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Scale problem

This is a discussion on Scale problem within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; My friend and I bought a large group of Catt and the alliance plants from ...

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  1. #1
    Daethen is offline Senior Member
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    Default Scale problem

    My friend and I bought a large group of Catt and the alliance plants from someone cutting down their collection. The plants were in very rough shape when they arrived.

    We removed all the old medium. We soaked them in thrive for about 20 minutes. We also soaked them in Malathion for 5 to 10 minutes completely submerged. They were then potted in new presoaked medium in brand new pots. This was about a month ago. They have been perking up nicely and show some good new root growth.

    Today, I was going to take some of them back to my home and noticed what I think is scale on them. They were small round and flat. They flicked of really easy with a finger nail. I am wondering if this is a new infestation or if they may just be old ones that were killed when they were first dipped and are just now starting to come loose. I'm sorry, I do not have a picture.

    Should I just go ahead and retreat with Malathion? Is there a better solution? How often should they be treated? And, no I didn't bring any home to my collection. Will have to wait until I am sure they are scale free. There are over 40 of them!

  2. #2
    Tmai's Avatar
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    Jonada, it might be old dead scale, but it may also be new scale growing again from what the malathion may have missed. I would keep them separate for a while and watch, and I would dose them again with malathion. Just my opinion; there may be others here with better advice. Scale is a bear to eradicate. Good luck!

  3. #3
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    Quote Originally Posted by Tmai View Post
    Jonada, it might be old dead scale, but it may also be new scale growing again from what the malathion may have missed. I would keep them separate for a while and watch, and I would dose them again with malathion. Just my opinion; there may be others here with better advice. Scale is a bear to eradicate. Good luck!
    Keep them separate and retreat. Also get a systemic and treat with that too. Do NOT let scale get a foothold in your collection. Take it from me - it is horrible. Take no prisoners!

    Cheers,
    BD

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    I concur with BD. Take no prisoners. Another treatment with Malathion should do the trick.

  5. #5
    Daethen is offline Senior Member
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    Will do. I think that we are going to go over them with alcohol to make all th e visible ones disappear then we will retreat them and keep an eye on them for a while before I bring any home. Luckily she has these upstairs in her home and completely separate from the rest of hers downstairs. How worried do I need to be about the area they are in? They have only been there a month or so and it is all coated metal shelving.

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    Quote Originally Posted by Daethen View Post
    Will do. I think that we are going to go over them with alcohol to make all th e visible ones disappear then we will retreat them and keep an eye on them for a while before I bring any home. Luckily she has these upstairs in her home and completely separate from the rest of hers downstairs. How worried do I need to be about the area they are in? They have only been there a month or so and it is all coated metal shelving.
    Should be fine, Jonada. I would treat her downstairs collection to be safe though. Preventive care is a good precaution since they have occupied the same enclosed space for a month. Being separate is probably enough, but better to be sure.

    Cheers,
    BD

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    Daethen is offline Senior Member
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    Bruce, do you think it would be ok for me to bring some of them to my place after treatment? I don't have the ability to keep them separate from the rest of my babies.

  8. #8
    Brutal_Dreamer's Avatar
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    Quote Originally Posted by Daethen View Post
    Bruce, do you think it would be ok for me to bring some of them to my place after treatment? I don't have the ability to keep them separate from the rest of my babies.
    Sure, after treatment, no problem. You will still want to treat again in about 7-10 days as a final precaution, but all is probably fine. Make sure you cleaned them good - all the way down to the rhizome. Scale likes to hide in the dry sheaths and down at the base of the plant on the rhizome. I have lost too many orchids to scale, so I am probably over reactive, but do not let it get into your collection. It is a major headache.

    Cheers,
    BD

  9. #9
    Daethen is offline Senior Member
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    Thanks for the info, Bruce. I don't want any more headaches then I have already had with my collection if they can be avoided. I know you are speaking from experience!

  10. #10
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    I have gotten good results with spraying with oil and dishwashing detergent here in Florida, I would think it would also work well in Wisconsin. I don't use the oil during our summer months. Three tablespoons of cooking oil per gallon of water, then 7-10 days later 2 oz of dishwashing detergent, I do this about every 2-3 months as a preventative measure and have not had any problems in several years.

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