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Thread: Plant MD's - what ails my nep?

  1. #9
    BigBella's Avatar
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    Quote Originally Posted by MrFlyTrap2 View Post
    Watch them closely, it might be a sign of mite damage or some other insect. One of my neps started doing that, quickly spreading to others. Eventually even new growth had the same pattern. The mites were not visible, but the effects were. I applied a mixture of bayer advanced complete insect dust with water. After doing that, all the neps began to grow normally without the red splotches.
    Oh, I must have misread something. I didn't realize that new growth had also been affected. I would then have to agree with Mr. Flytrap2 that pests are involved. Some time ago, I had a serious aphid infestation right out of ther blue, affecting Sarracenia, Dionaea, and, I am sure, a couple of my Nepenthes (even though aphids are supposedly rarely associated with those tropicals).

    I nuked everything with Ortho Orthenex, a systemic pesticide, and that did the trick . . .
    “Sì perché l'autorità dell'opinione di mille nelle scienze non val per una scintilla di ragione di un solo . . ."

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    SirKristoff's Avatar
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    As i just posted in another thread, id use Ortho Orthenex, it is a systemic disease and pest control spray, i use it on my outside neps with no ill effect, same with my sarrs and dionaea

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    Lover of Mountains nightsky's Avatar
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    Just did some additional checking with a bright light and magnifying lens. Not one sign of mites. Also, once again I tapped each leaf with paper underneath, and not one speck landed on the paper - so I'm actually thinking in my case it's not mites.

    So - I'm leaning towards leaf burn (which has me stumped - they've been under those lights for 6+ months, not sure why it would show up now). Are there fungus afflictions which look like this? Could it be heat related? It get to about 78F at the plants height, which seems fine to me. Those of you who have seen this on your plants - did they recover?

    PS - if you look in the background on the first pic, you'll see algae in the pot. I do fertilize twice a month at 1/4 strength and flush between. So, is algae detrimental enough for me to try to eliminate?

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    Jimmy's Avatar
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    Yes - leaf burn is related to heat, so it would make sense that your plant is showing symptoms only now, when it's hot in the summertime. 78 seems fine to me too, but it is a highlander, so that could explain it. I'm currently unaware of any fungus attacks that look like what your plant is experiencing, either. And no, algae should not be detrimental, and you shouldn't worry about it.

    Your plant should recover, whether it gets completely used to the light+heat, or it may wait until the temperatures go down.

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    Lover of Mountains nightsky's Avatar
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    Well, I found the culprit, finally tonight. I saw just a few, maybe 5, small white dots on the underside of one of the leaves. They literally were the size of the period at the end of this sentence. I wasn't sure if they were just specks of dust or a parasite. I tried looking at them with a magnifying glass - no good, to small. So I took a macro photo, and zoomed in on that shot. Still not clear. I gave everyone of my other neps a good inspection. On my mul x lowii, I found similar specks. Barely visible white spots, but more of them, and they tended to congregate on the newest unfurling leaf, which is quite deformed. I'd upload a photo, but they were so darn small even with macro I couldn't tell what they were.

    I'm suspecting a few things. Mealybugs, white flies, or some kind of aphid. Didn't look like spider mites as they are white. I didn't see any of the classic mealy bug fuzz, but I didn't see many critters to begin with, so maybe the colony is just starting. I'm kind of stumped to be honest, these critters are small! But they are doing quite a bit of damage. Oh well, I drenched all my neps in Neem oil for now, I'm going to try and track down a systemic tomorrow and try to get this under control.

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    Cardiac Nurse JB_OrchidGuy's Avatar
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    The only thing is you need to make sure you get the bayer advances for mites. There is one with Merit in it and Merit is NOT for mites! It is not a mitacide and can make the problem worse. I have heard merit called viagra for mites. Read the label of the stuff you get and make sure it says for mites too.

    Honestly to me the plant looks fine. It is growing the smaller leaves because your growing it in stronger light than it once was in. It doesn't need to make the long green leaves to get all the energy it needs now. The older leaves are getting sunburned from the intense light.

    How long have you had it? Has the conditions changed?

    meally bugs are a good size and can been seen. And someone else was right. Leaf burn is caused by heat and not by the light itself. If you could keep the leaves cool the plant can take as much light as you can give it. The bulbs cause heat and it just got too much for the older leaves who were not used to it. The newer leaves are more adapted to the heat and therefor look better.
    JB
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    Sure looks like pest damage to me. It has nothing to do with the lights or burn or anything of the sort. I am betting the underside of the lower leaves are all brown from the critters sucking the leaves dry.. to the point you see the damage coming through on the upper surface with the colapsed cells. You will probably see some brown discoloration on the higher up leaves on the underside as well.
    Is that a Nepenthes in your pocket or you just happy to see me?

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    Lover of Mountains nightsky's Avatar
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    Quote Originally Posted by Tony Paroubek View Post
    Sure looks like pest damage to me. It has nothing to do with the lights or burn or anything of the sort. I am betting the underside of the lower leaves are all brown from the critters sucking the leaves dry.. to the point you see the damage coming through on the upper surface with the colapsed cells. You will probably see some brown discoloration on the higher up leaves on the underside as well.
    Exactly what's happening. The new leaves are in fact just starting show the discolouration on the undersides.

    On the bright side, since 'neeming' them lasts night, I haven't seen the white dots. But to be safe I'm going to track down a systemic.

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