Shop Orchid Care OrchidTalk Orchid Forum Weather Station Links Nursery

Welcome to OrchidTalk Orchid Forums


The Friendliest Orchid Community on the Internet!


  •  » Learn to Repot your Orchids
  •  » Learn Orchid Care Tips and Secrets
  •  » Find the perfect Orchid for your Growing Environment
  •  » Chat with Orchid Growing Professionals

OrchidTalk - "Bringing People Together to Grow Orchids Better!"


Let us help you grow your Orchids better; Join our community today.


YES! I want to register an account for free right now!


Register or Login now to remove this advertisement.

Page 1 of 2 12 LastLast
Results 1 to 10 of 16
Like Tree3Likes

Anti-Fungal Ingredients for orchid germination medium?

This is a discussion on Anti-Fungal Ingredients for orchid germination medium? within the Flasking Equipment & Technique forums, part of the Orchid Propagation category; 1. I consider to add a small trace of a systemic fungicide to the orchid ...

Click here to increase the font size Click here to reduce the font size
  1. #1
    SvenLittkowski's Avatar
    SvenLittkowski is offline Rooting Member
    My Grow Area
    Outside 24/7
    Join Date
    Jun 2010
    Location
    18°00'34.21" N 76°46'52.46" W, elev. 344 ft.
    Posts
    178
    Member's Country Flag
    Recipes
    2

    Default Anti-Fungal Ingredients for orchid germination medium?

    1.
    I consider to add a small trace of a systemic fungicide to the orchid germination medium (OGM) I am creating. Is that advisable? And if so, how much systemic fungicide powder should I add for one liter of OGM?

    The aim is simply to prevent that fungal contamination leads to the loss of entire flask contents.

    2.
    Can 20-20-20 fertilizer be added in small traces, too, to the OGM? How much for 1 liter?

    3.
    What influence would silicates have to the OGM and the orchid seeds? This is merely for cosmetic application as I want to use a small amount of black mica color powder to give a dark color to the OGM, in order to see better the germinating seeds.

  2. #2
    Real Name
    Zainal Abidin Bin Othman
    Favorite Orchid(s)
    Huntleya, Bollea, Cochleanthes
    Join Date
    Apr 2006
    Location
    Melaka, West Malaysia
    Posts
    12,775
    Member's Country Flag

    Default

    As far as I'm concern never use systemic fungicide as they can inhibit the germination of some seeds but if you want to try that is a good idea...try and error.Frankly speaking if you use autoclave at 15 to 20 psi for 15 to 20 minutes we dont have any problem with fungal infections but the problem arise when you want to sow them without laminar flow success rate very low but still have another technique to improve.
    For the fertilizer you can take one tea spoon or one gram add into one liter the best always choose that contain a lots of micro elements. .

  3. #3
    SvenLittkowski's Avatar
    SvenLittkowski is offline Rooting Member
    My Grow Area
    Outside 24/7
    Join Date
    Jun 2010
    Location
    18°00'34.21" N 76°46'52.46" W, elev. 344 ft.
    Posts
    178
    Member's Country Flag

    Default

    Thanks a lot for your good advise, Zainal. I did as you suggested: small amount of fertilizer, and I also tried a very small amount of SF.

    What do you think about question #3?

  4. #4
    Real Name
    Zainal Abidin Bin Othman
    Favorite Orchid(s)
    Huntleya, Bollea, Cochleanthes
    Join Date
    Apr 2006
    Location
    Melaka, West Malaysia
    Posts
    12,775
    Member's Country Flag

    Default

    Quote Originally Posted by SvenLittkowski View Post
    Thanks a lot for your good advise, Zainal. I did as you suggested: small amount of fertilizer, and I also tried a very small amount of SF.

    What do you think about question #3?
    I have no experience for ? no 3 maybe somebody expert here will contribute their knowledge and expertise, so sorry Swen.

