Snowdrop cultivation advice

[steve owen]

 
One for the chemists; where might one buy a bottle of 1% peroxide in the UK?

[Hans J]

http://www.hbnweb.de/mathematik/mixture-proportion-calculator.html

[art600]

 

[Hagen Engelmann]

Steve, here in Germany you can buy H2O2 in every apothecary.

[Anthony Darby]

1% H₂O₂ sounds pretty week? We use 10% or 40 volumes in school. I used 10% to remove dead tissue and cure mouth rot in a Jamaican Boa over 25 years ago. You can buy hydrogen peroxide bleach and check the label to see the percentages. I'm sure chemists and supermarkets will have various products which are just diluted H₂O₂?

[steve owen]

Arthur/Hans/Hagen

Can I ask your views a little more please;

1. I'm using Chizm (active ingredient: carbendazim) as my bulb-washing fungicide. In what circumstances do you believe H2O2 might be better?

2. H2O2 at what strength/dilution?

Steve

[Hans J]

Steve :

to 1.
I have not expieriece - this active is not allowed here in Germany - only for professionals

to 2. I use H202 1% for desinfections ( for cleaning seeds ) and for wounds on bulbs
   you here buy H2O2 in different dilitions ( 33 % ) or 3 % ... with my formula is it easy to mi it self

A friend told me also it is possibly to use NaCIO ( Natriumhypochlorid )
I have asked yesterday in our apothecary it is possibly to buy in 1% ( the price is 7,30 Euro for 250 ml )

But I have no expierince with the last.

[Anthony Darby]

Don't you mean sodium (natrium) hypochlorite (NaClO) Hans? Na₂Cl doesn't exist and NaCl is common table salt.

[Hans J]

Anthony ,

my friend wrote me : Natriumhypochlorit
....the apothecary wrote me yesterday :Na2OCL

in wikipedia you found this :

http://en.wikipedia.org/wiki/Sodium_hypochlorite

I think you are rigth with : NaCIO !

[Anthony Darby]

Sodium hypochlorite is in most liquid bleaches, although the one I have in front of me now (Jeyes Parazone) doesn't actually say what's in it! (It just says under ingredients: "Anionic surfactants; Perfume; Disinfectant")

Hans, if you use 1% H₂O₂ to sterilise seeds, I wonder if that process could be used to introduce sterile orchid seeds to an agar medium without need for a reverse-flow cabinet?

[Hans J]

Anthony :

I use H2O2 1% only for seeds of fleshy Amaryllids : Clivia, Haemanthus,Scadoxus ....for one hour - this works fine- without any damages of seeds ,roots ....

After this time I lay the seeds ( p.e. CLivia + Scadoxus ) in pure Sphagnun moss for sowing.

Sorry but I have no expierience with Agar medium.

[Alan_b]

Since there seems to be some interest in the use of dilute hydrogen peroxide, here is the original reference johnw mentioned (as supplied to me by the man himself).

http://www.pacificbulbsociety.org/pbswiki/index.php/Stagonospora%20curtisii

[loes]

  You made my day!

as a non-professional I couldn`t lay my hands on any fungiside so therefore I didn`t sterilize bulbs or soil.
and now you tell me I can use peroxide!that`s available everywhere!
so next year I can try to chip a bulb 

[Hans J]

Martin :

H2O2 was earlier used to change color of the hairs 


.....so maybe "Blonde Inge" .... has worked with this 

[Anthony Darby]

Martin :

H₂O₂ was earlier used to change color of the hairs 

It still is, although it is too late for me. I think I'll have rabbits tattooed on my head. They'll look like hairs from a distance.