Guttata

N.Hamata having spots on leaves

14 posts in this topic

Hi everyone,
 
I have a hamata clone 1 (from wistuba) for less than a year in highland tank (Peltier cooling http://www.forumcarnivore.org/viewtopic.php?t=26542)
- day : 20/25 celsius degrees
- night : 7/12 celsius degrees
- hygro : 90/100%
-2 * 50W grow led
 
Hamata was growing very well after arrival for months until spots appeared on leaves. These leaves with traps died.
 
New healthy leaves were produce but they currently having spots, Again !!!
 
098957e1024c903cb647935806238c0b.jpg
35ef47ec16d611dac7827d5b7bcae816.jpg
5a6dccfc4c16db6cae8df14a0fccc289.jpg
 
= brumisation + light ?
= cold water (5 celsius degrees minimum) brumisation ?
= fungus attack ?
 
Other neps are fine.
 
Thanks for your help.
 
 
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It really looks like fungal damage to me, but I'm not sure of what species...

 

¿Isn't 5-7 Celsius (41~45 fahrenheit) too low for a non-ultra highland? My two clones have 16-18c (60~64f) nights and are growing quite fast.

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Hi Whitefox,

Thanks for your reply. I set the temperature around 11 degrees now. I have other nepenthes in the tank : inermis, dubia , glabrata, lowii, Flavia, jacquelinae, talangensis,..., and few heliam.

I bought this for treatment :
http://www.bayer-jardin.com/Products/m/Maladies-Rosiers--Pret--lemploi

I searched for mycrobutanil but impossible to find it. Maybe the molecule has been forbidden.

I also stop the brumisation with the cold water.

Any other opinion / Advice ?

Thanks


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Hi,

After few more researches i think i found the guilty fungus : cercospora.

 

Few topics :

https://www.terraforums.com/forums/tropical-pitcher-plants-nepenthes-/139058-damage-cold-disease-otherwise.html

 

https://www.terraforums.com/forums/tropical-pitcher-plants-nepenthes-/136702-treating-nepenthes-leaf-rust.html

 

https://www.michigansugar.com/wp-content/uploads/2015/07/Management-Guidelines-for-Controlling-Cercospora-Leafspot-in-Sugarbeets-2015.pdf

 

Treatment + stopping brumisation (no more water on leaves for hours during nights) may help solving the problem.

 

 

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Hi there,
Again and again... the healthy leaves are now infected.

f838c6a6b4051e417a7277436cb8baad.jpg

Any help please ?



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Nop impossible. No sun, only artificial light. I moved the led to give shade to the hamata


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Sorry to see what your plants are going through. I'll give you a more lengthy reponse. Cercispora is unlikely to be the problem. While I see some in that picture, that fungus is literally everywhere. Just about every plant that is vulnerable to it in the world is infected with it, but it is generally not a major problem. Healthy plants live with it, and only see blooms of it when something else, usually environmental, is wrong. Looking at the picture, it does look like some old sunburn is there on the older growth, or if this is a sudden change, I would wonder if the roots are compromised, and you are seeing leaf dieback as a result.


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LED can really burn leaves, it happened to me before with red and blue lamps when used too close, but it didn't look like that. They were reddish with some brown and dried zones.

 

It's me or the new circles have a black spot in the middle?

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Looks like dead chloroplasts from the LED lighting.  The temperatures were way to cold as well.

Edited by manders

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Hi,

Thanks for the help.
Minimum night temperature is now 13,5 degrees.
I put a bag on it also yesterday.

I will move the plant to a shady place in the terra.


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Perhaps the water dropplets over the leaf worked as a lens an that is why the damage is so scattered? At least the new one on the top seems clean.

 

Edited by Whitefox

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I think another problem is the humidity! 90-100% ist just too much.

Most highland Neps love 60-80% in the day and around 90 in the night. Is there any way for you to change the hymidity?

I do not think that lighting causes the damage. Hamata turns red very very easily. Before the light would cause dying leafs and brown spots the leafs would turn red.

My adavice: Reduce humidity and don't let the night temperature drop too far below 10°.

Maybe even get them a bit more light. The pitchers are not fully colored up.

 

Niklas

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Hi,

 

Thanks all for your help.

 

I gave the hamata some shade because effictively he used to have coloured pitchers but also red leaves !

 

43a4b0a4eb9b093d8b8afa680e60bc79.jpg

 

To quickly gain in temperature and reduce a bit the hygro I just add a silicon heater pad with a fan.

 

 

All the other nepenthes are doing well :

Exemple with dubia, inermis, Talangensis, Flava :

53193cec04474acff1c32d1edb3bba3b.jpg

 

So to remember for hamata :

* avoid direct strong light

* keep night temperature around 13celsius

* no water droplet on leaves during hours

 

 

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