IPM : Decision Aids : First-Generation Corn Borer Calculator

Management Calculator
for First-Generation European Corn Borer

To decide whether it will be profitable to treat a field infested with first-generation corn borers, the following information is needed:

Total number of larvae found.

Total number of plants examined.

Expected yield per acre.

Value of grain per bushel.

Cost per acre for insecticide treatment.

Enter these data into the following worksheet to calculate the gain or loss for applying an insecticide to control corn borers.

Enter total number of larvae found
Enter expected survival rate¹ Enter percentage as a decimal (for example, 20% = 0.2)
Enter the number of plants examined
Choose an expected yield loss per borer:
Enter the expected yield *(in bushels per acre)*
Enter the value of grain per bushel	$
Choose a percentage for control:
Enter the cost of control per acre	$

¹If larvae is newly hatched (first instar), it is likely that only about 20% will survive to maturity, depending on environmental stresses. If larvae are second instar (about ³/₁₆ inch) or larger, the survival rate may increase to 50%. Adjust this number accordingly.

	Management Calculator for First-Generation European Corn Borer Management Calculator for Second-Generation European Corn Borer

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