Aod?

[Fanackerpan]

Hi, I have reported this to the forestry commission through their app but not heard anything back. All these oaks are down a footpath/ driveway in West Sussex. Each pic is a different tree. Any suggestions?

[treeseer]

Very common in US. See pic in attached. "Here at the

flare, the trunk broadens to form buttress roots. Are those

black droplets fresh paint or something? They look so

shiny. ”

“To realize that you do not understand, is a virtue,”

Ru noted, quoting the Tao Te Ching.

I nodded as I pulled a chisel out of my bag. “Those

black droplets are coming out of ‘bleeding lesions.’ It

looks like a soil-borne organism, such as Phytophthora sp.,

is colonizing the phloem tissues under the bark. These

lesions are seldom a structural concern, because the infection is in the phloem. This pest should be

managed with IPM treatments aimed at compartmentalization.

I flipped through pages 354–367 of my book on

diseases. “‘Remove soil from stem tissue, dry the area,

deeply aerate nearby soil, clean and heat the lesions, and

amend the soil with calcium fertilizer and beneficial

microorganisms to help speed compartmentalization.’

 

AOD is no cause for hysteria. It is most often associated with dirt on stems.

DD LLL 1406.pdf

Edited December 2, 2014 by treeseer

[Fanackerpan]

Thank you