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Applying herbicides through sprinkler systems has become increasingly popular over
the past several years. The three most commonly chemigated herbicides are Kerb(
Pronamide), Prefar(Bensulide) and Dacthal(DCPA). Almost all of the Kerb, most of
the Prefar and a significant amount of the Dacthal are applied by chemigation through
sprinklers. Sprinkler systems were designed to apply water,not herbicides and care
must be taken to avoid poor or spotty weed control and/or crop injury. Care must
also be taken to clean the chemigation tank and pipe as any of these herbicides
can cause severe injury or death to other crops that they are used on. It doesn’t
take much. There are suggested cleanout procedures listed on most labels and several
products sold to accomplish this. The following table can be used as a guideline
to determine the sensitivity of some of the crops grown here to residuals of Kerb,
Prefar and Dacthal.
To contact Barry Tickes go to: btickes@ag.arizona.edu.
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For questions or comments on any of the topics please contact Marco Pena at the Yuma Agricultural Center.
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