User Name

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

menu menu

Donate Now
and become
Forum Supporter.

Many perks!



Fauna Top Sites
Register Members O.C.D. Search Today's Posts Mark Forums Read
Unread 09-29-2009, 04:14 PM
nancy's Avatar
nancy nancy is offline
Senior Member

Join Date: May 2005
Zone: 9a
Location: south Louisiana
Posts: 661
Default Subdue maxx (fungicide)

Well, my friend ponied up close to $300 for a quart of this, and gave me a couple of ounces. I have downloaded a copy of the label, and the usage rate is about 15 drops per gallon (or about 5 drops for my little pressure sprayer).
Has anyone used this on orchids? Specifically I want to treat Guignardia Leaf Spot caused by Guignardia species on vandaceous orchids.
Most of us in the deep south, especially along the Gulf and Florida coasts, are familiar with this apparently airborne fungus that has our foliage resembling the texture and color of an emery board after awhile...every time a hurricane blows through, this fungus seems to come with it.
So, my questions: did you use a buffer/spreader to adjust pH? I had planned to spray the affected foliage only, and also saturate the roots, since I believe this is at least slightly systemic.
Any tips very gratefully solicited. Or any thoughts.
Regards - Nancy, queen of the unsightly fungus
Attached Thumbnails
Subdue maxx (fungicide)-vanda-fungal-spores-jpg   Subdue maxx (fungicide)-vanda-fungus-closeup-jpg  
Reply With Quote
Unread 09-30-2009, 05:35 PM
Bayard's Avatar
Bayard Bayard is offline
Senior Member

Join Date: Apr 2009
Zone: 6b
Location: NJ
Posts: 425

Hi Nancy -

Just be sure Subdue is the fungicide for your problem. I bought it for Pythium, a fungus that causes root rot. I discovered that Cleary's 3336 doesn't cover that fungus (I had my plant tested at the state agricultural extension). A cheaper alternative and broader spectrum fungicide is Banrot.
Reply With Quote
Unread 07-18-2011, 10:52 AM
DavidCampen DavidCampen is offline
Senior Member

Join Date: Nov 2010
Location: Southern California, Los Angeles
Posts: 965
Default Generic of Subdue

I see that Mefenoxam, the generic of Subdue Max, is being sold.

Mefenoxam 2 AQ Fungicide | Agricultural Products
Reply With Quote
Unread 07-18-2011, 01:49 PM
nancy's Avatar
nancy nancy is offline
Senior Member

Join Date: May 2005
Zone: 9a
Location: south Louisiana
Posts: 661

Thanks David - still pretty pricey @ $130, but less than half the price of the name brand.
Wish these things came in smaller containers; though our society has chipped in so we each get a little bit of something costly. When you only use 1ml/liter, an ounce goes a very long way!
RE: the SubdueMaxx - my most recent 2 years of foliage are unaffected, so this (alternating with Cleary's) is a good control for this fungus.
Cheers - Nancy, demoted to fungus princess
Reply With Quote
Unread 07-18-2011, 04:36 PM
Eyebabe Eyebabe is offline
Senior Member

Join Date: Apr 2010
Zone: 6a
Location: Pennsylvania
Posts: 1,477

Subdue Maxx is not the agent of choice for Guignardia Leaf Spot. Cleary 3336 is listed as an appropriate treatment as well as Copper Based Fungicides, Captan 50W, Zyban, Exotherm Termil (reading off my table )

Subdue Maxx is about the only thing that will kill Pythium/Phytophthora. I would "save" the gift from your rich friend and use the Cleary 3336
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Orchidjim liked this post
Unread 07-18-2011, 04:48 PM
glengary54 glengary54 is offline
Senior Member

Join Date: Jul 2008
Posts: 1,467

Thiophanate methyl (Cleary's 3336, Domain, Fungo) and Mancozeb (Manzate or Dithane M45.) is a proven and recommended combination of systemic fungicides to control leaf spotting. I have had very good results using this on "Thai Crud". There is no cure but this will knock it down to where it is manageable. For new lesions, I paint over them with clear nail polish to keep them from releasing new spores. Good Luck !
Reply With Quote
Post Thanks / Like - 4 Likes
Likes Eyebabe, cday2inflorida, Orchidjim, Jayfar liked this post
Unread 07-19-2011, 05:51 AM
cday2inflorida cday2inflorida is offline
Senior Member

Join Date: Sep 2006
Zone: 9b
Location: Riverviw, Florida
Posts: 860

You can get Banrot pretty darn cheap at
Banrot Systemic Fungicide 8 oz. - Green Barn Orchid Supplies
Reply With Quote
Unread 08-07-2011, 07:58 PM
Orchidjim Orchidjim is offline

Join Date: Nov 2009
Zone: 9b
Location: Florida
Posts: 53

Subdue Maxx is a GREAT fungicide and $$$, but you use about 5-7 DROPS in a gallon as I recall. So it goes a long way. But, like the other posts it isn't for your problem. When you use it do be accurate as it can sometimes cause crippling in the next flowers. Follow Eyebabe and Glengary54.
Reply With Quote
Unread 08-08-2011, 12:42 PM
orchidsamore's Avatar
orchidsamore orchidsamore is offline
Senior Member

Join Date: Apr 2009
Zone: 9a
Location: Fort myers Florida
Posts: 539

Banrot is a wettable powder and unless you have commercial sprayers with internal mixing the results can be poor. Wettable powders are not recommended for hand sprayers.

Thiophanate methyl has been recommended for so long to treat Thai Crud that almost all the variates that come in now are immune to it. I find the Vanda just outgrow the disease if given good air circulation and removal of the worst leaves. All the new growth is clean for me.

I also found Subdue is only minimally effective as a cure for Pythium. It is mostly used as a means to control spread of the disease. A pair of scissors cutting the bad leaf is still the best cure. You can usually find the generic in farm supply stores for under $100 a quart, but keep in mind it is not recommended for home use and actually illegal for the dealer to sell it to you.

Subdue does not work on Thai Crud.
Reply With Quote


drops, foliage, fungus, guignardia, orchids, fungicide, maxx, subdue

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
Will fungicide/ insecticidal soap hurt spike/ blossoms? (..._...) Beginner Discussion 18 10-24-2010 10:30 PM
If you use Listerine as a fungicide, how much do you use? peeweelovesbooks Pests & Diseases 0 12-24-2008 03:51 PM
systemic fungicide use on lepanthes? mremensnyder Pests & Diseases 0 10-03-2008 01:36 AM
In Need of a Fungicide D&S Mabel Pests & Diseases 19 04-14-2008 09:52 PM
Fertilizer plus fungicide? Marcelo Beginner Discussion 1 04-04-2008 05:01 PM

All times are GMT -4. The time now is 11:53 PM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v1.4.8 (Lite) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Clubs, ShowCase vBulletin Plugins by Drive Thru Online, Inc.