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03-21-2015, 03:28 PM
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Jr. Member
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Join Date: Mar 2015
Posts: 4
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Dusty white residue on Cymbidium foliage
Hello everyone!
I have noticed some dusty/flaky spots on the foliage of my Cymbidium. I have no idea what they are called.
Those residues are superficial for the most part, meaning that they can be wiped off with a wet rag. They tend to leave a discoloration on the foliage if they are wiped after being there for a while but overall they just wipe off.
It has spread quite a lot now and I need your expertise in order to address a treatment!
Thank you in advance for your help
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03-21-2015, 03:31 PM
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Senior Member
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Join Date: May 2005
Location: Oak Island NC
Posts: 15,205
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That's not a residue, it is mealy bugs.
You need an insecticide, NOW
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03-21-2015, 03:33 PM
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Jr. Member
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Join Date: Mar 2015
Posts: 4
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Thank you Ray for your insight!
Do you recommend an insecticide in particular?
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03-23-2015, 11:17 AM
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Jr. Member
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Join Date: Mar 2015
Zone: 9b
Age: 25
Posts: 17
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Or you can use a mixture of rubbing alcohol, garlic, and cinnamon +chili pepper juice and use a Q-tip to smother each individual one.
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03-23-2015, 05:07 PM
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Senior Member
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Join Date: Jul 2008
Zone: 9b
Location: Northern California
Posts: 1,844
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I agree that you need an insecticide now, but I believe you have scale, not mealy bug. Mealies generally do not manifest themselves that way on cymbidiums but scale certainly does.
I use Bayer 3 and 1 systemic miticide/all purpose spray. Take the plant outside and spray it there as per instructions. When one has a very large collection as I do, "green" remedies simply do not work. Your choice but in my collection, an alcohol/cinnamon/garlic juice and chili pepper "rub" on an entire cymbidium plant would be a waste of time and would need multiple repeated treatments. Just another opinion.
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03-24-2015, 04:46 PM
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Jr. Member
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Join Date: Mar 2015
Posts: 4
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Thank you all for your advice.
After looking at pictures online, I do think too that they are scale bugs rather than mealy bugs.
I have wiped the leaves clean of bugs as much as possible using the homemade remedy recipe provided by JMN16150 and sprayed the plant with the Bayer 3 in 1 miticide. Hopefully, my Cymbidium recovers from the infestation!
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03-24-2015, 05:07 PM
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Jr. Member
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Join Date: Mar 2015
Zone: 9b
Age: 25
Posts: 17
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Just make sure to keep your plant away from pollinators when it decides to bloom as Bayer Rose and Care cause the plant to create poisonous pollen; bad for bees and butterflies
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03-24-2015, 05:34 PM
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Jr. Member
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Join Date: Mar 2015
Posts: 4
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Good to know! It is an indoor plant only. I have sprayed it in the laundry room sink.
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03-29-2015, 01:38 AM
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Senior Member
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Join Date: Mar 2013
Location: Chapel Hill, North Carolina
Posts: 100
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my guess is boisduval scale.
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03-29-2015, 02:13 AM
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Senior Member
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Join Date: Aug 2013
Zone: 7b
Location: Raleigh, NC
Posts: 1,197
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I think the important information has already been relayed, all good answers.
If you decide to go with the cinnamon oil / extract option, which works in my experience, I have a word of caution.
I'm pretty sure it's safe to use on cymbidiums, but test a small patch first, and if there's no leaf damage after a day or so, you're good to go. But be careful spraying it on other plants.
I'm saying this with the voice of experience, not all plants can handle cinnamon spray. I know that many Tillansias (bromeliads) and Mimosas, as well as other soft leaved plants will burn very easily, even from a light over spray.
I found this out the hard way. Cinnamon works, and works well, but you need to be selective with it.
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