Thanks again David!
>________________________________
> From: David A Rosenberger <da...@cornell.edu>
>To: Apple-crop discussion list <apple-crop@virtualorchard.net>
>Sent: Thursday, February 21, 2013 12:05 PM
>Subject: Re: [apple-crop] Dry Agri-Mycin shelf-life
>
>
>Streptomycin is very stable when kept dry and away from light. However, it
>will break down in light. If your zip-lock bag was clear plastic and located
>on a windowsill, the product may have degraded at least to some extent.
>Otherwise, it should be OK.
>
>
>
>On Feb 21, 2013, at 2:55 PM, Rye Hefley <ducn...@yahoo.com>
> wrote:
>
>Hello,
>>
>>
>>I have a pouch left over that I purchased last year that was never opened.
>>There is no expiration date on the pouch.
>>
>>
>>I also have a pouch that I purchased and opened last year. The unused powder
>>remained in the pouch in a zip-lock bag. The only thing I could find is on
>>the label, "Keep tightly closed. Store at cool temperature when possible and
>>with minimum exposure to the atmosphere." I have kept the zip-lock tightly
>>closed with minimum air inside.
>>
>>Storage temperature for both (open/unopened) packages varied from about 60 -
>>85 degrees F.
>>
>>
>>
>>I found this site:
>>
>>http://extension.missouri.edu/p/G1921
>>
>>that has some general guidelines for wettable powders:
>>
>>"Moisture is the greatest factor affecting their storage, as it can cause
>>caking that may reduce the effectiveness of the pesticide. "
>>
>>
>>So that tells me as long as there is no caking both (open/unopened) should be
>>still good. Is that true?
>>
>>Your wisdom is appreciated.
>>
>>
>>Thanks,
>>Rye Hefley
>>So. Cal.
>>
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>>
>
>**************************************************************
> Dave Rosenberger, Professor of Plant Pathology
> Cornell University's Hudson Valley Lab
> P.O. Box 727, Highland, NY 12528
> Office: 845-691-7231
> Fax: 845-691-2719
> Cell: 845-594-3060
>http://www.nysaes.cornell.edu/pp/faculty/rosenberger/
>
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>
>
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