Spotted| Spotty Gum| Dieback| Disease| Brisbane - research

Eric Frei · 16th June 2011, 07:33 PM

For some time now I have observed a strange dieback of spotty gums (Corymbia citriodora and maculata).

At first I thought it was drought related but we have had good rain now since December 2007.

On a site today all spotted gums were affected in varying degrees. Some were pretty much dead whilst others had the signs of the pathogen and of course some were in between. Even saplings were diseased and dead/dying.

The trees on this site were planted in 1996 so it rules out construction damage. The trees are in garden beds with other trees that are doing fine so it is species specific. Two garden beds are separated by a 10m wide concrete driveway built well for large trucks so I rule out disease transmission by root grafting. Other species nearby include wattles which are healthy.

There was no basal wounds, no signs of tampering or places for a pathogen to enter. No fruiting bodies at ground level.

I think the disease is definitely a fungal pathogen in the vascular system. So is it the xylem or phloem that is blocked? Or both perhaps?

Symptoms are:-

Weeping lesions and crystallised kino
Browning/blackening of the bark
Lifting and curling of the bark
Smaller foliage
Dead foliage
Tip dieback
Epicormic flushes on stems dying back

I reiterate that the trees were planted and the client wants to save them, the site also has a BCC VPO but I am yet to be advised what type.

Pictures are best to tell the story.

An infected tree

Looking up the trunk, notice the darker bark and weeping kino

Close up of a dead piece that shed

The tree at the end close enough to dead

Close up of the top

A tree at the other end almost dead

Close up of the top

What you see when you look along a live branch

In this picture all the spotty gums have an "S" near the top of them, this picture shows how well the other vegetation is doing.

I mentioned earlier that I have been watching this for a while, well the last place I saw a lot of infected trees that were simply cut down was at the http://maps.google.com.au/maps?f=q&source=s_q&hl=en&geocode=&q=stafford+brisbane&aq=&sll=52.805143,-2.116347&sspn=0.066727,0.264187&g=stafford&ie=UTF8&hq=&hnear=Stafford+Queensland&ll=-27.411205,153.003148&spn=0.003062,0.008256&t=h&z=18.

These next two picture taken from a mobile phone show a similar infection, but these trees did have basal wounds however they have the same symptoms. Pictures taken 21 June 2008.

Eric Frei · 3rd July 2011, 10:03 AM

We have taken soil samples and it may take up to 3 weeks to get some results back. At least that might point us in the right direction for what to rectify to provide the best possible solution.

To help others out there jog their memories or get pro-active ......

I'll start listing locations starting with a real bad one that, Brisbane City Council actually removed a tree from, it's one of their parks.

The park is called Murray Duus Park and is opposite the Wavell Heights Bowls Club on Edinburgh Castle Road. In and near the dog park entry on the SW corner of the park is 3 badly infected spotted gums, symptoms appear the same.

http://maps.google.com.au/maps?q=murrAy+duus+park&ll=-27.401371,153.040288&spn=0.001512,0.004128&oe=utf-8&client=firefox-a&fb=1&gl=au&cid=0,0,1081606475368998560&t=h&z=19
Now I'll list a series of 3 maps showing a tree that was removed, which declined rapidly, I cannot tell if it was a spotted gum from the aerial shot but I do know it is now gone. Also the area did not flood, confirmed talking to locals and from flood maps.

And here is the 3 trees I am interested in.

Brent Ferris · 4th July 2011, 04:48 AM

I don't know anything about spotted gum, but all the trees in question are near the roadway. A foliar analysis of possible herbicides, or pollutant fumes might be worth doing.

Apocalypsse · 4th July 2011, 11:42 AM

Could have been some chemicals flowing through the creek the trees picked up. Industries still like dumping all kinds of crap down our local creeks.

Eric Frei · 4th July 2011, 04:21 PM

Two different locations 30km+ apart, I doubt it.

Here's another location, Kidspace Playground Murphy road Chermside.

Kidspace Playground Murphy road Chermside

Pictures taken today, we also have a dead Tallowwood, same symptoms, it was in very close proximity to infected spottygum.

Here's looking along a branch of the Tallowwood, note the epicormic flush that died.

This is looking at the Spottedgum, also note the epicormic flush. So the Tallowwood symptoms pretty much the same including the darkened bark.

This is the trunk of the Tallowwood, weeping lesion.

All these spottygums are infected, the middle one I will do a close up of the trunk.

Here's the close up of the trunk of the spottygum.

