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 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 22

Do I need Physan 20?

This is a discussion on Do I need Physan 20? within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; That is true, Jojo, but a drop of dishwashing liquid will do the same thing ...

Click here to increase the font size Click here to reduce the font size
  1. #11
    espranch is offline Senior Member
    Real Name
    Betty
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    encyclia
    Join Date
    Mar 2010
    Gender
    Female
    Location
    N. East Texas
    Posts
    2,747
    Member's Country Flag

    Default

    That is true, Jojo, but a drop of dishwashing liquid will do the same thing ( wetting agent ), mixed with 10% bleach. Betty :-)

  2. #12
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya ?
    Join Date
    Oct 2010
    Location
    England, South coast.
    Posts
    3,251
    Member's Country Flag

    Default

    You are lucky to have Physan available. Physan 20 is I think the version designed for higher temperature areas (the tropics) and ordinary Physan for temperate zone areas. It is great for plant hygiene, which means cleaner stronger healthier plants.
    Unfortunately it is no longer sold here in UK ( it is not "licensed" and doing all the work to get a licence would cost , so I am told US$400,000...due to bureacracy - which gets me steamed up....) and the cost of a trip to New York, for however many gallons I could get in my luggage to bring home is just not on - but I did consider it !
    I used it from about 1990 onwards, until the supply stopped last year. I always added some to the water used for my orchids or for spraying ,at the rate of anything from 1:5000 ( in water/nutrient mix) down to about1:1000 which is approx 1 teaspoon in 1 gallon for spraying all the foliage once a month . It is a fungicide, insecticide, miticide, etc - or in other words a disinfectant which most pests will dislike, so that they don't hang around and don't spread. It is also a very good wetting agent , which means that the water really spreads around and there are no dry corners.
    This practice - the monthly spray - started when I visited and was told that this is what they do at the Eric Young Foundation which has one of the best grown orchid collections in the world. What's good enough for them, will do for me.
    Nowadays I use another similar product which is licensed in UK - one actually intended for sterilising surfaces used for food preparation - almost identical chemical formulation, and a lot cheaper per gallon ( Selgiene) but I have to use it a bit stronger down to 1:500.
    Go for Physan !
    Last edited by Dorsetman; October 18th, 2010 at 11:47 AM. Reason: typos

  3. #13
    ManilaByNight's Avatar
    ManilaByNight is offline Senior Member
    Real Name
    Jojo
    My Grow Area
    Porch/Patio.
    Favorite Orchid(s)
    Phals, Vanda, Cattlya, Species
    Join Date
    May 2009
    Gender
    Male
    Location
    Quezon City, Philippines
    Posts
    1,067
    Member's Country Flag

    Default

    Quote Originally Posted by espranch View Post
    That is true, Jojo, but a drop of dishwashing liquid will do the same thing ( wetting agent ), mixed with 10% bleach. Betty :-)
    Yes I agree and it is a much cheaper method too.

    Although the thing I like about Physan 20 is its ability to kill algae growth and also its ability as a deterrent against mosquito larvae developing into winged adults. This ability specially against mosquitoes is very helpful for us growers here in the tropics, specially in the Philippines where the risk of dengue is a reality.

  4. #14
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya ?
    Join Date
    Oct 2010
    Location
    England, South coast.
    Posts
    3,251
    Member's Country Flag

    Default

    Quote Originally Posted by ManilaByNight View Post
    Yes I agree and it is a much cheaper method too.

    Although the thing I like about Physan 20 is its ability to kill algae growth and also its ability as a deterrent against mosquito larvae developing into winged adults. This ability specially against mosquitoes is very helpful for us growers here in the tropics, specially in the Philippines where the risk of dengue is a reality.
    Dishwashing agent is not a good idea . The one often sold in UK is Fairy Liquid - with the tv jingle "kind to your hands" - that is because it has glycerine included. Kind to your hands, but not to your plants ! Glycerine tends to clog up the stomata - plants can't breathe then. Don't do it. A wetting agent , yes, buit dishwasher rinse aid , dishwasher liquid, no, no, no....

  5. #15
    ManilaByNight's Avatar
    ManilaByNight is offline Senior Member
    Real Name
    Jojo
    My Grow Area
    Porch/Patio.
    Favorite Orchid(s)
    Phals, Vanda, Cattlya, Species
    Join Date
    May 2009
    Gender
    Male
    Location
    Quezon City, Philippines
    Posts
    1,067
    Member's Country Flag

    Default

    Thanks Geoff for the tip.

    Hadn't thought about the glycerine content ...

