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Rot inside mexican fan palm

JustPalmsTampa

By JustPalmsTampa
in DISCUSSING PALM TREES WORLDWIDE

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JustPalmsTampa Newbie

JustPalmsTampa

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hello, long time lurker here with a first time post. 

recently i was removing a mexican fan palm and came across some internal rot. ive seen it before and never really gave it much thought about what the cause was. THis palm was about 45 feet tall, very good looking canopy with no visable distress. the one piece was about a foot from ground level as you can see the aerial roots on that piece. The other 2 pieces were maybe half way up or so.

Any thoughts on what ailment this might be. THanks

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Merlyn Grand Master

Merlyn

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2 hours ago, JustPalmsTampa said:

recently i was removing a mexican fan palm and came across some internal rot. ive seen it before and never really gave it much thought about what the cause was. THis palm was about 45 feet tall, very good looking canopy with no visable distress. the one piece was about a foot from ground level as you can see the aerial roots on that piece. The other 2 pieces were maybe half way up or so.

Good question.  There are two fungi that eat the inside of palms, Ganoderma and Thielaviopsis.  I'll link the two UFL descriptions below.  Ganoderma tends to eat the lower part of the palm, and degrades the lignin in the palm starting from the center and going outwards.  You end up with a dead center, similar to your photos.  Thielaviopsis eats the non-lignified fibers (the soft ones) so you end up with a mushy/squishy trunk that only has the small number of rigid fibers inside.  Because of this, it can randomly collapse.  Thielaviopsis goes from the outside (where the infection started) towards the inside.  Ganoderma is probably the disease on your palm, and you might see conks on the side.  The conks sometimes only show up on the North side, and might not show up until the palm is nearly dead.

https://edis.ifas.ufl.edu/publication/PP100

https://edis.ifas.ufl.edu/publication/PP143

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JustPalmsTampa Newbie

JustPalmsTampa

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ive taken down enough ganoderma palms over the years and this definitely wasnt that.  

we come across ganodema more so in queens and canaries, rarely washys.

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