Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.

Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
Go Back   Orchid Board - Most Complete Orchid Forum on the web ! > >
Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old 07-28-2018, 10:31 PM
bethmarie's Avatar
bethmarie bethmarie is offline
Senior Member
 

Join Date: Jul 2012
Zone: 7b
Location: North Carolina
Posts: 1,329
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium Female
Exclamation Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium

This Den Hibiki looked fine a couple of days ago when I bought it. Below are pics of what I found tonight.

I'm so hoping there's a night owl on who can identify whether this is bacterial or fungal and what the best, most aggressive treatment will be. Whatever this is, it's fast, and I'd really like to stop it before it progresses much further.
In case the last pic isn't clear, it's the underside of an affected leaf.

I'm off to do some research myself!
Thanks for any and all suggestions that don't involve napalm
Attached Thumbnails
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium-hibiki-disease_4010-jpg   Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium-hibiki-disease-rs_4011-jpg   Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium-hibiki_4013-jpg  
__________________
Beth
Reply With Quote
  #2  
Old 07-29-2018, 12:15 AM
bethmarie's Avatar
bethmarie bethmarie is offline
Senior Member
 

Join Date: Jul 2012
Zone: 7b
Location: North Carolina
Posts: 1,329
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium Female
Default

After researching, I'm still uncertain what this is.

The plant affected is a Dendrobium, so that means no copper, correct?
__________________
Beth
Reply With Quote
Post Thanks / Like - 1 Likes
Likes dounoharm liked this post
  #3  
Old 07-29-2018, 03:54 AM
Orchid Whisperer's Avatar
Orchid Whisperer Orchid Whisperer is offline
Senior Member
 

Join Date: Jul 2012
Zone: 7b
Posts: 2,711
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium Male
Default

I think it's bacterial, similar to Erwinia. The affected leaves seem to be "on their way out", I would cut those leaves off entirely, using as really sharp blade (like a single - edge razor blade). Flame sterilize & cool the blade between cuts (to prevent disease transmission.

When you are done cutting, put the plant somewhere where it is isolated and you can keep it under observation and DRY. Withhold water until you are sure it is not spreading further.

Some Dendrobiums do lose their leaves seasonally. I don't know if yours is one of those. Some orchid leaves seem more disease-prone as the leaf ages and prepares to drop off.
__________________
“The good thing about science is that it's true whether or not you believe in it.”

― Neil deGrasse Tyson

"We know the Earth is not flat because, if it was, cats would have pushed everything off the edge of it by now."
Reply With Quote
Post Thanks / Like - 1 Likes
Likes dounoharm liked this post
  #4  
Old 07-29-2018, 08:58 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,104
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Default

Soak the plant overnight in a 2% Inocucor Garden Solution. I saved a phalaenopsis with erwinia that way.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
Post Thanks / Like - 1 Likes
Likes dounoharm liked this post
  #5  
Old 07-29-2018, 09:32 AM
bethmarie's Avatar
bethmarie bethmarie is offline
Senior Member
 

Join Date: Jul 2012
Zone: 7b
Location: North Carolina
Posts: 1,329
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium Female
Default

Thanks for the fast feedback. I am pretty anxious to take the best action for this.

OW: You are correct that the affected leaves are on their way out. They separated from the canes with little resistance. Hibiki does lose its leaves on mature canes eventually. Most of the diseased leaves were still young, though.

Ray: I don't have Inocucor on hand. Wish I did.

Thanks to both of you for weighing in so fast.
__________________
Beth

Last edited by bethmarie; 07-29-2018 at 09:33 AM.. Reason: error
Reply With Quote
  #6  
Old 07-29-2018, 05:26 PM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,104
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Default

Quote:
Originally Posted by bethmarie View Post
Ray: I don't have Inocucor on hand. Wish I did.
So order it. I can ship tomorrow, so you ought to get it Tuesday or Wednesday.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
Post Thanks / Like - 1 Likes
Likes dounoharm liked this post
  #7  
Old 07-29-2018, 10:05 PM
dounoharm's Avatar
dounoharm dounoharm is offline
Senior Member
 

Join Date: Nov 2008
Zone: 7a
Location: mid west usa
Posts: 3,373
Default

no copper on dens?? my dens are subjected to the Spanish inquisition along with the rest of the heathes...ie, copper twice a year.....and, when I really feel like it, I empty the whole bench, and photon the heck out of bench wall and probably me up to the elbows....but I got over those silly dens that require special care...give me a phal type den and I am happy!!
__________________
HUG YOUR LOVED ONES DAILY!
Reply With Quote
  #8  
Old 07-30-2018, 02:37 PM
Leafmite's Avatar
Leafmite Leafmite is offline
Senior Member
 

Join Date: Sep 2010
Zone: 5b
Location: Ohio
Posts: 8,856
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Default

Until you get what Ray is offering, Isopropyl alcohol can help to dry and disinfect. I have saved orchids using it but I used cotton balls and a new one for each leaf. Spraying it would probably be easier. Just don't get the alcohol on the roots. I applied it twice a day.

I have known people in the past whose Dendrobiums all died when they accidentally used a Copper-based fungicide so it is possible that newer varieties are not as affected as in the past or, perhaps, there is some other factor in play. I have no idea. It isn't just Dendrobiums that are affected by copper...air plants and some other plants are also not cool with it. I have found with my plants that some can be pretty finicky about certain chemicals.
__________________
I decorate in green!
Reply With Quote
  #9  
Old 07-30-2018, 02:42 PM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,104
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium
Default

...and it is not ALL dendrobiums that are damaged by copper-based chemicals.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #10  
Old 08-11-2018, 11:33 AM
PaphioAdict PaphioAdict is offline
Jr. Member
 

Join Date: Dec 2017
Zone: 6b
Location: Ontario, Canada
Posts: 12
Wanted ASAP: Advice for halting sudden, virulent bacteria or fungus on Dendrobium Female
Default

I am curious how such a disease gets started in the first place. Are we watering in the evening? Is the potting media stale as in more then two years old?

---------- Post added at 11:33 AM ---------- Previous post was at 11:31 AM ----------

Quote:
Originally Posted by Ray View Post
...and it is not ALL dendrobiums that are damaged by copper-based chemicals.
Good too know Ray. I was sincerely wondering since I have one of these little creature in my house and strangely it's blooming!
Reply With Quote
Reply

Bookmarks

Tags
fast, napalm, progresses, research, stop


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Finished an inventory of my orchids. Kevin_PR Outdoor Gardening 23 03-03-2015 04:40 PM
Have you EVER seen orchid list like this??? TOMMYMIAMI Greenhouse Gardening 28 04-06-2014 02:47 PM
Fungus Bacteria or Sunburn - Dendrobium Kingianum chrisdclarke Pests & Diseases 9 04-02-2014 05:37 PM
Dendrobiums? Kali Hibiscus Terrarium Gardening 3 10-17-2011 09:04 PM
Orchid Names / Identifiers Graham Beginner Discussion 18 01-21-2008 02:19 AM

All times are GMT -4. The time now is 12:54 AM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.