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Phoenikakias

Sabal disease

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Phoenikakias

Can somebody identify the disease affecting my Sabal collection showed in the posted pictures below? It has killed over the previous years several Sabal specimens and symptoms have been always identical. Recently I have removed last 4 affected specimens (palmetto, domingensis, mexicana and minor) and made an autopsy on them. 

Palmetto on the right, domingensis on the left.

20190707_085502.jpg

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Phoenikakias

Palmetto

20190707_085551.thumb.jpg.3ad984bb6082c3ded4c819e9f97389d2.jpg

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Phoenikakias

Domingensis

20190707_085628.thumb.jpg.b59840533c5d46c1cf2f6d6eb43d182c.jpg

Edited by Phoenikakias

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20190707_085701.thumb.jpg.528e1d12f82bc4041cab9eace7b299f9.jpg

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Phoenikakias

Mexicana

20190707_090513.thumb.jpg.d02cd1570e12a41f5603e499d8829695.jpg

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Phoenikakias

Minor

This one had remained in the ground more years after infection and therefore basal plate has quite rotten.20190707_092721.thumb.jpg.e86c1117f15536be998e34589802860b.jpg

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20190707_092924.thumb.jpg.eb9b5aa2e71b57d6e11eb5ccfc87ff35.jpg

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Dissection of domingensis

20190707_091248.thumb.jpg.a7f411e7bc354238f298acfc6d0636e5.jpg

Edited by Phoenikakias

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20190707_091552.thumb.jpg.098cab3772a7e1a23369e67e8e54e640.jpg

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20190707_091657.thumb.jpg.8dcce6c52af08e1650907156325e90c7.jpg

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20190707_092131.thumb.jpg.8b114b23f0fbde852b21641bd804a7c9.jpgDissection of mexicana with a seemingly healthy basal plate

Edited by Phoenikakias

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20190707_092710.thumb.jpg.2c95c5734ee732460a4a674af894debb.jpg

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20190707_094256.thumb.jpg.fc23c5967c5c8335dced7c93a80969e0.jpg

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20190707_094735.thumb.jpg.ad82aff026e2bd2f6f2c11311aa4e6b2.jpg

Edited by Phoenikakias

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Yort

- Pythium? 

- Ilyonectria palmarum sp. nov?

Edited by Yort
  • Upvote 1

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1 hour ago, Yort said:

- Pythium? 

- Ilyonectria palmarum sp. nov?

Symptoms do not appear initially on the spear region but rather on the latest rosette of fully developed leaves, which die rapidly, and then disease proceeds to emerging spear leaves until spear pull or elimination of any part of spear outside the sheath. Then growth stops and remain alive still only older leaves for an indefinite time. The minor bloomed and fruited last year  though already dead. I did not manage to save a single plant!

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