[NAFEX] Leftover spray
hangermayer at isp.com
Sun Jun 7 20:29:13 EDT 2009
It depends on the pH of the spray solution. Captan and Imidan are among the
worst to degrade rapidly under high pH conditions. Most water supplies are
At a pH of 8 Captan has a half-life of 10 minutes. If you buffer the water
to a 5 pH, it's half-life is 32 hours.
Imidan has a half-life of 4 hours at 8 pH, and 13 days at 4.5 pH.
Additionally certain minerals in the water will tie up certain pesticides,
rendering them less effective.
----- Original Message -----
From: "akmanty" <>
To: <nafex at lists.ibiblio.org>
Sent: Sunday, June 07, 2009 6:55 PM
Subject: [NAFEX] Leftover spray
> Storing/keeping leftover spray, as Captan and Imidan:
> How long can one keep these sprays if you mixed too much, or
> conditions changed, as got too windy to apply?
> Few hours, days?? Longer??
> Karen WI
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