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Palm seedlings turning white

SoulofthePlace

By SoulofthePlace
in DISCUSSING PALM TREES WORLDWIDE

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SoulofthePlace Proficient

SoulofthePlace

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Does anyone know why these palm seedlings turning white and drying out? I water them sufficiently. Perhaps they are overwatered? They are kept in a large garage building which has it's 20% roof as a polymer plastic window without direct sunlight. For some days there was a lawnmower tractor standing near the table with the seedlings, perhaps gasoline fumes could have influenced these seedlings? This happened during summer while the temperatures in the garage are around 27C to 30C. Not all palm seedlings started turning white. Worst affected were Veitchia arecina (montgomeryana), but seedlings of another palm that grows fast: Hyophorbe Indica "Southern", started having brown tips (first photo). Yet Sabal palmetto "Lisa" and even Adonidia merrilliui were unaffected. There is one Roystonea regia "Florida" in one of the photos as well (Photo # 7). While the other species Beccariophoenix alfredii, germinated last year, this year they stopped growing and one seedling even declined. I brought many affected palm seedlings to the outside now and placed them on the east side of the garage. I assume they will be safer than on the west side?

The 8th photo are Cocothrinax barbadensis seedlings (about 6 of them germinated out of 100 seeds from RPS) last year and are slow growers. The photo # 1 shows Hyophorbe indica "Southern" browning at the tips while they are NO PROBLEM growers usually. The 9th photo showing same Veitchia arecina (montgomeriana) in a community pot since last year where they were germinated, which is located in another room of the same garage connected by open doorways, and these seedlings do not have any problems, although they kind of stopped growing. The last photo are Roystonea regia.

 

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Edited by SoulofthePlace

Average day temperatures: +17°C in the winter and +24°C in the summer. Typical Summer: 68F to 77F (20C to 25C). Typical Winter: 55F to 64F (12C to 18C). Record Low (past 5 years): 45F or +7.7C (once a winter, some winters). Record High (past 5 years): 83F or +28C (some days only). Elevation 140 m (459 ft.) to 160 m (525 ft.), latitude 38.54º. Sunset Zone: unknown

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Silas_Sancona Grand Master

Silas_Sancona

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1 hour ago, NatureGirl said:

Severe Spider Mite Attack

Agree w/ NatureGirl.. Esp. if these are in a room w/ low light / very little / no air movement ( perfect environment for mites ).. May also be too wet ( which will lead to other issues / make spider mite issues worse )

Would put them outside somewhere where there is more air movement if possible and hope for the best.

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SoulofthePlace Proficient

SoulofthePlace

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Thank you. I have placed the seedlings outside, on the east side of the large building, giving shade in the afternoons. Some of the seedlings placed outside before in another location used to quickly burn, such as Beccariophoenix alfredii and Hyophorbe Indica "Southern". The garage humidity is constantly about 60% something or in the 50%s.

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Average day temperatures: +17°C in the winter and +24°C in the summer. Typical Summer: 68F to 77F (20C to 25C). Typical Winter: 55F to 64F (12C to 18C). Record Low (past 5 years): 45F or +7.7C (once a winter, some winters). Record High (past 5 years): 83F or +28C (some days only). Elevation 140 m (459 ft.) to 160 m (525 ft.), latitude 38.54º. Sunset Zone: unknown

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SoulofthePlace Proficient

SoulofthePlace

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Some of the pots in the garage have their soil turned a bit whitish that smells like a penicillin.

Average day temperatures: +17°C in the winter and +24°C in the summer. Typical Summer: 68F to 77F (20C to 25C). Typical Winter: 55F to 64F (12C to 18C). Record Low (past 5 years): 45F or +7.7C (once a winter, some winters). Record High (past 5 years): 83F or +28C (some days only). Elevation 140 m (459 ft.) to 160 m (525 ft.), latitude 38.54º. Sunset Zone: unknown

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SoulofthePlace Proficient

SoulofthePlace

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Will diatomaceous earth help get rid of spider mites?

Average day temperatures: +17°C in the winter and +24°C in the summer. Typical Summer: 68F to 77F (20C to 25C). Typical Winter: 55F to 64F (12C to 18C). Record Low (past 5 years): 45F or +7.7C (once a winter, some winters). Record High (past 5 years): 83F or +28C (some days only). Elevation 140 m (459 ft.) to 160 m (525 ft.), latitude 38.54º. Sunset Zone: unknown

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Steve Mac Grand Master

Steve Mac

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29 minutes ago, SoulofthePlace said:

Will diatomaceous earth help get rid of spider mites?

I doubt it, I would use a specific miticide, normal insecticide doesn't even get rid of them.   

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Cheers Steve

It is not dead, it is just senescence.

   

 

 

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GottmitAlex Grand Master

GottmitAlex

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This happened to my coconut palms 2 years ago. But with a copper/reddish colour. I could brush my fingertips over the leaflets and it would stain with a reddish dust.

I highly recommend this:

BIOADVANCED 701287A 3-in-1 Insect, Disease, and Mite Control for Plants, 32-Ounce, Ready-to-Spray https://www.amazon.com/dp/B000WEMIS6

 

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5 year high 42.2C/108F (07/06/2018)--5 year low 4.6C/40.3F (1/19/2023)--Lowest recent/current winter: 4.6C/40.3F (1/19/2023)

 

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