White fungus on chambeyronia macrocarpa

[Plantking165]

So this week I've noticed a fast acting white spot that has been spreading on my chambeyronia and with it the leaf has been drying up quickly starts at the tips the leaf was healthy and green not to long ago. The palm has been quite dry recently idk if that will come into play but here are the pics anyone know what's happening here?

[EPaul]

You may have several issues here.  Can you post a photo of the entire palm as well?  Lots of knowledgeable and helpful people here will be able to give you better solutions the more information and pics you provide.  Just based off the closeup, it could be mealybugs or powdery mildew.  Neem oil may solve both - or use a systemic pesticide with fungicide foliar spray like copper.

[Kim]

Check the underside of the leaves as well, possible spider mite infestation?

[Plantking165]

2 hours ago, EPaul said:

You may have several issues here.  Can you post a photo of the entire palm as well?  Lots of knowledgeable and helpful people here will be able to give you better solutions the more information and pics you provide.  Just based off the closeup, it could be mealybugs or powdery mildew.  Neem oil may solve both - or use a systemic pesticide with fungicide foliar spray like copper.

Well here are some more pics its also got a patch on the royal palm and its not pest I think it'd the strands of tbe fungus underneath the leaf. The oldest leaf is dry and dead pretty much. You can also see it forming near the middle if the leaf where the petiole goes through.

[Fishinsteeg234]

Is the palm getting enough sunlight that close to the side of the house, or is it in full shade? I have a few this same size, in dappled sun under oak canopy. I would move it to a dappled light position with filtered UV rays and that fungus might be resolved. The brown leaf can be cut off to prevent further spread. Just my 2 cents. Good luck. 

[EPaul]

I'd give it a good spray with Neem Oil (top and bottom of leaf) and see if that solves your problem.  You can always reapply after two weeks.  I also agree with @Fishinsteeg234 on moving it into more sun, but not full sun.  I purchased two larger specimens of Flamethrower about a year ago that were in full shade and moved them into part sun and they look 10x better than what they did at the nursery.  From my experience though, they will need to receive more rounds of fertilization when in part to full sun to prevent yellowing.

Edited June 2, 2022 by EPaul

[Plantking165]

17 hours ago, EPaul said:

11 minutes ago, EPaul said:

I'd give it a good spray with Neem Oil (top and bottom of leaf) and see if that solves your problem.  You can always reapply after two weeks.  I also agree with @Fishinsteeg234 on moving it into more sun, but not full sun.  I purchased two larger specimens of Flamethrower about a year ago that were in full shade and moved them into part sun and they look 10x better than what they did at the nursery.  From my experience though, they will need to receive more rounds of fertilization when in part to full sun to prevent yellowing.

 

Alright ill move it to more sun it was just in morning sun. But I have been keeping it pretty dry over the last weeks could a lack of water be causing what I'm seeing because this morning it's progressed more and I'm not sure what it looks like now but it's different. Especially on the one side ots now brown instead of whitish.

[EPaul]

Just be careful with Neem Oil, you don't want to overdose if it's a concentrated solution as it can cause leaf burn.  You might want to buy the premixed spray bottle to be safe if you're not confident.  And yes, Chambeyronia macrocarpa like moist, well-draining soil.  The older, bottom leaf should just be trimmed off in my opinion.  

[PalmatierMeg]

Don't overwater. Looks a bit like damping off.

[Plantking165]

1 hour ago, PalmatierMeg said:

Don't overwater. Looks a bit like damping off.

I think I can rule that out as I've kept it dry as in no water for Over 2 weeks I just watered it yesterday 

[Plantking165]

And I'm worried because this is acting fast and if it's a disease I really don't want it to be because I just got 2 coconut palms a Fiji dwarf and red spicata and I don't want that on them because I can't consistently treat a massive coconut palm for that. 

[Htown Palms]

I am no expert, but I fought something similar to your palms ailment all winter. Whatever it was was strong, very contagious,  and moved fast. I lost a lot of palms to it. It wasn't until I cut off all the diseased parts of the plant and treated weekly with fungicides that it finally went away. The key thing being cutting off ALL unhealthy leaves and treating the rest. Continue to do very limited watering as well. My wife and I did a lot of research and narrowed it down to either a fungal infection or bacteria infection. We finally got it under control and havent seen any new infections in about two months. Good luck. 

Edited June 3, 2022 by Htown Palms