Evaluation location: Iowa, United States
The plot was planted via 2-row planter on May 12, 1997. Each row was thinned to 10 plants per row just prior to infestation. Each plant was infested with ca. 50 ECB neonates at pollen shed at 6 different nodes (300 neonates total per plant); infestations were done during the month of July. Plants were split lengthwise with a band saw and total cm of tunneling was counted; rating was done at least 60 days after infestation, from July 31 to October 16, 1997. Overall average inches of tunneling in the resistant check B52 was 10 cm (10 rows of 10 plants/row). There were 0 accessions that rated a "1" - % of check < 33. There was 1 accession that rated a "2" - % of check > 33. There was 1 accession that rated a "3" - % of check > 67. There were 3 accessions that rated a "4" - % of check > 100. There were 4 accessions that rated a "5" - % of check > 133. There were 5 accessions that rated a "6" - % of check > 167. There were 12 accessions that rated a "7" - % of check > 200. There were 8 accessions that rated an "8" - % of check > 233. There were 166 accessions that rated a "9" - % of check > 267.