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virused plants

This is a discussion on virused plants within the General Orchid Culture forums, part of the Orchid Culture category; I have recently seen pictures of plants that tested positive for a virus. I now ...

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  1. #1
    sterling is offline Junior Member
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    Default virused plants

    I have recently seen pictures of plants that tested positive for a virus.

    I now notice, that I have a plant that I purchased a year ago, with the same markings.

    I did isolate this plant for about 6 months as it also came with a lot of leaf spotting and I cut it back severly before the leaves stopped rotting.

    Now, I wonder if I have infected my other orchids with a virus from this plant, and even if I did, I'm not inclined to toss the whole lot...

    Any opinions?

    Sterling

  2. #2
    dosal is offline Member
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    Default

    Did you use the same cuttig tool on your other orchids without flaming your tool first? If the first plant really is virused then you have spread the disease. You really can't tell whether a plant is virused by looking at it. Wait for it to flower. If the flowers are steaked then you can be fairly sure, even though borthritis also causes streaking in flowers. Have the plant tested. It only costs around $ 4.00.

  3. #3
    sterling is offline Junior Member
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    Default how virus spreads?

    No, I have not touched or cut this plant then cut another, but...I read that virus' spread naturally downward and don't have to touch another plant, etc.

    So if you have a virused plant on a top shelf, the virus can spread naturally, just from common water? I did have this plant on a top shelf and probably at some time this summer, water spilled down to the lower shelves after touching it.


    Sterling

  4. #4
    Jmoney's Avatar
    Jmoney is offline Senior Member
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    It can spread by water, but it would have to be if you watered a healthy plant with water that had been used on a virused plant. It can also spread via various biting/sucking insects making their rounds on the foliage. But I think the easiest way to spread it is using nonsterile cutting tools, for obvious reasons.

  5. #5
    dosal is offline Member
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    If water spilled out of the virused pot on to another healthy plant, there is a chance the virus might have spread. Just by leaves touching you will not spread virus. I have just recently read that if roots are growing out of the pot and touching one another this might transfer virus, other than that what Jason said.

  6. #6
    LJA's Avatar
    LJA
    LJA is offline OrchidTalk Tech Admin
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    Markings from various diseases can take similar forms--you won't be able to confirm a virus infection without testing, so that's the route you'll have to go if you're really concerned.

  7. #7
    Jmoney's Avatar
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    viruses can also exert no signs at all, especially if the plant itself is healthy.

  8. #8
    orchidaddict789's Avatar
    orchidaddict789 is offline Senior Member
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    Sometimes it's hard to distinguish whether the orchid has a virus or not (without lab testing, of course). Nutrient deficiencies, bacterial/fungal diseases, etc., may make markings similar to that of a virus. This may be confusing. Once I looked up a picture of a virus on the web, showing a leaf with yellow spots and black stuff, forming a sort of "spotting" pattern. Well, my onc had similar spots on its leaves too. I was freaked out! Later I found out that it may have been scale (or other bug) damage and dirt on the leaves. What relieved me the most was the fact that there were no more new spots on the leaves, and the new growths were perfectly spotless. Just to share something interesting...

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