Comparisons should be made only among entries within maturity groups. The SDS tolerance test was conducted in a field near Ames, Iowa. To ensure uniform disease pressure across plots, we artificially infested test plots at planting with a method developed in our laboratory. Lines were replicated three times. Lines were evaluated in early September and each line was given a numerical tolerance score from 1 to 10 based on leaf symptoms with 10 indicating 100 percent defoliation.
Low scores indicate a high level of tolerance.
Most entries in our tests are tolerant to this disease. If you observed severe SDS in your field in the past few years, you may want to select varieties that are tolerant to this disease based on the information in the table below. Yield loss may not be a concern if the tolerance score is less than 3. 2.3 3.8 47.5 Novartis Seeds Inc. This information subject to a usage policy .