Evaluation location: Wisconsin, United States
In 2007, 12 random seedlings per accession were transplanted into each of two replications at Hancock in a randomized complete block design. As in 2006, Red Norland was included as a susceptible check. Standard cultural practices were used in the field, except that pesticides were not used to control Colorado potato beetle. Individual plants in each plot were scored for percent defoliation on 2, 9, and 16 July and 1, 13 and 21 August. The AUDPC was calculated for each accession based on mean larval defoliation scores on the six score dates. Low scores indicate resistance to CPB.