So you want to see the Tallowwood and the Spottygum trunks next to each other, Tallowwood to the left.

I can do this all day long, there is an epidemic and I doubt I am the only one seeing this, who knows something about this?

Jeff Darby · 4th July 2011, 05:55 PM

Has the lay of the land been altered in anyway ? recently..

Eric Frei · 4th July 2011, 06:09 PM

No .......

Eric Frei · 5th July 2011, 02:54 PM

This has now been reported to BCC and DPI (DPI ref 801197).

Just today I also noted a few more, there's a spotted gum near the round-a-bout in the Logan Hyperdome which is infected.

There are 3 spotted gums on the eastern embankment of the M1 between Springwood and Gateway overpass infected. I cannot nail the exact spot as it's a 100km/hr freeway and no stopping.

Eric Frei · 6th July 2011, 03:50 PM

Quote:

Originally Posted by Eric Frei

There are 3 spotted gums on the eastern embankment of the M1 between Springwood and Gateway overpass infected. I cannot nail the exact spot as it's a 100km/hr freeway and no stopping.

I have a more accurate location now. As you are travelling south you go beneath Underwood road. Then there some spotty gums on your left behind house 3 to 11 Rothon Drive. Also some a little further up.

http://maps.google.com.au/maps?q=M1+...02064&t=h&z=19

Also received email confirmation that Biosecurity Qld will see if they can help in identifying the pathogen.

Darrell Mcleod · 6th July 2011, 04:00 PM

Oh oh could be totally wrong!!

Is it Quambalaria or something similar

Ran across a Corymbia ficifolia down here with something similar

Take a section of the wood that is infected and perhaps some soil samples also and have them tested perhaps

James Sayers · 6th July 2011, 04:14 PM

went past park tosouth pine rd way and there looked like a few lemon cented gums had lots of die back in them might be maculata as well there as i never stopped let me know if u want street and park name ekka

Eric Frei · 6th July 2011, 04:58 PM

Pomie,

Yes, give me the location and I'll have a look. Try Google maps.

A soil test in is progress for my clients location.

It's not Quambalaria judging by the QLD DPI's description.... could be a different strain or something.

Eric Frei · 6th July 2011, 05:04 PM

Spotted gums in the median reserve of Oateson Skyline Drive, Seven Hills, Queensland mildly infected.

Oateson Skyline Drive, Seven Hills, Queensland - Google Maps

James Sayers · 6th July 2011, 07:30 PM

teralba park camelia pullen rd and osborne rd everton park map 140 m1 hope it helps

Eric Frei · 6th July 2011, 08:11 PM

Yes .... they are.

I drove through there a while ago for a job and they are.

pullen rd and osborne rd everton park - Google Maps

Sunraysia Tree Solutions · 6th July 2011, 09:28 PM

Another quick/dirty test is to take some of the kino/sap and try to infect some young citras or maculatas by sap transfer and see if they start to show symptoms ?

This may rule out a viral disease ?

Darrell Mcleod · 7th July 2011, 08:47 AM

Have you read this?

Not saying it is - just interesting!!

http://www.australasianplantpatholog...pr07%20POM.pdf

And do you remember my post some time back

Corymbia ficifolia

Something going on with Corymbias and will be really interested when you get to the bottom of this

Eric Frei · 8th August 2011, 09:59 PM

Soil test results returned and a special blend was made to correct pH and deficiencies.

Included was 2.5kg of a trichoderma and mycorrhizal fungi blend. From my picture thread .....

Quote:

Originally Posted by Eric Frei

The tool, a Stihl BT45 with 25mm dia tungsten tip drill to bore a series of holes ....

Then apply the jungle juice, a special blend after getting the soil test results back.

Eric Frei · 12th August 2011, 07:19 PM

DPI have got back to me with some news.

Thanks to them I have now sourced an April 2011 PDF about this disease.

I will also be taking samples to them for further analysis, seems the disease is relatively new but a concern due to new hardwood forests being affected.

