DATCP’s annual fall abundance survey documented a statewide average of 40 European corn borer larvae per 100 plants (grain corn). This compares to 24 per 100 in 2000, and a 55-year average of 48 larvae per 100 plants. In a 10-year context, this year’s average is low to moderate; then again, some unprecedented averages were recorded in the last decade. In fact, during the 1990’s, the greatest fluctuations in overwintering populations in the 59-year history of this survey were documented. The 1995 survey found the highest statewide average of 197 borers per 100 plants, and the lowest average, 5 per 100, was recorded in 1998. Two hundred and twenty sites were included in this year’s survey. The number of sites selected per county was based on the acreage of grain corn planted.