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Possible Diseases in Paphiopedilum

Discussion in 'Issues, Disease and Pests' started by Sheercold27, Feb 14, 2017.

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  1. Feb 14, 2017 #1
    Sheercold27

    Sheercold27 New Member

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    IMG_4598.JPG IMG_4595.JPG IMG_4596.JPG I recently purchased two paphiopedilum (Niveum and Leucochilum). I am not at all experienced with orchids but I have done a lot of reasearch, and I believe they may have sicknesses. I'm not certain and would like someone more experienced to make a proper diagnosis and tell me what I should do. The included photos are the orchids in question.
     
  2. Feb 14, 2017 #2
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    If they aren't something of exceptional value that you couldn't get somewhere else, I would definitely talk to the vendor and ask for a refund. It could be boisduval scale. Maybe mealybug, but I can't really tell. Either way, if you are going to keep them you would want to treat them with an insecticide. Preferably a systemic such as Safari or Merit. Several applications 10 days apart. Anyone else have thoughts?
     
  3. Feb 14, 2017 #3
    naoki

    naoki Well-Known Member

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    Are you talking about the right edge (near the bottom) of the left leaf on the first photo, Marni? It could be just physical damage, with thick leaf Brachypetalum, I have seen the leaf skin (epidermis) shows delimitation after physical damage, which might look like this. With the second photo, if it is spreading, you should do something. It might be already contained. With the third photo, I don't know which aspect is bothering you. I've had hard time growing P. niveum, I'm guessing that they prefer fairly warm condition, which I can't provide.
     
  4. Feb 14, 2017 #4
    Sheercold27

    Sheercold27 New Member

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    I'm worried about the blackening around the base. I'm not sure if that could be the beginnings of black rot.
     
  5. Feb 14, 2017 #5
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I was talking about the white fuzz at the base of the plant and on the medium. Maybe it is just mold and I can't see it clearly enough.
     
  6. Feb 15, 2017 #6
    Bonino Elio

    Bonino Elio Well-Known Member

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    by the images I see signs of mealybug, but treatment can wards off all risk, excellent product is the Movento 48 sc (Bayer), an insecticide with double sistemia;

    What I care about are the stains image 2:03, I suspect a collar rot, treatable with Previcur Energy (Bayer), a sistemia ascending and descending fungicide.
     
  7. Feb 15, 2017 #7
    naoki

    naoki Well-Known Member

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    Oh, I see what you are seeing in the 2nd photo when I blow it up. It is difficult to tell, but it looks like perlite, fungi or something else.