From page 125 of attached 13mb 2011 PDF here:-

Quote:

108 Spotted gum canker: an emerging threat
to eucalypt plantations in subtropical
eastern Australia

A.J. Carnegie1, S. Malfroy2, G.S. Pegg3, A. Kathuria1, R. Daniel2,
D. Guest2

1Forest Science Centre, Industry & Investment NSW, PO Box 100,
Beecroft, 2119; 2Agriculture, Food and Natural Resources, The University
of Sydney, Eveleigh, NSW, 2015; 3Horticulture and Forestry Science, Agri‐
Science Queensland, Queensland, Australia, 4068

Spotted gums (Corymbia variegata, C. citriodora, C. maculata
and C. henryii) are major species in eucalypt plantations in
subtropical eastern Australia, encompassing up to a third of
the area planted for solid wood products. These species are
also a significant component of the native flora along the
east coast of Australia. Forest health surveys over the past 15
years in New South Wales and Queensland have identified
key pests and diseases of spotted gum plantations, chief
amongst these being Quambalaria Shoot Blight. However, in
recent years a stem canker disease has emerged as a
threatening agent in young (3–10 year‐old) spotted gum
plantations. The disease appears to begin in the tips of
branches in the upper crown, and ‘spreads’ down into the
main stem, ultimately killing trees. Surveys have identified
the disease from all regions in subtropical Australia where
spotted gum is grown, but the disease is more severe in
northern NSW, where up to 50% of trees have moderate to
severe damage. Two fungi, tentatively identified as
Caliciopsis ‘pleomorpha’ and Guignardia sp., have
consistently been isolated from diseased material. The
identity of these fungi is being determined using
morphological and molecular characters and their role in
disease confirmed using Koch’s Postulates. Pathogenicity
work has identified Corymbia species as being highly
susceptible. Ongoing work is identifying key features
associated with the disease to develop sampling strategies
and hazard risk maps.

Page 36 from the 2006-2007 NSW DPI PDF attached below:-

Quote:

Stem canker fungi, including Botryosphaeria spp., Cryphonectria eucalypti and
Caliciopsis sp., are continuing to increase in incidence and severity in the older
plantations. Severe damage was observed in several plantations in 2006–07. In
many cases this was associated with tree stress, such as that caused by repeated
defoliation through leaf fungi (Kirramyces spp.). Caliciopsis sp. caused significant
damage (cankers and dead topping) in several E. nitens plantations on the Dorrigo
Plateau. The long-term impact of stem fungi on tree survival and wood quality is
unknown. Some stem fungi in NSW eucalypt plantations are still unidentified and
require detailed taxonomic work.

Eric Frei · 18th September 2011, 10:44 AM

DEEDI unable to identify pathogen from microscopy of samples.

Informed they are looking further into it and checking hardwood plantations.

Eric Frei · 6th November 2011, 09:31 PM

There appears to be a fair bit of similarity between this pathogen and the one they have been fighting in WA for a few years now.

wa-fungal-canker-growing-on-trees | News | Environment and climate

Quote:

Written by Tellisha Dunlop Thursday, 20 October 2011 14:00

"There are a number of tree declines [from the pathogen] occurring in the south-west of the State and we need to make people more aware of the implications.”—Prof Hardy. Image Murdoch University

MURDOCH University researchers warn that a destructive form of tree canker is killing the WA native trees. Known as Marri canker, it also affects ‘red-flowering gum’ and is just beginning to be understood.

Centre of Excellence for Climate Change Woodland and Forest Health Professor Giles Hardy says, “There are a number of tree declines [from the pathogen] occurring in the south-west of the State and we need to make people more aware of the implications. We want to get people talking about what is going on and how we might manage forest health at a landscape and regional scale.”

Dr George Matusick also from the Centre has also noticed large declines in Tuart, Wandoo and Peppermint, dead specimens estimated to be 150 to 200 years old. They have identified large areas of the Northern Jarrah forest (Perth Hills to Collie) that have unexpectedly died during a usual drought cycle.

Professor Hardy says if WA’s trees fall to canker, “Potentially we will see more wildfires or hotter control burns, loss of [stored] carbon and we’ll see fewer larger trees. For a Mediterranean climate WA is unique for the size and magnificence of its trees, so with time we could well lose this uniqueness.”

“Loss will result in changes in faunal communities as well as [understory] flora and fauna.”

Professor Hardy views the canker as one of the big concerns, he says that his team has worked out the cause but now needs funding to determine how to control the pathogens. This can be through understanding the biology and pathology of the fungus involved and its population structure and genetics. Fungi of the species Quambalaria, Endothiella and Sporothrix all appear to cause canker-like lesions on the trees.

“We should also be looking for trees with no cankers and breeding from these and determining are they resistant."

“This would allow us to restore landscapes with resistant individuals. We can also look at biological control and chemical control,” he says.

Professor Hardy believes this will take approximately 10 years.

