Phoenix and Phusarium

philodendron · 29th January 2008, 04:30 AM

Hi to all you experienced arborists - having read some of the pithy interchanges in the forum I may cease my subscriptions to various saucy publications and just read Tree World Forum - much more exciting !
On a more serious note, as a horticultural consultant I recently came across a Phoenix canariensis in a client's garden which looks to me as if it is showing symptoms of Fusarium oxysporum[see pics]. Would anyone like to offer their opinion? My understanding is that there is no remedy - has drenching with neem solution been tried? Do the phosphonic acid products have any effect?
I await the fullness of your collective wisdom.......
Regards
Philodendron.
PS I can't work out how to attach a pic to this mail as the site asks for a 'URL' for the pic - what does this mean?? How do I do it ? Am I too old for this ??
/iPhoto Library/2008/01/24/P1020421.JPG
/iPhoto Library/2008/01/24/P1020425.JPG
/iPhoto Library/2008/01/24/P1020427.JPG
/iPhoto Library/2008/01/24/P1020414.JPG
/iPhoto Library/2008/01/24/P1020428.JPG
/iPhoto Library/2008/01/24/P1020418.JPG

azrael · 29th January 2008, 11:10 AM

U can try imageshack...that's what I use ImageShack® - Hosting

clementine · 29th January 2008, 02:41 PM

Alternatively, try the "Paperclip" symbol next to the smilie above the image insert.
Then upload from your PC. This will enable a link to the photos.

philodendron · 29th January 2008, 05:39 PM

Philodendron has managed to attach the pix of the diseased Phoenix canariensis - hallelujah! Fusarium or other ?????
I await your valued professional opinions........

P1020428.jpg

P1020427.jpg

P1020425.jpg

P1020421.jpg

P1020418.jpg

P1020414.jpg

azrael · 29th January 2008, 08:04 PM

Mmm..is that a mix of pics there ... me-thinks not all of the same specimen...are some googled images????.

What is the precise location of this Phoenix palm ... that may well be salt-burn if its close to the ocean.

Fusarium wilt of palms - Botanic Gardens Trust - Sydney, Australia

I dont see the tell-tale discoloration of the vascular tissue in the shafts as you would expect with Fusarium wilt.

It is a systemic disease, spreading from the ground up thru' the vascular system...the presence of mould dust on the trunk is probably just an unrelated opportunist IMO. (I could VERY well be wrong there).

Seems like the diagnostic confirmation is no so straight forward either.

A bit more case history would be good...especially IF it is a transplant (?)

philodendron · 29th January 2008, 08:52 PM

Thanks for your thoughts on the Phoenix. All pics are of the subject tree, which is in an old garden in Hornsby, tho the tree has only around 1-2 metres to the crown so I would guess only a 30 or so year old palm [good soil, water etc].
The fungus as you say may be saprophytic - the close up of a frond base does show one side browning off tho, typical of Fusarium I believe. I can't seem to find any pix of the fruiting bodies of Fusarium so far.
The old leaf bases on one side are soft and crumbly, but of course this may just be them breaking down under the fungus - there is a lot of wet material amongst the leaf bases after the rrecent rain. Hmmmmm.....

azrael · 30th January 2008, 02:03 AM

Hmmmm.....forget my post then.....Not salt-burn (not at Hornsby)....the detective work continues.

Ekka · 31st January 2008, 01:30 AM

Dont forget this thread, lots of info.

Palm disease information

It's fungal and there's lots of docs there, but the one on petiole blight says this which is likely common for most fungi.

Quote:

It is critical to understand that fungicides do not
cure the damage already present on the palm. Plant
tissue does not “heal” itself. Once the damage
occurs, it will remain for the duration of the life of
that particular leaf. Fungicides are used to prevent
further spread of the disease by protecting a leaf
petiole and rachis that has not yet been infected by the
fungal pathogen.

Seems systemic fungicide for protection is the answer ... which one is a guess. You need to try, that's all. I try between copper based, sulphur based and perhaps something like ausphos600 etc.

29th January 2008, 04:30 AM	#1 (permalink)
philodendron Sappling Join Date: Jan 2008 Location: Sydney, Australia Posts: 8	Phoenix and Phusarium Hi to all you experienced arborists - having read some of the pithy interchanges in the forum I may cease my subscriptions to various saucy publications and just read Tree World Forum - much more exciting ! On a more serious note, as a horticultural consultant I recently came across a Phoenix canariensis in a client's garden which looks to me as if it is showing symptoms of Fusarium oxysporum[see pics]. Would anyone like to offer their opinion? My understanding is that there is no remedy - has drenching with neem solution been tried? Do the phosphonic acid products have any effect? I await the fullness of your collective wisdom....... Regards Philodendron. PS I can't work out how to attach a pic to this mail as the site asks for a 'URL' for the pic - what does this mean?? How do I do it ? Am I too old for this ?? /iPhoto Library/2008/01/24/P1020421.JPG /iPhoto Library/2008/01/24/P1020425.JPG /iPhoto Library/2008/01/24/P1020427.JPG /iPhoto Library/2008/01/24/P1020414.JPG /iPhoto Library/2008/01/24/P1020428.JPG /iPhoto Library/2008/01/24/P1020418.JPG

29th January 2008, 11:10 AM	#2 (permalink)
azrael Banned Join Date: Dec 2007 Location: Earth Australia Posts: 321	Re: Phoenix and Phusarium U can try imageshack...that's what I use ImageShack® - Hosting

29th January 2008, 02:41 PM	#3 (permalink)
clementine Mature tree Join Date: Apr 2007 Location: Central Portugal Posts: 285	Re: Phoenix and Phusarium Alternatively, try the "Paperclip" symbol next to the smilie above the image insert. Then upload from your PC. This will enable a link to the photos. __________________ Meddle not in the affairs of dragons - for you are crunchy and taste of chicken! Builder in Central Portugal

29th January 2008, 05:39 PM	#4 (permalink)
philodendron Sappling Join Date: Jan 2008 Location: Sydney, Australia Posts: 8	Re: Phoenix and Phusarium Philodendron has managed to attach the pix of the diseased Phoenix canariensis - hallelujah! Fusarium or other ????? I await your valued professional opinions........ P1020428.jpg P1020427.jpg P1020425.jpg P1020421.jpg P1020418.jpg P1020414.jpg

29th January 2008, 08:52 PM	#6 (permalink)
philodendron Sappling Join Date: Jan 2008 Location: Sydney, Australia Posts: 8	Re: Phoenix and Phusarium Thanks for your thoughts on the Phoenix. All pics are of the subject tree, which is in an old garden in Hornsby, tho the tree has only around 1-2 metres to the crown so I would guess only a 30 or so year old palm [good soil, water etc]. The fungus as you say may be saprophytic - the close up of a frond base does show one side browning off tho, typical of Fusarium I believe. I can't seem to find any pix of the fruiting bodies of Fusarium so far. The old leaf bases on one side are soft and crumbly, but of course this may just be them breaking down under the fungus - there is a lot of wet material amongst the leaf bases after the rrecent rain. Hmmmmm.....

30th January 2008, 02:03 AM	#7 (permalink)
azrael Banned Join Date: Dec 2007 Location: Earth Australia Posts: 321	Re: Phoenix and Phusarium Hmmmm.....forget my post then.....Not salt-burn (not at Hornsby)....the detective work continues.

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