Keizer's Fungi Q & A.

[Fungus]

1) The black liquid ooze from phytoptheras and cankers, what is it actually made up of?

2) Can birds such as woodpeckers act as vectors for pathogens?

 

1. Depending on the pathogen ivolved, it can either be (acid) fluid from the cambium (Armillaria : rhizomorphs), or cambium fluid slightly changed by Phytophthora or bacteria/micro-organisms causing AOD.

For the assessment of Armillaria, go by the acid smell of the fluid and for Phytophthora (see photo), there is a test kit available.

2. Yes, they can.

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[Fungus]

What do you make of these images ... an Oak obviously robur, I suspected laetiporus on early stages due to the white mycelium in the rays?

 

Tony,

To early a stage to determine what causes the infection. How close to ground level was the cut ? Depending on this, it could either be L. sulphureus, or f.i. a Ganoderma (australe/resinaceum).

[Tony Croft aka hamadryad]

Tony,

To early a stage to determine what causes the infection. How close to ground level was the cut ? Depending on this, it could either be L. sulphureus, or f.i. a Ganoderma (australe/resinaceum).

 

ground level cut with mycelial growth, we must suspect laeti due to ray penetration, wood colour and cracking?

[Fungus]

ground level cut with mycelial growth, we must suspect laeti due to ray penetration, wood colour and cracking?

 

[Matthew Arnold]

Not a particularly clear picture but found on a oak deadwood stub. We removed the worst of the branch as it was overhanging a footpath. The stub is about 3 foot long and the fungi appeared a couple of weeks back. Any ideas?

[Tony Croft aka hamadryad]

no chance on that photo best guess daedalea quercina,

[Fungus]

best guess daedalea quercina,

 

I agree, because of the shape of the initial brackets looking like (partially) sterile lumps and the place of attachment of the brackets underneath, i.e. in the armpit of a branch, which appears to be brown rotted.

[ILikeScotsPine]

1. Depending on the pathogen ivolved, it can either be (acid) fluid from the cambium (Armillaria : rhizomorphs), or cambium fluid slightly changed by Phytophthora or bacteria/micro-organisms causing AOD.

For the assessment of Armillaria, go by the acid smell of the fluid and for Phytophthora (see photo), there is a test kit available.

2. Yes, they can.

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Thanks, much appreciated

[sloth]

Hello keizer, I wonder if you could clarify for me the sequence of name changes of the Ganoderma's? And if possible why they changed, and what the names mean; it helps me remember! Many thanks

[Fungus]

Hello keizer, I wonder if you could clarify for me the sequence of name changes of the Ganoderma's? And if possible why they changed, and what the names mean

 

The only two recent name changes are Ganoderma lipsiense, was G. applanatum (applanatum = flattened) and G. australe (australe = from the south), was G. adspersum (adspersum = scattered). And the reason for changing a species name always is, that the "new" name was given to the species long before the "older" and because of that no longer valid species name.