More information about the extent and causes of the tree crises, as well as proposals to reduce and manage the declines will be discussed at the Managing for Healthy Forests Symposium at Henley Brook on Friday, October 21.

Professor Hardy hopes to engage more of the community in understanding the processes involved in forest and woodland health, with an emphasis on the key tree species.

Eric Frei · 29th April 2012, 04:33 PM

A lot of what is in this ABC video could be at play here.

Tree Deaths| ABC| Australian focused 2012 must see

16th June 2011, 07:33 PM	#1
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research For some time now I have observed a strange dieback of spotty gums (Corymbia citriodora and maculata). At first I thought it was drought related but we have had good rain now since December 2007. On a site today all spotted gums were affected in varying degrees. Some were pretty much dead whilst others had the signs of the pathogen and of course some were in between. Even saplings were diseased and dead/dying. The trees on this site were planted in 1996 so it rules out construction damage. The trees are in garden beds with other trees that are doing fine so it is species specific. Two garden beds are separated by a 10m wide concrete driveway built well for large trucks so I rule out disease transmission by root grafting. Other species nearby include wattles which are healthy. There was no basal wounds, no signs of tampering or places for a pathogen to enter. No fruiting bodies at ground level. I think the disease is definitely a fungal pathogen in the vascular system. So is it the xylem or phloem that is blocked? Or both perhaps? Symptoms are:- Weeping lesions and crystallised kino Browning/blackening of the bark Lifting and curling of the bark Smaller foliage Dead foliage Tip dieback Epicormic flushes on stems dying back I reiterate that the trees were planted and the client wants to save them, the site also has a BCC VPO but I am yet to be advised what type. Pictures are best to tell the story. An infected tree Looking up the trunk, notice the darker bark and weeping kino Close up of a dead piece that shed The tree at the end close enough to dead Close up of the top A tree at the other end almost dead Close up of the top What you see when you look along a live branch In this picture all the spotty gums have an "S" near the top of them, this picture shows how well the other vegetation is doing. I mentioned earlier that I have been watching this for a while, well the last place I saw a lot of infected trees that were simply cut down was at the http://maps.google.com.au/maps?f=q&source=s_q&hl=en&geocode=&q=stafford+brisbane&aq=&sll=52.805143,-2.116347&sspn=0.066727,0.264187&g=stafford&ie=UTF8&hq=&hnear=Stafford+Queensland&ll=-27.411205,153.003148&spn=0.003062,0.008256&t=h&z=18. These next two picture taken from a mobile phone show a similar infection, but these trees did have basal wounds however they have the same symptoms. Pictures taken 21 June 2008. Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

3rd July 2011, 10:03 AM	#2
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research We have taken soil samples and it may take up to 3 weeks to get some results back. At least that might point us in the right direction for what to rectify to provide the best possible solution. To help others out there jog their memories or get pro-active ...... I'll start listing locations starting with a real bad one that, Brisbane City Council actually removed a tree from, it's one of their parks. The park is called Murray Duus Park and is opposite the Wavell Heights Bowls Club on Edinburgh Castle Road. In and near the dog park entry on the SW corner of the park is 3 badly infected spotted gums, symptoms appear the same. http://maps.google.com.au/maps?q=murrAy+duus+park&ll=-27.401371,153.040288&spn=0.001512,0.004128&oe=utf-8&client=firefox-a&fb=1&gl=au&cid=0,0,1081606475368998560&t=h&z=19 Now I'll list a series of 3 maps showing a tree that was removed, which declined rapidly, I cannot tell if it was a spotted gum from the aerial shot but I do know it is now gone. Also the area did not flood, confirmed talking to locals and from flood maps. And here is the 3 trees I am interested in. Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

4th July 2011, 04:48 AM	#3
Brent Ferris Veteran Heritage Status Join Date: Jun 2010 Location: Toronto, Ontario, Canada Posts: 1,557	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research I don't know anything about spotted gum, but all the trees in question are near the roadway. A foliar analysis of possible herbicides, or pollutant fumes might be worth doing. __________________ My business: Tree Pruning and Removals -- Strump Removals -- Advice -- Consulting -- Arborist Reports Consulting Forester If you want an honest opinion, call Brent Ferris...because, Trees want to Live Too ! We do great jobs, even in small yards. Free Estimates Oakville to Oshawa - North to Bradford (Will travel further if cost of travelling covered) Email -- treeshaveneeds@3web.com Cell 416-460-5704 Last edited by Brent Ferris; 4th July 2011 at 03:24 PM. Reason: typo

4th July 2011, 11:42 AM	#4
Apocalypsse Veteran Heritage Status Join Date: Feb 2009 Location: Victoria, Australia Posts: 1,152	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Could have been some chemicals flowing through the creek the trees picked up. Industries still like dumping all kinds of crap down our local creeks.

