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-   Pests & Diseases (http://www.orchidboard.com/community/pests-and-diseases/)
-   -   Dendrobium with black and yellow spots (http://www.orchidboard.com/community/pests-and-diseases/91933-dendrobium-black-yellow-spots.html)

estación seca 10-17-2016 01:07 PM

If spreading, I would cut off the leaves with those black spots. Cut far below the lowest black area. Maybe even cut all the way back to the stem. Sanitize your tool with a 10% bleach solution between cuts.

NKOrchid 10-17-2016 01:23 PM

Well, the issue is that it's on a lot of the leaves and some places it has spread from the leaf down the cane. So... am I supposed to remove then entire cane then?
I've taken pictures so I can compare and hopefully determine whether or not it's actually spreading.

estación seca 10-17-2016 01:44 PM

Is there a university near you with an agricultural department? They might be able to help identify the problem.

Dollythehun 10-17-2016 02:43 PM

You clicked on them I assume? I have to shrink them way down to post them.

estación seca 10-17-2016 02:57 PM

Dollythehun, the photo uploading box says these are the limits for photos in JPG format:

1024 x 768 pixels
97.7 KB size

So if you resize to 1024 x 768 you should have a decent photo. I use
Resize Images online
to do the resizing.
For 2 Select New Maximum Image dimension
I use Custom and put in 1024 pixels.
For 4 Set resized image quality (jpg compression)
I use Best.

Upload your photo. It resizes it and displays the resized version. Download it to your computer then upload it to Orchid Board.

Dollythehun 10-17-2016 03:59 PM

I attempted that, as you pointed out before. For some reason today, I had to reduce to the smallest size to get them through.They simply wouldn't post otherwise.
I am using the Image Shrink app. It considers that size "large," and today the Board would only take small. This works in reverse for shoes and clothes. :)

u bada 10-17-2016 04:32 PM

I just sorta perused through the thread so i probably missed some details... but I'd just add that the plant itself overall looks great, I wouldn't worry all that much... but I would definitely keep it drier - ie water well and let completely dry before you water again, and give it a fair amount of air flow.

these dendrobium types generally like higher light short of hot western direct sun, and drying out between waterings. The black spots- which look bacterial- are generally from water sitting on leaves with high humidity, low air flow, or too much water in general.

webs look like normal spider webs to me

estación seca 10-17-2016 04:44 PM

NKOrchid is in Denmark, which doesn't exactly have high light intensity nor lots of heat.

NKOrchid 10-17-2016 04:53 PM

Nope, Scandinavia is really not a great place to grow orchids. At least not most orchids. It just kind of gets the light it can so I'm hoping for the best (that it will adjust or at least survive). This is my hope for all my orchids, since I know the climate here isn't really suitable for orchids, they have to adapt to some degree or I'll have to accept that some just die.
Does any of you know of orchids that are easy to grow that doesn't require a lot of light, humidity and warmth? I can't really afford lights, humidifiers, fans, etc.
I bought a masdevallia measuresiana a while ago. I bought it when it was still too small to flower. It has grown, but hasn't yet flowered. It seems to be doing good, though.

u bada, I'll be changing the potting medium soon and then I will definitely do as you say and keep it drier and let it dry out before watering it again. With its current medium it is almost impossible for it to dry out. I think I will re-pot it in medium sized bark and leca.

rbarata 10-17-2016 05:11 PM

If I lived in Scandinavia I would grow draculas.


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