Go Back   Orchid Forum Orchid Care > Orchid Care > Orchid Pests and Diseases

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 12-20-2013, 03:20 PM
Catt Mandu's Avatar
V.I.P Member
PhotobucketPhotobucketPhotobucketPhotobucket
 
Join Date: May 2012
Location: Georgia (USA)
Posts: 2,111
Thanks: 404
Thanked 820 Times in 597 Posts
Catt Mandu is on a distinguished road
HELP needed with a rescue (and with a rough ID)

A co-worker's husband told me about an orchid that he had that was struggling (one of several plants given to him by a friend). I agreed to have a look at it, see if I could help.

First off, what is it? Here's a couple pictures:

img_20131220_085028_989_640x480.jpg
img_20131220_090946_698_640x480.jpg

From the plant morphology, I am thinking some type of Dendrobium. Longest cane is roughly 6 inches (15 cm), longest leaf roughly 4 inches (10 cm), widest cane about 0.5 cm (0.2 inches) near the top, narrower toward the base. There is no indication that this plant has bloomed any time recently.

I know a species determination is not possible, any idea what category to place it in for cultural purposes?

OK, on to cultural concerns. First thing I plan to change, it appears seriously over-potted. I will re-pot into a much smaller pot, as soon as I have a recommendation for new potting medium. Right now, it is mostly in fine hard charcoal, with some fir bark and a little perlite; bark does not seem decomposed at all. Should I stick with any/all of these in the medium? Or switch to something else?

There are very few live roots right now. Here are the only ones I see:

img_20131220_090859_840_annot_640x480.jpg

close-ups:

img_20131220_090859_840_crop_640x480.jpg

img_20131220_090859_840_crop_no2_640x480.jpg

I have some Dyna-gro KLN, would a periodic soak (say, for 15 minutes every couple of weeks) be helpful for getting the few existing roots to grow? Other suggestions?

Finally, one of the newer growths has some leaf issues, which I think look fungal:

img_20131220_132834_351_652x344.jpg

I was planning to clip off the affected leaves a cm or so below the diseased tissue, allow to heal, treat periodically with Neem as a first line fungicide, switch to something like Cleary's if needed.

Any other cultural suggestions (watering, rest periods, etc) would be appreciated. Thanks!
__________________
Je suis Charlie
Reply With Quote
  #2 (permalink)  
Old 12-20-2013, 06:18 PM
coffeecup's Avatar
Executive Senior Member
PhotobucketPhotobucketPhotobucketPhotobucket
 
Join Date: Feb 2007
Location: Bay Area, CA
Posts: 1,305
Images: 6
Thanks: 180
Thanked 358 Times in 203 Posts
coffeecup is on a distinguished road
I agree with the Dendrobium theory. I'd stick that in some sphag in a much smaller pot and wouldn't fertilize it too much. if you have something that boosts the roots, then go with a weak formula of that. I wouldn't worry about a rest period either, I think its beyond that. Its going to need a lot of TLC to bring it back. Good luck!
__________________
~Therese
Reply With Quote
  #3 (permalink)  
Old 12-20-2013, 07:27 PM
Fishmom's Avatar
Senior Member Photobucket
PhotobucketPhotobucketPhotobucketPhotobucket
 
Join Date: Dec 2007
Location: Benicia, California, USA
Posts: 2,723
Images: 194
Thanks: 522
Thanked 1,261 Times in 950 Posts
Fishmom is on a distinguished road
It looks like a dendrobium to me, also. I have a couple of plants that have been severely compromised, and I have been giving them a squirt with a spray bottle of root stimulant, daily or every other day, as they lay on their bed of sphag (in one case) or bark mix (in the other). Both are sprouting new growth and roots, so it is working. I like the idea of using the medium that I will be using if the plant actually survives, to make an easier adjustment for the new roots.