  5. #5
    SeanHoutman's Avatar
    SeanHoutman is offline Senior Member
    Real Name
    Sean Houtman
    My Grow Area
    Windowsill
    Join Date
    Nov 2013
    Gender
    Male
    Location
    Albuquerque, NM
    Posts
    107
    Member's Country Flag

    Default

    You asked about silicates, they probably won't affect the seeds at all. Mica is pretty much inert in the conditions of an orchid flask.

  6. #6
    SvenLittkowski's Avatar
    SvenLittkowski is offline Rooting Member
    My Grow Area
    Outside 24/7
    Join Date
    Jun 2010
    Location
    18°00'34.21" N 76°46'52.46" W, elev. 344 ft.
    Posts
    178
    Member's Country Flag

    Default

    That's great news! Thanks!

  7. #7
    Halloamey's Avatar
    Halloamey is offline Senior Member
    Real Name
    Amey Bhide
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya alliance
    Join Date
    Jul 2009
    Gender
    Male
    Location
    Pune, India
    Posts
    5,363
    Member's Country Flag

    Default

    Sven Methyisochlorothiazolinone is the product you should look into. From literature I know this is the principal product in a range of antifungal/ antibacterial products used by tissue culture labs
    Methylchloroisothiazolinone - Wikipedia, the free encyclopedia

  8. #8
    PaphMadMan is online now Senior Member
    Real Name
    Kirk
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Paphiopedilum
    Join Date
    Sep 2010
    Location
    Madison, Wisconsin
    Posts
    1,477
    Member's Country Flag

    Default

    20+ years ago Benomyl was a common anti-fungal added to plant tissue culture media. That wouldn't be the choice today, but the concept is sound as long as you choose something without toxicity problems. I have no idea what that would be, but do consider that whatever you choose to try there is no point to adding it at such a low level that it won't inhibit fungi.

    Silicates in general won't normally cause any problems, but mica has many different forms, with different chemical compositions. It should be chemically inert, but you wouldn't usually want to add aluminum, barium or cesium to germination media, for instance. Probably harmless, but have you considered charcoal powder for dark color instead?

  9. #9
    SvenLittkowski's Avatar
    SvenLittkowski is offline Rooting Member
    My Grow Area
    Outside 24/7
    Join Date
    Jun 2010
    Location
    18°00'34.21" N 76°46'52.46" W, elev. 344 ft.
    Posts
    178
    Member's Country Flag

    Default

    Hi, thanks a lot for the suggestions and advises. I will check for these fungal and algae inhibitors. Yes, I started to use charcoal, but not to make the media darker. I am not sure, how much activated charcoal 100 ml of media should have.

  10. #10
    PaphMadMan is online now Senior Member
    Real Name
    Kirk
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Paphiopedilum
    Join Date
    Sep 2010
    Location
    Madison, Wisconsin
    Posts
    1,477
    Member's Country Flag

    Default

    The Orchid Seed Bank Project website has a large compendium of media formulations. There would certainly be some examples there of how much activated charcoal to use. Maybe some with anti-fungals too.

Page 1 of 2 12 LastLast

Similar Threads

  1. orchid germination medium question
    By SvenLittkowski in forum Flasking Equipment & Technique
    Replies: 5
    Last Post: February 27th, 2014, 05:09 PM
  2. Worm Tea (All Natural Fertilizer, Anti-Fungal, and Pesticide)
    By douglas in forum General Orchid Culture
    Replies: 9
    Last Post: June 7th, 2011, 09:27 PM
  3. DIY Potting Mix Using Pet Store Ingredients
    By sewcrazy64 in forum New Growers: Ask the Senior Members
    Replies: 1
    Last Post: September 22nd, 2009, 07:59 PM
  4. Anti Fungal while flowering?
    By dps62a in forum Phalaenopsis ('moth orchid') Information
    Replies: 7
    Last Post: May 9th, 2009, 04:25 PM
  5. Mix ingredients?
    By Heather in forum General Orchid Culture
    Replies: 15
    Last Post: July 25th, 2004, 01:12 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OrchidTalk --An Orchid Growers Discussion Forum brought to you by River Valley Orchidworks. A World Community where orchid beginners and experts talk about orchids and share tips on their care, cultivation, and propagation.