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1. _____                          x  _____ percent plants with light damage*     =  _____
2. _____                          x  _____ percent plants with moderate damage*  =  _____
3. _____                          x  _____ percent plants with heavy damage*     =  _____
4. Total proportion of yield loss (add lines 1 + 2 + 3)                          =  _____ yield loss 
5. _____ yield loss               x  _____ expected yield (tons per acre)        =  _____ tons loss per acre
6. _____ tons loss per acre       x  _____ price per ton                         = $_____ loss per acre
7. _____ loss per acre            x  _____ percent control*                      = $_____ preventable loss/acre
8. _____ preventable loss/acre    -  _____ cost of control per acre              = $_____ profit (loss) per acre
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*All percents must be written using decimals (i.e., 50 percent = 0.5). 
See http://www.ent.iastate.edu/pest/cornborer/commodities/sweetcorn/assessprocess for explanation of 
light, moderate, and heavy damage.

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