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chad2468emr

Crown rot won’t go away and boots are coming off weird…

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chad2468emr

Hi all, 

A 25 gallon archonto pair I have both are exhibiting crown rot, and their old boots are coming off real weird. When I’d first realized they had rot, I started treating with hydrogen peroxide. It appeared to go away and then eventually I ran out of H2O2 so I left it. Well, it’s back. Darker than it was originally and I see slight dark marks on the new spear growth again. I’ve got more peroxide coming from Amazon this morning, but I have some questions: 

- I had a third palm in this pot when I got it and I’d since cut it out. There was a small stump that rotted and I pulled out most of what I could but could this have caused the rot somehow? 
- If not that stump, I suspect this is from water dripping off the roof each morning and falling into the crown. I live in a townhome and legitimately have no where else I could put this palm that doesn’t get full sun so I fear of it burning if I move it. As it stands, some fronds start to burn already where they peek out around the corner it’s in. (Pic of roof/corner below)
- Is there a systemic fungicide that works to end this once and for all? I have some propiconazole on-hand but noticed no decline when I used it. 
-The palm is shedding its boots really weirdly. They were half dried when I’d caught this weeks ago and I pulled the dried part back to give the living tissue fresh air since I saw rot peeking out from beneath it. But now you can see in pics below that they literally hit a hard PAUSE on dying and there’s a weird vertical strip where the boot is still green, but thr crownshaft continues to grow and split the dead tissue. What gives? Never seen that before. Usually these would be long dead and ready to be plucked off by now. 

It’s crazy how fast this accelerated and how crappy the situation looks now. They’re continuing to push out spears as fast as ever which is encouraging, but I fear they are approaching a tipping point. These two are among my favorite in my collection so I’d love any advice you can give in getting them straightened out. :) 
 

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Edited by chad2468emr

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Jim in Los Altos

Hmm, I’m trying hard to see a problem with your Archontophoenix but I cant other than it appears green leaves have been cut off. The fronds look healthy. I have groves of theses and have been growing them since the early ‘90s so I’ve seen a few paculiarities with some of them at times but have never lost any. The boots will shed normally if you let the old fronds die rather than cutting them off before they’ve finished their life cycle otherwise the boots will stay green or partially green until they die, lose their green and dry up. 

Edited by Jim in Los Altos
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chad2468emr
17 hours ago, Jim in Los Altos said:

Hmm, I’m trying hard to see a problem with your Archontophoenix but I cant other than it appears green leaves have been cut off. The fronds look healthy. I have groves of theses and have been growing them since the early ‘90s so I’ve seen a few paculiarities with some of them at times but have never lost any. The boots will shed normally if you let the old fronds die rather than cutting them off before they’ve finished their life cycle otherwise the boots will stay green or partially green until they die, lose their green and dry up. 

While it’s far from uncommon for me to spiral and imagine issues where there aren’t any, I guess I should add more detail. Recently new spears have opened up and had areas flat across the spear that were necrotic indicative of fungus having destroyed that tissue when it was in the crown. (Pic attached) For the most part, the palm pushed past it, but shortly after I’d noticed that, all the black stuff in the photos started popping up and then after treating with peroxide it went away but has come back since. Now seeing new dark spots on spears again, and the black stuff is back in full swing. 

And yeah, I’m guilty of cutting some green fronds off. Haha When I got it six months ago there were some ROUGH looking fronds that I needed gone for aesthetic purposes and it’s just about done outgrowing those boots with only two left to shed once these ones are gone. 
 

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Edited by chad2468emr

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JubaeaMan138
19 hours ago, Jim in Los Altos said:

Hmm, I’m trying hard to see a problem with your Archontophoenix but I cant other than it appears green leaves have been cut off. The fronds look healthy. I have groves of theses and have been growing them since the early ‘90s so I’ve seen a few paculiarities with some of them at times but have never lost any. The boots will shed normally if you let the old fronds die rather than cutting them off before they’ve finished their life cycle otherwise the boots will stay green or partially green until they die, lose their green and dry up. 

I completely agree with the above . Looks perfectly fine to me . New growth looks a lot like my maximas right now coming out of winter . Maxima on the left dypsis lutescens maybe haha on the right 

7C2E76EF-D130-4FF5-A455-BC04D651B3A6.jpeg

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BigWaveDav3

I use Southern AG's Thiomyl systemic fungicide as a crown and soil drench when I see fungal evidence. You can also apply it with a sprayer, but I use it by mixing 2-3 Tsp. per gallon of water in a watering can and pouring it over the crown, then any remaining runs down into the root area to be absorbed by the roots. They say you should change fungicides occasionally as they can become resistant to a particular type. I was thinking of getting some copper and Daconil for future needs as non-systemic options.

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chad2468emr
16 hours ago, BigWaveDav3 said:

I use Southern AG's Thiomyl systemic fungicide as a crown and soil drench when I see fungal evidence. You can also apply it with a sprayer, but I use it by mixing 2-3 Tsp. per gallon of water in a watering can and pouring it over the crown, then any remaining runs down into the root area to be absorbed by the roots. They say you should change fungicides occasionally as they can become resistant to a particular type. I was thinking of getting some copper and Daconil for future needs as non-systemic options.

Thanks! Assuming you’ve seen it get rid of issues? Since it’s systemic, will it help continue to curb fungal growth even when overhead irrigation outside of my control continues via my roof dripping? 

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BigWaveDav3

Yes, it helped with my issues and usually only have those problems when we get some decent rainfall followed by foggy cool weather (when things don't get much of a chance to dry out). I would try to find a way to fix the roof dripping with a rain gutter or similar for long term if you can to avoid the cause.

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Steve Mac
On 5/14/2021 at 5:13 AM, Jim in Los Altos said:

I’m trying hard to see a problem

 

On 5/15/2021 at 12:24 AM, JubaeaMan138 said:

Looks perfectly fine to me

 

3 hours ago, BigWaveDav3 said:

fix the roof dripping

Chad, not much to add. Except don't put too much faith in Hydrogen peroxide.

Everyone tries it, it is cheap and easy but I have had death after using it and recovery after spear pull when not using it.

There are different types of fungus and if the fungus is systemic then HP is useless. But if it gets worse, I hope you find out why.

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JubaeaMan138
5 hours ago, Steve Mac said:

 

 

Chad, not much to add. Except don't put too much faith in Hydrogen peroxide.

Everyone tries it, it is cheap and easy but I have had death after using it and recovery after spear pull when not using it.

There are different types of fungus and if the fungus is systemic then HP is useless. But if it gets worse, I hope you find out why.

I was going to say the same thing . Lots of people swear by h2o2 . The only luck I’ve ever had with h2o2 is when preparing seed for germination .

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chad2468emr
10 hours ago, BigWaveDav3 said:

I would try to find a way to fix the roof dripping with a rain gutter or similar for long term if you can to avoid the cause.

It’s a townhome and I don’t have control over what is / isn’t attached to the outside of the building or I’d love to! 

Regarding H202 not working… that’s definitely the first time I’ve heard that around here! Huh. Haha 

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