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Palms and Cycads: Dying Washingtonia Robusta

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Forum: Palms and CycadsReplies: 19, Views: 277
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AuthorContent
Chiefengineer
MIssion Valley, TX
(Zone 9a)

March 23, 2009
10:18 AM

Post #6307598

The attached is a pic , originally posted in the wrong forum, growing in 9A in a row
of 16 next to my driveway. All the others are perfect, and this one was
one of my best. They are all 5 years old, 2 in the ground. In one day the
whole thing browned and slumped. It was after the first rain in 6 months.

I can find no mold or rot, bugs or disease. Just radical rapid browning.
All the others are green. Even the crown is beginning to brown. It had been
fertilized with palm tree spikes the same as the other trees...being a smaller
tree I cut spikes (maybe root burn?). I sprayed the crown with anti-fungal
agent, flushed the roots, and fertilized with manganese and some time-release
balanced granules. I have never seen anything go down so fast. I have
queens, pindos, and canaries thriving.

The non-palm-forum suggested some things. Any guesses?:
We had a long drought and live 40 clicks from the ocean so it could be salts.
In Texas it also could be toxins, since it is 3 feet from the neighbors' cattle pasture.
They spray the fence line with vegetation killer 3x/yr. and maybe some of this
washed into the roots, but it doesn't seem like it would kill a whole tree.
All the other trees are on the fence line and fine.

Would anyone prune the dead stuff off right away?

Thumbnail by Chiefengineer
Click the image for an enlarged view.

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