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Vegetable IPM Updates Archive
Cooperative Extension
Clean Your Chemigation Tank (September 30, 2015)
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.



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