Carnivorous Plants forum→Treating Red Spider Mites on Nepenthes

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Name: TK
Ontario, Canada (Zone 6b)
Cactus and Succulents Sempervivums Adeniums Bromeliad Tropicals Aroids
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Macrocentra
Mar 15, 2021 12:34 PM CST
What's the safest way to treat for spider mites on Nepenthes? I have two Nepenthes sanguinea that recently started having their leaves turn spotty, and I found little red dots that look like spider mites, and what looks like tiny bubbles on them (not sure if this is eggs, or secretions from the plants).

Is insecticidal soap and/or diluted alcohol safe to spray on Nepenthes?

Edit: Seeing some mixed opinions on insecticidal soap. So for now, I used cotton swabs and isopropyl alcohol to wipe all of the leaves. I didn't spray the entire plants though. Just carefully wiped them down.
[Last edited by Macrocentra - Mar 15, 2021 4:51 PM (+)]
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Name: Steve
SE PA (Zone 7a)
Cat Lover Garden Photography Cactus and Succulents Bromeliad
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elgecko
Mar 16, 2021 7:40 AM CST
I've sprayed full strength 70% rubbing alcohol on my Nnepenthes without any ill effects.
Side note: sprayed it an just about any plant without issue... DO KEEP AWAY FROM Drosera! Leaves will dry and curl.
Name: TK
Ontario, Canada (Zone 6b)
Cactus and Succulents Sempervivums Adeniums Bromeliad Tropicals Aroids
Hibiscus Sedums Container Gardener
Image
Macrocentra
Mar 16, 2021 9:02 AM CST
Okay, noted!
I have some other Nepenthes not too far from where those two were, so I'm going to treat those as well as a precaution.

Having some trouble with my phone camera, but I'll get one of my Nikons out later to grab some photos. The blotches on the leaves are kind of rusty colored and I'm not entirely sure if it's from the mites, or if I have another problem. Hoping there isn't a fungal problem as well... I haven't had to deal with that before.
These two particular plants have done wonderfully for me the entire time I've had them. This is the first real problem. I originally thought the blotches were a color change with the recent increase in sun exposure with spring finally coming, but I'm not entirely sure.
Is it common for mites to cause rust colored spots on Nepenthes? The spots are only on the undersides of the leaves.
Name: TK
Ontario, Canada (Zone 6b)
Cactus and Succulents Sempervivums Adeniums Bromeliad Tropicals Aroids
Hibiscus Sedums Container Gardener
Image
Macrocentra
Mar 16, 2021 10:23 AM CST
Here we are. Got some photos.

Thumb of 2021-03-16/Macrocentra/2768b0
Thumb of 2021-03-16/Macrocentra/17db87
Thumb of 2021-03-16/Macrocentra/4abebe

I wiped away all the mites I found with the cotton swabs and alcohol. I didn't see any webbing. Just the tiny mites in areas. But I can't tell if this is a rust fungus, mite damage, something else? The damage happened fairly quick though.

The spots don't feel fuzzy at all. My q-tips had red residue on them, but I assumed that was the mites I was wiping off. I'd get the red residue running them over the top sides of the leaves as well, where they're still green.

They're both in the same pots they originally came in when I got them around a year ago. I only give them distilled water. They've also been in the same window ever since. It did get sunnier the last few days, but they weren't in direct sun very long, so I don't think they burned. (Also, the undersides were facing away from the window).
[Last edited by Macrocentra - Mar 16, 2021 10:26 AM (+)]
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Name: Tommy
Hudson Valley of N.Y.
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tommyr
Mar 18, 2021 9:32 AM CST
Watch this video: https://www.youtube.com/watch?...
Name: TK
Ontario, Canada (Zone 6b)
Cactus and Succulents Sempervivums Adeniums Bromeliad Tropicals Aroids
Hibiscus Sedums Container Gardener
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Macrocentra
Mar 20, 2021 10:34 AM CST
Thanks. That clarified the reasoning for the mixed information about the insecticidal soaps. Definitely won't be using soaps on any of my carnivores.

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