rhytisma acerinum - Sycamore Tar spot - David Humphries’s Fungi Directory - Arbtalk.co.uk | Discussion Forum for Arborists

 

 

 

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[Paul Cleaver]

Tar spot on Sycamore = unpolluted air

[Richard 1234]

Many thanks for taking the time to reply I will look at the link later as mobile signal is poor here everything takes ages to load up!

It looks as if it is killing them its on the small trees little sapling that have just grown themselves from dropped seeds.

[Paul Cleaver]

  Richard 1234 said:

Many thanks for taking the time to reply I will look at the link later as mobile signal is poor here everything takes ages to load up!

It looks as if it is killing them its on the small trees little sapling that have just grown themselves from dropped seeds.

 

yes its a bad infestation on those seedlings - photosynthesis issue

[Cae Ffynnon]

Out of interest, I have a Sycamore that is effected by the same disease.

What actually causes the spots to form?

Does it indicate other problems are likely to be developing?

 

I can confirm the lack of air pollution, we have lichen growing every where up here, even in the middle of the public road....

 

Chris

[David Humphries]

  Cae Ffynnon said:

Out of interest, I have a Sycamore that is effected by the same disease.

What actually causes the spots to form?

Does it indicate other problems are likely to be developing?

 

I can confirm the lack of air pollution, we have lichen growing every where up here, even in the middle of the public road....

 

Chris

 

Fungal spore that over winter on the fallen leaves, which then drift to new host.

 

I don't think it necessarily requires a stressed host to latch on to.

 

 

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[Cae Ffynnon]

Thank you David,

 

The spores most likely being killed off by a pollutant, sulphur dioxide.

 

Preseumably these spores are also present in the soil, as the winds around here mean we never see the fallen leaves...

 

Chris

 

Always taking the oppurtunity to learn.

[Richard 1234]

Thanks for the replies!

I will get some other pictures as they were the better looking examples of the black spots some are far worse!!