sick Dendrobiums

Help! I recently ordered some Dendrobiums to add to my expanding orchid collection. The plants were shipped bare root and seemed to be in decent shape despite the weather here (freezing!). I have two questions about these new plants since I am new to dendrobiums.

1) The plants were sold in spike but one spike broke in transit and the other seemed to have been aborted (withered and fell off). Is there any way I can encourage respiking? (cut at node like phals).

2) Two of the plants seem to be suffering. Their leaves are yellowing and dropping and there is yellowing rings around each node on the canes. What could cause this (stress? overwatering? cold drafts?) Is there anything I can do? They are by the window now which provides plenty of light for both my catts, phals, and oncidums, and there is only a little cold air that can get in but mostly my apartment is around 73-80 degrees.

Thanks for any help!

PS How do you post images that aren't at a URL? I can send pics if that helps.

Resize your fotos to no larger than 700x700. Then go to the "Go advance" button scroll down till you see the button "Manage attachments, click on it and a window will open then go to browse and pull up your resized foto. Hit upload, then close window and go to paper clip on the go advance window. Click on the down arrow on the paper clip and your attachment will appear, click on it. Before submitting the post, I would suggest you preview it by hitting the preview post button. If you're happy with it hit the submit button....Hope I haven't totally confused you. There is also a great help section titled 'How to" on this forum. Check it out. You get there by clicking on the Orchid Talk words at the top of the page. Look around, you'll find it.

Here is one of them. Not so pretty. The other is even worse, only one leaf left.

Attached Images

 

Here is one of them. Not so pretty. The other is even worse, only one leaf left.

Attached Images

 

Those appear to be cold exposure damage.
Most cane dendrobiums prefer warmer climates and bright light - a bit warmer than cattleyas.
Some just simply drop all their leaves in response to winter. Even a healthy plant could drop its leaves prematurely if it is exposed to very cold temperatures - such as shipping during winter.

There is nothing that can be done to save the leaves once they turn yellow and wilt. If the canes are healthy, new canes will sprout from the base of the plant.

I agree. What you are seeing is typical of the hard cane dendrobiums in Winter. Take care of them properly and you'll have blooms next year.