Organic Pineapple Working Group

[Organic Pineapple Working Group <opwg AT lists.ibiblio.org>]

Regarding indications that ethylene is more effective than carbide (acetylene), if there is a difference, it probably isn't relevant where growers plant MD-2 or another sensitive (easy to force) cultivar.  Carbide is widely used by growers in Ghana and Taiwan and probably elsewhere because it is cheap and easy to use and is very effective.

 

In fact, I don't think the issue of whether acetylene or ethylene is more effective has ever been settled.  I am not aware of any papers where a direct comparison has been made after people learned how to use both materials effectively.

 

Duane Bartholomew

----- Original Message -----
From: Organic Pineapple Working Group <opwg AT lists.ibiblio.org>
Date: Monday, August 24, 2009 2:56 am
Subject: Re: [OP] Flower induction in organic pineapples
To: 'Organic Pineapple Working Group' <opwg AT lists.ibiblio.org>

> Calcium Carbide is not allowed under IFOAM regulations.  Only ethylene gas is allowed.  However, there are indications that ethylene is more effective than carbide. 

>  

> From: opwg-bounces AT lists.ibiblio.org [mailto:opwg-bounces AT lists.ibiblio.org] On Behalf Of Organic Pineapple Working Group
> Sent: 20 August 2009 03:28
> To: Organic Pineapple Working Group
> Cc: ilmi AT iti.lk
> Subject: [OP] Flower induction in organic pineapples

>  

> I am not sure how acceptable carbide stones are. As far as I know, on contact with water, carbide liberates acetylene gas which is an analogue of ethylene. Certain unacceptable impurities are also known to be present in tcarbide.

>  

> Would like your comments.

>  

> Shanthi

>  

> -------Original Message-------

>  

> From: Organic Pineapple Working Group

> Date: 8/19/2009 6:21:29 PM

> To: opwg AT lists.ibiblio.org

> Subject: Re: [OP] OPWG Digest, Vol 17, Issue 1

>  

> Currently there is the use of carbide stones. I am not positive on the source of this carbide, or the chemistry. It releases ETHYLENE gas upon contact with moisture.
>
> > From: opwg-request AT lists.ibiblio.org
> > Subject: OPWG Digest, Vol 17, Issue 1
> > To: opwg AT lists.ibiblio.org
> > Date: Tue, 18 Aug 2009 16:57:02 -0400
> >
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> > 1. Re: Pineapple News No. 16 (Organic Pineapple Working Group)
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> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Fri, 14 Aug 2009 16:16:11 +0530
> > From: Organic Pineapple Working Group <opwg AT lists.ibiblio.org>
> > Subject: Re: [OP] Pineapple News No. 16
> > To: "Organic Pineapple Working Group" <opwg AT lists.ibiblio.org>
> > Message-ID: <4A854073.000018.05740@ITI-PC>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Dear Duane,
> >
> > I wonder if you would be able to help with information on organically
> > acceptable methods for flower induction.
> >
> > Best regards,
> >
> > Shanthi
> >
> > -------Original Message-------
> >

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