Plumeria forum→Fungus?

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Alaska! (Zone 4b)
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Floreal
Nov 8, 2019 1:02 AM CST
Uh oh, I'm noticing some distress on the leaves. Spots. Lately I have been struggling with fungus gnats. I've done the hydrogen peroxide drench and neem but maybe I haven't gotten them all. If this is a fungus or bacterial problem, what do I do?
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Alaska! (Zone 4b)
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Floreal
Nov 8, 2019 10:24 AM CST
Also...do fungus gnat larva crawl around on the plant they are infesting? I have been seeing a long, tiny, off white crawling thingy on the plumeria leaves. Not consistently and usually only one. If not a fungus gnat, what else would it be? I only ever see the flying adults and no other bugs on any of my other house plants.
Name: tarev
San Joaquin County, CA (Zone 9b)
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tarev
Nov 8, 2019 12:58 PM CST
I am thinking maybe your plant is starting to get ready to go dormant. If you do have fungus gnats, then your media is staying too wet. At this time of the year, I start scaling down watering already, due to the decreased natural light and changing temps.
Alaska! (Zone 4b)
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Floreal
Nov 8, 2019 1:48 PM CST
It is still quite actively growing, it has not stopped putting out leaves since I got it two months ago. How does a plumeria know to go dormant inside with steady temps? My humidity is the only thing lowering, which I don't currently try to alter.

I do let it get completely dry between watering. I have been noticing the adult fungus gnats flying around and when I go to check the moisture I disturb them and they fly out of the medium. One thing I did when I first got this plumeria was repot with and fungus additive, great white. Would that attract the gnats? The roots have exploded, up and everywhere, I wanted to repot because it looks to be over crowded now because of this.
Name: tarev
San Joaquin County, CA (Zone 9b)
Stay Home-Save Lives-Wear a Mask!
Cat Lover Houseplants Plays in the sandbox Region: California Orchids Plant Lover: Loves 'em all!
Composter Cactus and Succulents Dragonflies Hummingbirder Amaryllis Container Gardener
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tarev
Nov 8, 2019 5:40 PM CST
Well they also feel the light levels. Even indoors, natural light levels coming in decrease as seasons change. And temperatures overall always fluctuate too when cold weather/winter is here. Unless you can honestly say your indoor temps firmly stays 80F all day long and throughout the cold season, then you may be able to sustain its growth even in the cold season.

Plumerias are quite sensitive to light and temperature changes. So eventually they do go dormant.

I do not know what that fungus additive you mentioned. I only use cacti mix and lots of pumice to my Plumerias and they thrive quite well. During the hotter months when our temps soar to 90F to 100F then I have to water practically everyday. But once we enter Fall and temps overnight starts hitting below 50F I have to scale down watering gradually. Otherwise it is easy to rot the base of the plant.

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