  6. #16
    hanka's Avatar
    hanka is offline Senior Member
    Real Name
    Danuta Panczyk
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Paphiopedilum
    Join Date
    Feb 2009
    Location
    Rzeszow Poland
    Posts
    154
    Member's Country Flag

    Default

    Quote Originally Posted by Dorsetman View Post
    Unfortunately it is no longer sold here in UK ( it is not "licensed" and doing all the work to get a licence would cost , so I am told US$400,000...due to bureacracy - which gets me steamed up....) and the cost of a trip to New York, for however many gallons I could get in my luggage to bring home is just not on - but I did consider it !
    My friend bought from internet auction physan from firm from USA. 6,90 cost + US $16,00 shipping. Packet reached to Poland without problems after several days.

  7. #17
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya ?
    Join Date
    Oct 2010
    Location
    England, South coast.
    Posts
    3,251
    Member's Country Flag

    Default

    That would not have been a very large quantity I think ? I used to buy it in 1 US gallon bottles , and the UK price was about the same as US$120 - of course things imported from USA always cost morein UK- at one time I used to do my shopping for clothes in Florida - if I filled a case, the savings paid the air-fare . I never understood why there was such a difference.

  8. #18
    hanka's Avatar
    hanka is offline Senior Member
    Real Name
    Danuta Panczyk
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Paphiopedilum
    Join Date
    Feb 2009
    Location
    Rzeszow Poland
    Posts
    154
    Member's Country Flag

    Default

    In was packaging 16oz. 128 oz Physan 20 Gallon costs about US $35

  9. #19
    rodgy is offline Junior Member
    Join Date
    Oct 2010
    Location
    N Ireland
    Posts
    9
    Member's Country Flag

    Default

    Quote Originally Posted by Dorsetman View Post
    You are lucky to have Physan available. Physan 20 is I think the version designed for higher temperature areas (the tropics) and ordinary Physan for temperate zone areas. It is great for plant hygiene, which means cleaner stronger healthier plants.
    Unfortunately it is no longer sold here in UK ( it is not "licensed" and doing all the work to get a licence would cost , so I am told US$400,000...due to bureacracy - which gets me steamed up....) and the cost of a trip to New York, for however many gallons I could get in my luggage to bring home is just not on - but I did consider it !
    I used it from about 1990 onwards, until the supply stopped last year. I always added some to the water used for my orchids or for spraying ,at the rate of anything from 1:5000 ( in water/nutrient mix) down to about1:1000 which is approx 1 teaspoon in 1 gallon for spraying all the foliage once a month . It is a fungicide, insecticide, miticide, etc - or in other words a disinfectant which most pests will dislike, so that they don't hang around and don't spread. It is also a very good wetting agent , which means that the water really spreads around and there are no dry corners.
    This practice - the monthly spray - started when I visited and was told that this is what they do at the Eric Young Foundation which has one of the best grown orchid collections in the world. What's good enough for them, will do for me.
    Nowadays I use another similar product which is licensed in UK - one actually intended for sterilising surfaces used for food preparation - almost identical chemical formulation, and a lot cheaper per gallon ( Selgiene) but I have to use it a bit stronger down to 1:500.
    Go for Physan !
    I have been looking for a biocide that could be used as an alternative to physan 20 too.

    I googled selgiene and it brought up Selgiene Ultra by Selden, is this the right one?

  10. #20
    moniluhum is offline Senior Member
    Real Name
    Monica
    My Grow Area
    Greenhouse
    Join Date
    Dec 2012
    Gender
    Female
    Location
    New Orleans, Louisiana
    Posts
    977

    Default

    Can you use Physan 20 as a preventive say for example if your not sure the plant has the fungus? Also, if you have applied it on a affected plant. How long afterward do you have to quarantine the plant?

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. how much physan?
    By nicki in forum Orchid Ailments / The Compost Pile
    Replies: 17
    Last Post: August 1st, 2011, 01:36 PM
  2. the big guns: non-physan systemics, etc.
    By kewpie in forum General Orchid Culture
    Replies: 11
    Last Post: April 18th, 2010, 08:18 PM
  3. Using Physan 20 for plants getting algae in S&H
    By Becky15349 in forum General Orchid Culture
    Replies: 3
    Last Post: May 11th, 2008, 10:36 AM
  4. physan resistance
    By kewpie in forum General Orchid Culture
    Replies: 18
    Last Post: July 30th, 2004, 09:28 PM
  5. Physan on a Spiking Masdie?
    By Heather in forum General Orchid Culture
    Replies: 18
    Last Post: May 27th, 2004, 09:37 AM

Tags for this Thread

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.