Trees and Shrubs forum: Eucalyptus tree with mystery fungus

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Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
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cliftoncat
Feb 23, 2016 3:25 PM CST
We have an old and very big eucalyptus tree which we have been told is suffering from a fungus. We were told that there was nothing available to cure it - over the last couple of years several smaller branches have died and been cut off. We really love this tree and I wondered if anyone knew of anything that might fix the problem? Confused
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Feb 23, 2016 3:53 PM CST
Do you have any idea which fungus it is said to be? A quick Google for Eucalyptus diseases in the UK only so far turned up two possibilities, one being Armillaria (honey fungus), and the other "silver leaf" disease, which is described here:

http://www.grafton-nursery.co.uk/silverleaf-disease-in-trees...
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 23, 2016 4:17 PM CST
Thanks, Sue - the tree surgeon didn't say what the fungus was. But sadly, whatever it is has affected the trunk - right at the base of the tree a white growth is visible. So if it is silver leaf disease, our poor tree is doomed. I guess I was hoping for some new miracle-cure! Sad
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 23, 2016 4:30 PM CST
Does the white growth look like this?

https://en.m.wikipedia.org/wiki/Chondrostereum_purpureum#/me...
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 23, 2016 4:38 PM CST
No, it's less frilly and less pink - I'll take a photo of it tomorrow (it's night time here now).
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 24, 2016 9:33 AM CST
Yes, a picture would be useful Thumbs up
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 24, 2016 9:56 AM CST
Here are photos of the two bits of fungus at the base of the trunk. When we first saw them (2 years ago), they were much paler in colour - off white.

Thumb of 2016-02-24/cliftoncat/8f3347


Thumb of 2016-02-24/cliftoncat/82b867

The fungus bit in the first photo is where there is a semi-circular smooth-ish lump; in the second photo it's more or less the whole of the bit that sticks out. Hope you can decipher it! Thank you.
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 24, 2016 10:04 AM CST
Does/did it look anything like this (I'm going by the smallish white patch in the lower picture)

https://www.google.ca/search?q=armillaria+white+mycelium&cli...

Have you had any other woody plants get sick?
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 24, 2016 10:31 AM CST
The fungus is the whole lump, not just the white patch; I think the patch is where the surface of the fungus has been chipped. When we first saw them they were much whiter in colour than they are now and pretty smooth on the surface. They have darkened and become lumpier with age. What worries me most is that the two pictures are of lumps of the fungus on opposite sides of the base of the tree trunk, which might suggest that the disease goes right to the centre of the trunk?
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 24, 2016 10:33 AM CST
Sorry, just saw your final question - we have lots of trees, but none of them seem sick. Only the one eucalyptus (not a native, but it gives us some greenery through the winter months).
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 24, 2016 10:51 AM CST
So, it doesn't look like the two fungal diseases I found listed for Eucalyptus in the UK. Going through a process of elimination, I don't think it looks like this either (not a fungus)?

https://www.google.ca/search?q=crown+gall&client=safari&hl=e...
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 24, 2016 11:32 AM CST
I've nipped out and taken a couple more photos to try to help - this time getting the width of the trunk in:


Thumb of 2016-02-24/cliftoncat/c63e72


Thumb of 2016-02-24/cliftoncat/24e279

In both cases, the fungus (if that's what it is) is the circular protrusion. In the second photo, it's just at ground level where there's brown earth, slightly to the right of centre. Ignore the hole in the grass - a critter...

And the tree:

Thumb of 2016-02-24/cliftoncat/a685c3

Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 24, 2016 12:02 PM CST
I just looked through a couple of books I have on plant diseases that focus on the UK and nothing specific for Eucalyptus. I wonder if it is a generalist problem, or if the tree is declining and a fungus taking advantage. Does a qualified tree surgeon there have to just be skilled in taking them down/pruning, or do they have to have some knowledge of pests and diseases? If the latter, could you call and ask what specific disease he/she thinks it is?

Another option would be if you are an RHS member, because they have a diagnostic and advisory service which, as far as I recall from when I was a member, is free to members. If not a member, might be worth joining just for that to get a prognosis. You can email them pictures of problems as well as send samples if they need them:

https://www.rhs.org.uk/membership/rhs-gardening-advice/sendi...
Name: Mika
Oxfordshire, England and Mento
Plant Lover: Loves 'em all! Critters Allowed Daylilies Irises Roses Hostas
Birds Multi-Region Gardener Cat Lover Dog Lover Ponds Foliage Fan
Image
cliftoncat
Feb 24, 2016 12:29 PM CST
Thanks, Sue - I am indeed a member of the RHS, so I'll contact them tomorrow. Thanks! Thank You!
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Feb 24, 2016 12:47 PM CST
That's great! Do let us know what they say. I'm pondering rejoining - I was a member for years but a lot of the perks don't really apply overseas and with the unfavourable currency exchange I let it drop. Used to love going to Wisley when I still lived there Sighing!

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