Economic Thresholds Calculators

First Generation Scouting     Second Generation Scouting

How many of the following do you find per plant?

Second Generation Scouting    This threshold is based on OMAF's ECB calculations for Bivoltine thresholds. This calculation assumes survival rates of two borers per egg mass. This may vary with weather and egg mass size.
Number of egg masses per plant		Cumulative counts, taken 7 days apart
% Loss per borer		enter 3 if infestation occurs after silks are brown, otherwise enter 4
Expected yield		bu/ac
Crop value		$/bu
Pesticide treatment effectiveness		% (75% is an average, use another value if desired)
		Calculate Reset

Results:
Potential % yield loss
Potential loss in dollars per acre
Preventable loss in dollars per acre*
* Compare this figure to your treatment cost per acre plus application to determine if a treatment is cost effective.