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For now, we can recommend several actions to growers who are concerned 

 with possible hydrolysis of pesticides. One choice is to apply CaCl2 

 separately from pesticides in tank mixes. Another is to pre-mix CaCl2 

 slurries 24 hours prior to adding these slurries to spray tanks. This 

 should reduce the dramatic rise in pH. Another option would be to use a 

 higher grade of CaCl2 for foliar applications, although the added cost 

 fabout $9/100 lbs.) may make implementation of this practice improbable. 

 A final option is use of commercially available buffering agents which would 

 result in solution pH ranges favoring pesticide stability. 



Table 1. Effect of CaCl2 addition on pH and pesticide degradation over 48 

 hours at 75'F 



