Pines with Stem Exudates

[Chris at eden]

Hi Folks

 

Anyone seen this before?  Its a site I looked at in Oxford a few days ago.  The foliage is yellowing from the ground up which when I had it described to me I thought Red Band Needle Blight but that doesn't explain the stem bleeding so thought maybe something secondary.  When you look closely though they are bleeding from canker like openings which would point to Pine Pitch Canker but according to the FC this is not yet present in the UK.  Any thoughts? 

 

Cheers

     

[David Humphries]

Did you consider Armillaria?

 

any presence or lack of rhizomorphs aound the root collar?

 

 

 

 

 

[Chris at eden]

16 hours ago, David Humphries said:

Did you consider Armillaria?

 

any presence or lack of rhizomorphs aound the root collar?

 

 

 

 

 

Thanks David.  That is what I was thinking when I said secondary, have you seen bleeding to this extent when Honey Fungus was present?  Didn't see any bootlaces but access to most of the trees was restricted by dense shrubberies. 

[David Humphries]

On 2/6/2018 at 10:33, Chris at eden said:

Thanks David.  That is what I was thinking when I said secondary, have you seen bleeding to this extent when Honey Fungus was present?  Didn't see any bootlaces but access to most of the trees was restricted by dense shrubberies. 

I've personally only seen Armillaria sp associated with pine once and that did have stem bleeds/exudation and rhizomorphs.

I didn't get a positive micro Id on the fruit bodies at the time, but suspect that it was A. ostoyea (rather than A. mellea) due to its macro features and it being more often associated with coniferous species.

 

There are many records of Armillaria sp on pine within the FRDBI pages, but I get the impression that cedar, cypress & wellingtonia are more susceptible to colonisation than pine.

 

 

Probably worth having a good root around the bases of the trees if you get a chance to return to them.

.

 

 

 

[Chris at eden]

Thanks David