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compostteas - [Compostteas] Potassium bicarbonate

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  • From: "Kevin Chambers" <kevin AT ovs.com>
  • To: <Soilfoodweb AT aol.com>, <compostteas AT lists.ibiblio.org>
  • Subject: [Compostteas] Potassium bicarbonate
  • Date: Mon, 15 Jul 2002 17:00:33 -0700

We have extensive experience using potassium products to clean up powdery mildew on wine grapes.  We’ve used Kaligreen (which is approved for organic use) for several years.  Usually, a single application of 2.5 #/acre is sufficient to eradicate PM.  However, with persistent infections we’ve gone as high as 5#/acre and had to repeat the application up to three times; each application being separated by two to three days. 

 

We’ve also used the fertilizer potassium carbonate (a significant portion becomes bicarbonate as it’s sprayed), but this is NOT organically approved.  Currently, we prefer to use monopotassium phosphate (the proprietary form called KEEP is labeled as a fungicide).  Even though it also is not organically approved, it’s a great way to deliver important foliar nutrients and blast PM with the same spray. 

 

Bear in mind that NONE of these approaches offer any residual protection—this is an eradicant only.  We are currently using this approach to supplement the use of CT as a foliar fungicide. 

 

Kevin Chambers

 

-----Original Message-----
From: compostteas-admin AT lists.ibiblio.org [mailto:compostteas-admin AT lists.ibiblio.org] On Behalf Of Soilfoodweb AT aol.com
Sent:
Monday, July 15, 2002 9:48 AM
To: compostteas AT lists.ibiblio.org
Subject: [Compostteas] [Compost tea) Re: Potassium Bicarbonate]

 

Forwarded with Tom's permission -


In a message dated
7/14/2002 7:51:07 PM Pacific Standard Time, TPiatkowsk writes:



Elaine,

As I discussed with Tim, ARMICARB 100 is a very effective potassium bicarb product. Its enhanced activity over other materials on the market is primarily due to the surfactant system that is added.

However, one of the surfactants is not organic and ARMICARB 100 is not approved for organic certified growers. An 'organic version' is just around the corner. keep you posted.

I would not recommend the use of sodium becarb for phtyo reasons.

Sincerely,

Tom Piatkowski






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