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- From: <dmnorton@royaloakfarmorchard.com>
- To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
- Subject: Re: [NAFEX] Calcium and Imidan
- Date: Fri, 31 Jul 2009 08:58:43 -0500
|  According to Washington State University 
Crop Protection Guide for Tree Fruits, calcium chloride for apples is compatible with wettable 
powder formulations of azinphos methyl (Guthion), diazinon, phosmet (Imidan), 
and endosulfan (Thiodan).  This information is what we based our initial 
use of Calcium with Imidan on in past years.  BUT....what we have not 
mentioned is the Ph of the initial water going into the tank and the use of a 
buffering agent to adjust Ph. The buffering agents adjust the Ph of the 
tank mix to prevent the alkaline breakdown of the chemical formulation in 
water.  We have always had to adjust our water Ph before ANY spray or 
tank mix to the label recommendations of each product going into the 
tank.  Someone mentioned the use of vinegar in their spray mix, and a 
1-cup  measure of cider vinegar to 100 gallons of water is a buffering rule 
of thumb to acceptably lower Ph.  Michael Phillips' book, The Apple 
Grower has a good section on this discussion and that is where I picked up 
on this information.  Michael participates in the Eco-Fruit Project in 
Wisconsin via conference calls each Monday morning for organic growers.  He 
reviewed this information last year during one of our calls.  Hope 
this answers your question! Dennis Norton Royal Oak Farm Orchard Office (815) 648-4467 Mobile (815) 228-2174 Fax (609) 228-2174 http://www.royaloakfarmorchard.com http://www.theorchardkeeper.blogspot.com http://www.revivalhymn.com 
 | 
- 
            
            [NAFEX] Calcium and Imidan,
            Alan Haigh, 07/31/2009
- Re: [NAFEX] Calcium and Imidan, dmnorton, 07/31/2009
 
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