----------------------------------------------------------------------------------------------------------------- 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 ----------------------------------------------------------------------------------------------------------------- *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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