Example: Calibrating a Fire Ant Bait Spreader

Imported Fire Ants May 15, 2007 Print Friendly and PDF




According to the product label, I need to apply somewhere between 1.5 lb and 2 lb per acre of a particular fire ant bait. Using a Herd Seeder, I collected the following information:


  • Length of test strip: 200 feet
  • Distance across which bait was distributed (swath width): 23 feet
  • Amount of bait placed in the spreader: 32 oz = 2 lb
  • Amount of bait remaining after applying bait to the test strip: 29 oz = 1.8125 lb


The Calculations:

  • Area treated = length X width = 200 X 23 = 4,600 square feet
  • Amount of bait applied = weight before - weight after = 2 - 1.8125 = .1875 lb
  • Bait per acre = 43,560 X bait applied/area treated = 43,560 X .1875 lb/4,600 = 1.77 lb per acre


Conclusion: I am applying the correct amount of fire ant bait, between 1.5 and 2 lb.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.