4th July 2011, 04:21 PM	#5
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Two different locations 30km+ apart, I doubt it. Here's another location, Kidspace Playground Murphy road Chermside. Kidspace Playground Murphy road Chermside Pictures taken today, we also have a dead Tallowwood, same symptoms, it was in very close proximity to infected spottygum. Here's looking along a branch of the Tallowwood, note the epicormic flush that died. This is looking at the Spottedgum, also note the epicormic flush. So the Tallowwood symptoms pretty much the same including the darkened bark. This is the trunk of the Tallowwood, weeping lesion. All these spottygums are infected, the middle one I will do a close up of the trunk. Here's the close up of the trunk of the spottygum. So you want to see the Tallowwood and the Spottygum trunks next to each other, Tallowwood to the left. I can do this all day long, there is an epidemic and I doubt I am the only one seeing this, who knows something about this? Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

4th July 2011, 05:55 PM	#6
Jeff Darby Moderator - Previously known as JayD Join Date: Feb 2007 Location: TreeWorld, Sydney Australia Posts: 2,059	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Has the lay of the land been altered in anyway ? recently.. __________________ Member: Australian Tree Association Join the Australian Tree Association...Have your voice heard ! Arboriculture, A life long study for some, a passing phase for others © Jeffrey J Darby 2011

4th July 2011, 06:09 PM	#7
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research No ....... __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

5th July 2011, 02:54 PM	#8
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research This has now been reported to BCC and DPI (DPI ref 801197). Just today I also noted a few more, there's a spotted gum near the round-a-bout in the Logan Hyperdome which is infected. There are 3 spotted gums on the eastern embankment of the M1 between Springwood and Gateway overpass infected. I cannot nail the exact spot as it's a 100km/hr freeway and no stopping. __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

6th July 2011, 04:00 PM	#10
Darrell Mcleod Mature tree Join Date: Jul 2010 Location: Victoria Australia Posts: 242	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Oh oh could be totally wrong!! Is it Quambalaria or something similar Ran across a Corymbia ficifolia down here with something similar Take a section of the wood that is infected and perhaps some soil samples also and have them tested perhaps

6th July 2011, 04:14 PM	#11
James Sayers Semi-mature vigorous tree Join Date: Jul 2007 Location: brisbane Posts: 84	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research went past park tosouth pine rd way and there looked like a few lemon cented gums had lots of die back in them might be maculata as well there as i never stopped let me know if u want street and park name ekka

6th July 2011, 04:58 PM	#12
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Pomie, Yes, give me the location and I'll have a look. Try Google maps. A soil test in is progress for my clients location. It's not Quambalaria judging by the QLD DPI's description.... could be a different strain or something. __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

6th July 2011, 05:04 PM	#13
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Spotted gums in the median reserve of Oateson Skyline Drive, Seven Hills, Queensland mildly infected. Oateson Skyline Drive, Seven Hills, Queensland - Google Maps __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

6th July 2011, 07:30 PM	#14
James Sayers Semi-mature vigorous tree Join Date: Jul 2007 Location: brisbane Posts: 84	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research teralba park camelia pullen rd and osborne rd everton park map 140 m1 hope it helps

6th July 2011, 08:11 PM	#15
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Yes .... they are. I drove through there a while ago for a job and they are. pullen rd and osborne rd everton park - Google Maps __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

6th July 2011, 09:28 PM	#16
Sunraysia Tree Solutions Semi-mature vigorous tree Join Date: Aug 2007 Location: Mildura Posts: 117	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research Another quick/dirty test is to take some of the kino/sap and try to infect some young citras or maculatas by sap transfer and see if they start to show symptoms ? This may rule out a viral disease ?

18th September 2011, 10:44 AM	#20
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research DEEDI unable to identify pathogen from microscopy of samples. Informed they are looking further into it and checking hardwood plantations. __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

29th April 2012, 04:33 PM	#22
Eric Frei Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane Posts: 12,996	Re: Spotted\| Spotty Gum\| Dieback\| Disease\| Brisbane - research A lot of what is in this ABC video could be at play here. Tree Deaths\| ABC\| Australian focused 2012 must see __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Palm and Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

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