Ganoderma resinaceum or Inonotus dryadeus

[Bundle 2]

ok in principles of tree hazard assessment and management - d lonsdale (FC) it say about g.pfeifferi (p105) and g.resinaceum (p106) have a varnish like resinous crust that melt when exposed to a flame. it also states g.res is less hard than g.pfei....cheers

 

[Giles Hill]

Here's one in it's early stages...

 

 

I wrongly identified it as Iononotus, thanks partly to the amber coloured droplet. It subsequently changed into a big load of Ganoderma brackets, like the ones in Steve's picture.

[stevelucocq]

arh yes thats how this one started off....jumped the gun whilst inspecting and ID it as Inonotus dryadeus and told my boss....the tree has three main areas of fruiting bodies (here below the most developed side) on the buttress and the tree (Q.cerris) is a good size (balanced crown with good foliage) and right by a busy path used by the public....keen to leave the tree as long as possible any ideas apart from reduction?...chemical treatments etc if any??......(yes, ideally everyone needs to see the tree in the flesh to carry out tests to give a good indication of the decay development, hazard etc) just interested to see what people think from what they have seen so far...cheers

[Log-ologist]

Its a Ganoderma , just look at the brown dust on that.

[Amelanchier]

arh yes thats how this one started off....jumped the gun whilst inspecting and ID it as Inonotus dryadeus and told my boss....the tree has three main areas of fruiting bodies (here below the most developed side) on the buttress and the tree (Q.cerris) is a good size (balanced crown with good foliage) and right by a busy path used by the public....keen to leave the tree as long as possible any ideas apart from reduction?...chemical treatments etc if any??......(yes, ideally everyone needs to see the tree in the flesh to carry out tests to give a good indication of the decay development, hazard etc) just interested to see what people think from what they have seen so far...cheers

 

Well, you've competed the first part of the VTA process. You suspect a defect (decay) because of symptoms (fruiting bodies).

 

So, onto the second and third parts:-

 

2. If a defect is suspected on the basis of symptoms, its presence or absence must be confirmed by a thorough examination.

 

3. If the defect is confirmed and appears to be a cause for concern, it must be measured and the strength of the remaining part of the tree evaluated.

 

I'd suggest some means of decay detection equipment. Resistograph? PICUS? Even a increment borer if you're feeling sadistic.

 

That way you can complete parts two and three at the same time. Remember its not the extent of the decay thats important, its how strong the remaining parts of the tree are.

 

The findings will determine if any works are necessary.

[stevelucocq]

cheers for info on VTA....I have currently started my AA Tech Cert so this is a good help....we have different equipment in work,resistograph etc so will ask about taking measurements of the remaining good wood...I understand that trees can remain up to 70 percent loss (if hollow right?...i take it the reading of such resistograph test can be pretty subjective) but measuring the extent of the root decay must be difficult by exposing what large surface roots that are available….sorry if I am asking to many questions and may be I should really wait and read up more when my course covers this topic but I am keen to learn more….anyway thanks

[Bundle 2]

OK, so what do we know about Ganoderma spp.....

It can take its sweet time gettin' established in the host. The appearance of the fruit bodies can be indicative of one thing for sure...that it is feeding on something and its not a toffee crisp!

The info on decay characteristics will say that the parasitic infection modifies wood in the lower stem, buttress roots and lower scaffold branches ( ime )

It might be possible to assess the damage as it affects the roots by way of a nylon hammer. Two things are likely possible here......The roots tend to dieback on the undersides as a matter of course in healthy trees but these tests may inform you as to the need to get it picus tested .Importantly maybe, if you are out of your depth you should refer the case to a another arborist...ok, that said.

The roots may well vibrate thru the ground as you strike them. This is indicative of decay .

There are formulae that can be referred to as a guideline to work to.....It correlates the dbh with root strength

 

Tree Root Failure Thresholds

<1/3 Buttress roots lost within DBH x 3

Residual upper wall thickness on buttress

roots greater than 0.15 x DBH, in two thirds of

buttress roots (Fraedrich & Smiley –Smiley & Coder 2001)

 

When these numbers are there, alarm bells should be goin' off my friend!!

 

There are indeed formulae for residual wall thickness for stems also.....something like....

A tree needs 1" or more for every 6 " of stem dia'

Increase these to 1.5" for a stem with horseshoe shape ( opening =20% )

2" for opening 30%

 

It is not my intention to get you either condemn or condone any tree and as far as it goes, I take no responsibility for any decision you may make from these comments....

[stevelucocq]

OK, so what do we know about Ganoderma spp.....

It can take its sweet time gettin' established in the host. The appearance of the fruit bodies can be indicative of one thing for sure...that it is feeding on something and its not a toffee crisp!

The info on decay characteristics will say that the parasitic infection modifies wood in the lower stem, buttress roots and lower scaffold branches ( ime )

It might be possible to assess the damage as it affects the roots by way of a nylon hammer. Two things are likely possible here......The roots tend to dieback on the undersides as a matter of course in healthy trees but these tests may inform you as to the need to get it picus tested .Importantly maybe, if you are out of your depth you should refer the case to a another arborist...ok, that said.

The roots may well vibrate thru the ground as you strike them. This is indicative of decay .

There are formulae that can be referred to as a guideline to work to.....It correlates the dbh with root strength

 

Tree Root Failure Thresholds

<1/3 Buttress roots lost within DBH x 3

Residual upper wall thickness on buttress

roots greater than 0.15 x DBH, in two thirds of

buttress roots (Fraedrich & Smiley –Smiley & Coder 2001)

 

When these numbers are there, alarm bells should be goin' off my friend!!

 

There are indeed formulae for residual wall thickness for stems also.....something like....

A tree needs 1" or more for every 6 " of stem dia'

Increase these to 1.5" for a stem with horseshoe shape ( opening =20% )

2" for opening 30%

 

It is not my intention to get you either condemn or condone any tree and as far as it goes, I take no responsibility for any decision you may make from these comments....

 

 

Thanks for data will look further into it....cheers steve

[John Shutler]

i heard a brilliant fact about the amount of spores released by 1 sqcm of ganoderma every 1 hour, think it was in the region of 2 million...tony correct me if im wrong

[Bundle 2]

I was called out to look at this about a week ago...

Quercus ilex which has failed.....

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0160.jpg

 

And this view from the other side....

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0163.jpg

 

I decided it was Ganoderma adspersum based on the physiological characteristics of the fuiting body.

 

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0175.jpg

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0157.jpg

 

Typical of this fungus, the basal wood was infected by the parasitic fungus which has modified the wood with some dramatic results....I guess the fungus is not bothered whether the tree is standing or not!!

Ganoderma adspersum, causes a soft white rot.

 

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0158.jpg

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0162.jpg

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0164.jpg

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0167.jpg

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0164.jpg

 

The soft white rot causes ductile fracture or windthrow after root fracture...which is what happened here.

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0159.jpg

This one shows the root mat that appears between the stems at the compression fork, the point of failure...

http://i480.photobucket.com/albums/rr170/Bundle2/DSCF0176.jpg

Cool eh....needless to say the chickens are not too happy about it!<<<