Too much light?
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.

Too much light?
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #11  
Old 10-19-2018, 01:38 AM
estación seca's Avatar
estación seca estación seca is offline
Senior Member
 

Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
Posts: 9,283
Too much light? Male
Default

Systemics get into the vascular tissues of plants - the veins - but not so much into the cells themselves. Chewing insects will eat veins, ingest the poison and die. Mites being so small stick their proboscidea into individual cells or groups of cells, not veins, so they are not much exposed to systemics.

Imidacloprid applied to a mite's body will kill it, but systemic imidacloprid is not effective for mites.

No Dens should dry out when they are pushing active growth. I'm more and more convinced most people lose Dens because they don't water enough when new growth is forming. The Aussie Dens descend from ancestors with a much drier winter, when they are not pushing growth. But if it is making new growth, water heavily.
__________________
It's a dry heat.
Reply With Quote
  #12  
Old 10-19-2018, 12:15 PM
Cym Ladye Cym Ladye is offline
Senior Member
 

Join Date: Jul 2008
Zone: 9b
Location: Northern California
Posts: 1,737
Too much light? Female
Default

This does not look like any mite damage I have ever seen. I would look further into one of the viruses but if it is a small plant, I would toss it. I would send a photo to Sunset and ask his opinion. He is very reputable.
Reply With Quote
  #13  
Old 10-21-2018, 11:51 PM
SundayGardener SundayGardener is offline
Member
 

Join Date: Oct 2017
Zone: 5a
Location: Wisconsin
Posts: 86
Too much light?
Default

That's a good idea. I will contact him. I'm embarrassed though... a bad tender of his orchids If nothing else, I'm wondering if I should remove the leaves, or the entire cane.

It's separated from the other dendrobiums at this point. I've seen a few dodgy leaves on them too but I'm watching them.

Not to sound like a complete idiot, but isn't it time yet to lay off the heavy watering? It's mid-October! It's cold! We saw snow yesterday! These dens aren't going to lose their leaves, so what I'm asking is how do I know when to back off? I've got one that just keeps on producing new shoots.

On the other hand, I've got an unexpected bud on a cattleya so they seem to have their own ideas about timing.
Reply With Quote
  #14  
Old 10-22-2018, 07:07 AM
Dollythehun's Avatar
Dollythehun Dollythehun is offline
Senior Member
 

Join Date: Aug 2016
Zone: 6a
Location: Northern Indiana
Posts: 3,845
Too much light? Female
Default

If you see active growth, I personally, would keep watering.
Reply With Quote
  #15  
Old 10-23-2018, 03:22 AM
estación seca's Avatar
estación seca estación seca is offline
Senior Member
 

Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
Posts: 9,283
Too much light? Male
Default

You water heavily from the time (usually spring) you see new growth eyes elongating at the bases, and new roots forming, until all the new growths are mature and finished growing. Then you cut back.
__________________
It's a dry heat.
Reply With Quote
Reply

Bookmarks

Tags
dendrobiums, light, picture, spotting, types


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
Visiting New World Orchids: 09/14/13 MattWoelfsen Vanda Alliance - Neofinetia 11 09-17-2013 02:13 PM
fluorescent grow lights clusty Advanced Discussion 28 07-22-2013 06:18 PM
Light for vegetative growth vs flowering? Magnus A Growing Under Lights 11 11-23-2008 08:58 PM
Brassolaeliocattleyas *whew what a mouthful!!* charmbutterfly Cattleya Alliance 13 12-19-2007 03:07 PM
Fine I'll say Hi Vim Introductions - Break the Ice ! 13 04-02-2006 01:30 AM

All times are GMT -4. The time now is 07:22 PM.

© 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.