Personally, I would use new medium regardless of the type, just in case there is a bed of fungus in there. I am using a seaweed fert in my spray bottle, but I have used KLN before and got good results from that too. I just like to change them out occasionally.
Reply With Quote
  #4 (permalink)  
Old 12-21-2013, 03:09 AM
gnathaniel's Avatar
Member
 
Join Date: Feb 2010
Location: Athens GA, USA
Posts: 274
Thanks: 45
Thanked 173 Times in 118 Posts
gnathaniel is on a distinguished road
Definitely a Den and my money's on a hybrid in section Dendrobium (aka 'nobile-type'), I'd guess one with a high percentage of moniliforme ancestry. Looks like you have two nice healthy clumps, I wouldn't worry too much about the lack of roots or condition of leaves as these will do well kept pretty dry for the winter.

I'd suggest holding off on KLN for now, better to keep them dormant until spring when new growths will normally push out large flushes of roots anyway. My method for reviving these would be to put them bareroot in small clay pots, with just a couple large chunks of quartz or granite to hold roots (live or dead) in place. Keep the stones well below the base of the canes, water every 1-1.5 weeks (I like the pot to be pretty crispy-dry for 2-4 days before watering again this time of year), and keep in a coolish, airy, and moderately bright location for the winter. Once you see new growths in the spring, push some sphagnum into the top of the pots for roots to grow into, still staying away from the base of mature canes, and when you see the first flush of roots then start watering to stay constantly moist through the warm months.

Stick mounts and wooden baskets also work well, I have a nice Den. Kokomo on a stick just coming into bloom. I'll try to get a decent photo and might be able to take a division this spring if you're interested, it's an easy grower in our climate and the fragrance is outstanding.
__________________
--Nat--
Reply With Quote
  #5 (permalink)  
Old 01-09-2014, 02:57 PM
Catt Mandu's Avatar
V.I.P Member
PhotobucketPhotobucketPhotobucketPhotobucket
 
Join Date: May 2012
Location: Georgia (USA)
Posts: 2,111
Thanks: 404
Thanked 820 Times in 597 Posts
Catt Mandu is on a distinguished road
Thank you!

I have been meaning to post a big "thanks" for all of the suggestions received. I blame the holidays - it just kept slipping my mind.

After posting about this here, and on another forum, I re-potted into a small terracotta pot with some quartz pebbles. I am keeping it mostly dry, only watering once every week to week and a half. In reality, it probably catches a little unintended over-spray as I water some other nearby plants.

So far, so good. Some leaves are yellowing, but I was expecting that. I just need to keep it alive until spring, then hope for some new growth. It will go back to its owner once it is healthy again.
__________________
Je suis Charlie
Reply With Quote
  #6 (permalink)  
Old 01-19-2014, 05:31 AM
orchids4me's Avatar
Super Moderator Photobucket
Photo Sharing and Video Hosting at PhotobucketPhoto Sharing and Video Hosting at PhotobucketPhoto Sharing and Video Hosting at PhotobucketPhoto Sharing and Video Hosting at Photobucket
 
Join Date: Apr 2010
Location: East bay area, California.
Posts: 10,832
Thanks: 10,154
Thanked 4,422 Times in 3,810 Posts
orchids4me is on a distinguished road
looks like a couple i have growth wise Den annosum and Den parishii the canes and leaves look similar but it could be any variation of a hybrid if is the annosum these get a winters rest google the blooms for your friend if they got it in bloom this may help determin its one of these or a hybrid to confirm winter rest period (mine are mounted)
__________________

Daisy 2003 -2013
Life is too short.... Buy more orchids!!!!

Emmaye
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Video: Some rough treatment rlilia Orchid Care Cultivation 35 12-11-2012 08:22 PM
Baby Phals looking rough remi4301 Newbie Questions 4 07-22-2006 02:15 PM






Free Vote Caster from Bravenet.com Free Vote Caster from Bravenet.com


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0
Orchid Forum

vBskin developed by: CreationLab