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  • From: pureprairiefarm AT gmail.com
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] Injecting Winter and Summer Squash with Bt
  • Date: Thu, 28 Jul 2011 15:01:41 +0000

Thanks Etienne, good information.

What does boron toxicity look like?

Bill

Sent from my U.S. Cellular BlackBerry® smartphone

-----Original Message-----
From: Etienne Goyer <etienne.goyer AT outlands.ca>
Sender: market-farming-bounces AT lists.ibiblio.org
Date: Thu, 28 Jul 2011 10:21:05
To: <market-farming AT lists.ibiblio.org>
Reply-To: Market Farming <market-farming AT lists.ibiblio.org>
Subject: Re: [Market-farming] Injecting Winter and Summer Squash with Bt

On 11-07-28 09:51 AM, pureprairiefarm AT gmail.com wrote:
> Hi Ben,
>
> Generally, pith issues is a boron deficiency. Boron leaches readily
> So we need to keep up with it.
>
> Maybe put some borax around a couple plants and water it in? Might be
> worth a try. I use boric acid powder found in natural ant and roach
> killers and spray it on the leaves to get it in faster.

Agronomic Borax is 15$ for 10 lbs at my local feed store. I ended up
buying 10l (2.5 gallons) of 10% liquid Solubor for 75$; I should have
enough boron for the next five years. I would look for that instead of
using boric acid.

Dosage is very tricky, as boron can be toxic to plant at fairly low
concentration. I sprayed (with a backpack sprayer) a 0.001% boron
solution by volume, and potatoes responded positively; it didn't killed
the beets either. Of course, your mileage may vary, so read the label
and/or ask your extension agent! :)

But before I would do any of that, I would start with a soil test. Mine
tested boron at 0.54 ppm (using hot water extraction). It's recommended
to supplement boron when soil level is below 1.1 ppm.
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