Evaluation location: North Dakota, United States
Testing is conducted using a randomized block design with up to four replications. Red Sunflower Seed Weevil data for cultivated accessions are the percentage of seeds per plant damaged by the RSSW (orgvalue) and the number damaged relative to that on the check (Hybrid 894). Data for the wild accessions are given relative to the test average rather than relative to 894. A small set of accessions in test 9413 were found to have two morphological types. One type was consistently resistant to the rssw and the other type was susceptible. The accessions have been tested numerous times and have been consistently resistant, if the proper type was evaluated. The morphological type is indicated in the comment field of the observation records. The following accessions have information for two morphological types: PI 170411, PI 170417, PI 170424, PI 175730, PI 253417, and PI 480471.