Evaluation location: Iowa, United States
The evaluations were done in Ames, Iowa. The test plot was planted on 5/19/95. The field was thinned on 6/6/95. Ten plants per accession were infested with about 300 European corn borer neonates per plant (distributed over 6 nodes) when pollen shed began. Infestations were made from 7/5/95 through 8/9/95. 60 days after infestation, stalks were split in half lengthwise with a band saw and the total inches of larval tunneling per stalk was recorded. Stalks were split from 8/8/95 through 10/18/95. The ratings were obtained as follows: The average inches of tunneling was calculated for each accession and then was compared to this year's overall average inches of tunneling in B52 (2.33 inches), our resistant check. Inches of tunneling was then converted to a percent of the check. Resistant accessions were < 100 % of check, intermediate accessions were 100 to 199 % of the check, and susceptible accessions were > 200 % of the check.