Table 4-2. Adult stem rust reactions of entries in the 1984 Uniform Regional Hard Red Spring Wheat Performance Nursery [USDA-ARS, NDSU, (Miller-Statler)]. Percent Severity and Reaction 1 ---------------------------------------------------------------- Entry Fargo Oakes Minot Carrington Langdon ------------------------------------------------------------------------------ Marquis 40MSS-10-MR t-5S 0-tS tS 20MS-10S Chris 0-tS 0,tS 0 0 tS-0 Waldron 15R-tMR 0 0 0 tR,5S Era tr* 0 0 0 0 Butte 20R 0 0 0 0 SD8026 20MR-tMS 0 0 0 0 SD2956 10MR-10M 0 0 tR tR SD2968 10R-10MR 0 0 0 0 SD8036 10R 0 0 0 0 MT8043 30MR-10MS 0 0 0 tR MT808 0 0 0 0 0 MT8177 10R-5MR 0 0 0 0 MN7529 0+ 0 0 0 0 MN81270 0 0 0 0 0 MN80056 10R-10MR 0 0 0 0 MN82128 0 0 0 0 0 ND597 20R 0 0 0 0 ND603 20R-10MR,tMS 0 0 0 tMR ND602 0 0 0 0 0 ND604 10R-10MR,15MR-tMS 0 0 0 0 ND611 40M 0 0 0 0 RH833498 20R-5MR 0 0 0 0 HS78-1139 tR,tMS 0 0 0 0 HS81-55 0 0 0 0 0 HS81-12 0+ 0 0 0 0 PR2369 10M* 0 0 0 tMRMS X7993 0 0 0 0 0 WRC-80-3 tS,0* 0,5S 0 0 tS WRC-80-32 40MSS 0 0 0 tMS WA7075 0,30MSS* 0 0 0 0,5S WA7182 30MSS 0 0 0 tS WA7185 10R-5MR* 0 0 0 tR ------------------------------------------------------------------------- Date of planting, Fargo - May 4, Oakes - May 11 (overhead irrigation), Minot - May 9, Carrington - May 9 (flood irrigation), Langdon - May 14. 1 = Comma - Separation of plants into 2 or more reaction classes (segregation or seed mixture). Dash - Range in reaction on each plant or range in severity between plants with the same reaction. Natural inoculum - Additional inoculations of races 15(TLM), 15(TNM) and 15T-(QSH) at Fargo. Percent severity = Percent of infection according to the modified Cobb Scale. t (trace) equals less than 5% severity. + - severity was t-5% greater at hard dough stage of growth. * - severity was 10-20% greater at hard dough stage of growth. The increase in infection often occurred on the peduncles. Some reactions changed to the next higher reaction class. Reactions = No visible infection (0), resistant (R), moderately resistant (MR), intermediate (M), moderately susceptible (MS), susceptible (S). Majority of the readings were made at soft dough.