Characterizing Resistance to Soybean Aphid (Hemiptera: Aphididae): Antibiosis and Antixenosis Assessment

Abstract Host-plant resistance (HPR) remains a vital tool to manage soybean aphid (Aphis glycines Matsumura), major pest of in Midwestern United States and southern Canada. HPR can be overcome by virulent biotypes A. glycines; thus, order increase the durability resistant cultivars, needs deployed strategically. To improve strategic deployment, complete understanding existing germplasm will help ensure success. In this study, we characterized determine antibiosis antixenosis categories different glycines. No-choice free-choice tests were performed on 11 previously reported plant introductions (PIs) possessing at least one biotype (1, 2, 3). Overall, found that PIs manifested differences particular category response infestation biotypes. Our data from no-choice indicate all tested possess antibiosis-based three However, strength was variable as some showed stronger toward given than others. All antixenosis, addition antibiosis. Furthermore, detached leaf assays revealed not retained excised leaves. Characterization study contribute develop strategies for future deployment cultivars developed these PIs.