Other rusts, leaf spots, sooty moulds

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Other rusts, leaf spots, sooty moulds

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Mike wrote:

5 Jun 2025

Discoloration is gum exudate dripping down and onto the ground.

Pinus radiata

MichaelMulvaney wrote:

5 Jun 2025

Thanks Ken - much appreciated

Pinus radiata

KenT wrote:

5 Jun 2025

I don't know what this is, Diplodia sapinea is not a rust it is in the family Botryosphaeriaceae (Ascomycota). Diplodia sapinea produces blue staining of the timber (under the bark), the image here appears to show superficial colouration on the bark surface that may or not be associated with a gum exudate. Examination under a microscope may show if there is a microorganism involved. There is a recent paper on Diplodia sapinea here: Wingfield, M.J., Slippers, B., Barnes, I. et al. The Pine Pathogen Diplodia sapinea: Expanding Frontiers. Curr. For. Rep. 11, 2 (2025). https://doi.org/10.1007/s40725-024-00236-2

Pinus radiata

MichaelMulvaney wrote:

5 Jun 2025

The only other ACT electronic records are two 1998 records from Pierces Creek

Pinus radiata

MichaelMulvaney wrote:

5 Jun 2025

This rust fungus seems well established in Australia so unsure whether this is one that ACT Forestry want to know about. @ACTBiosecurity

Pinus radiata

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Other rusts, leaf spots, sooty moulds

Other rusts, leaf spots, sooty moulds

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