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Apr 21, 2018 9:43 AM CST
|I let these things go for a while, thinking they were nymphs of aphids or mites because I was having success with Neem (watering, not spraying) and I know Neem attacks certain parts of the life cycle. Then I sprayed them with insecticidal soap, which may have done the job, but I see they are showing up on new plants. One of the photos is of an apparent graveyard. I wish I knew what killed them. Eventually half the leaves on the worst infested hibiscus fell off.
They look like dust on the leaves. Very pale brown. Individuals are smaller than a grain of salt. I think they can fly, as I see one in the air every now and then, but it may just be floating on an air current.
Does this ring any bells?
Name: Will Creed
Prof. plant consultant & educator
Apr 27, 2018 9:51 AM CST
|You have a very serious infestation of Whiteflies. They often come in with Hibiscus. Unless you are seriously attached to the Hibiscus, I suggest that you discard it.
The neem is as effective as anything. However, you have to spray all of the affected plants until all leaf and stem surfaces are dripping wet and repeat again each week for a month. This is a very messy task and you may want to consider discarding some of the plants. Also be sure to spray and wipe away all carcasses on household surfaces. If you miss a few of these critters, they will reproduce and the infestation will return.
Horticultural Help, NYC
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Nov 28, 2020 5:14 AM CST
|I had a similar problem and unfortunately, I couldn't save my plants. If you managed to find a solution, please tell me how you did it. In addition, my husband's workshop is located next to my greenhouse. He is a carpenter, and he works with wood, so shavings, sawdust, and construction dust are everywhere. All this dust also ends up on plants and this is a huge trouble for me. So I'm looking for a powerful dust collector to fix this. Do you think this will work? I really want to protect my plants from this dust. There are reviews of dust collectors on mitersawjudge.com, and I think this is the best way to protect my plants from dust. By the way, I heard that it is also harmful to health, so I can protect not only the plants but also my husband.|
Foothills of the Italian Alps
Nov 28, 2020 5:43 AM CST
|For what's worth I've had good luck eliminating whiteflies with a combination of imidacloprid (used as a drench) and mineral oil.
I'll take the seeds from Colombia and Mexico, I'll just plant 'em in the hollers down Copperhead Road.
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