Is this scale on my gardenia?

mudrnner(zone 4/5 NY)March 26, 2008


I have a question about my gardenia plant. The plant itself looks very healthy and has been filling in nicely lately. I have had some problems with spider mites, but have washed the plant as soon as I see their webs. What I am seeing now is small white patches on the stems, nothing on the leaves. Could it be scale or is it just the stem becoming woody? It looks like "plant dandruff" and seems to be able to be rubbed off, but appears again later.


P.S. How do I attach pictures to show this? Not very computer savy.

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puglvr1(9b central FL)

I'm not that familiar with a lot of the insects and diseases that plague gardenias. Mine had mealies/aphids before. But could it be "Powdery Mildew"? Here's a link from Wikipedia with pics, you can see if it looks like what yours has.

Maybe someone else with more knowledge will answer.

Good luck

Here is a link that might be useful: Powdery Mildew

    Bookmark   March 26, 2008 at 7:05PM
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mudrnner(zone 4/5 NY)

Thanks for the link, but it isn't powdery mildew. I have a couple of pictures that I took, but I can't get them to attach here, otherwise I could show you.

    Bookmark   March 27, 2008 at 4:32PM
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Mudrner, w/o a pic it's hard to tell..I'm guessing either mealy or white scale..mealy is more common with Gardenias, but it could be either insect.
Scale resembles lumps/bumps on a leaf/stem. Some are hard shelled, others soft.
Mealybug reminds me of patches of cotton.
To test for scale..Scrape..scale can be removed using a fingernail. They're semi-round, and detach as one piece.
I use Fish Emulsion to rid scale by spraying entire plant..Mealy's are a pain in the, you know what. I haven't come up with a home-made remedy to rid them.
Ppl on the Hoya forum swear crushed, Scented Geranium leaves keep Mealy away from a plant..
In the meantime, try figuring out which type of pest it is.
If it were my plant, and I suspected Mealy, I'd swipe areas w/a cotton ball or Q-Tip dipped in Rubbing Alcohol..Then, take plant to the sink/shower, add soap, rub into leaves/stems/branches, and hose off..

BTW, do the bugs move around, fly, seem immobile? Toni

    Bookmark   March 27, 2008 at 11:50PM
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mudrnner(zone 4/5 NY)

Thanks Toni,

I see no movement at all and no sign of flying bugs. I did scrape off one bit and it was hard and flaky. I am beginning to think it is not scale. I have used a magnifying glass to really see it well and it is just white patches, irregular... like dry skin! I'll keep watching it and maybe try the fish emulsion.


    Bookmark   March 28, 2008 at 7:53AM
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rhizo_1 (North AL) zone 7

Can you email me the images?

    Bookmark   March 28, 2008 at 1:39PM
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