Evaluation location: North Dakota, United States
Densities of SBRM populations were lower than expected for St. Thomas, as reflected by overall damage ratings and numbers caught on sitcky stakes surrounding the test plots. The highest mean damage rating was 4.8 compared to 6.7 from last years evaluation. Entry PI 269309 had a slightly lower damage rating than F 1016, a SBRM-resistant line developed and released by Dr.Campbell. Entry PI 181718 (94NOO13) did not differ significantly from F 1016 in damage rating or plant stand counts. This is encouraging because entries that show lower damage ratings usually have low plant stand counts. PI 142809 had a high plant stand count and was slightly lower, although not significantly from Maribo 9363 B in damage. PI 269309, PI 181718(94NOO13), and PI 142809, should be considered for further SBRM resistance development based on damage ratings and plant stand counts.