Corn Earworm Economic Threshold Calculator

Use the calculator below to estimate an economic injury level for corn earworm in soybean. You'll need to know the sampling method, row spacing, expected annual costs for control, and the price of soybeans.
  Sampling Method
Control Costs ($)
(Product + Application)
Price of Soybean ($) per bushel
Row Width
EIL:   caterpillars per
Beat cloth: sample two rows, 3 feet on each side, for a 6 row-foot sample
Sweep net: each sweep should cover 5, 3, or 2 rows of 7 inch, 14 inch, or 21 inch rows, respectively
Rigid beat cloth: sample two 7" rows simultaneously (side by side rows) or one row if at, or above, 14 inch row width
Use the scratch pad below as a simple calculator. Type in an expression and click 'Evaluate'.
  Scratch pad: =

URL: Corn Earworm Economic Threshold Calculator
Adapted from Corn Earworm Calculator Copyright © 2000 Virginia Tech
Cooperative Extension Service, NC State University
Comments to Dr. Dominic Reisig
Department of Entomology, North Carolina State University,
Plymouth, NC 27962, USA