Table 23. Adult leaf rust reactions in the 2001 HRSWURN [USDA-ARS, NDSU, (Miller, Rasmussen)].
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Line Percent Severity and Reaction
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Fargo Carrington Langdon C.I.*
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MARQUIS 10MS-tS 10S-5MS 20S 14.2
CHRIS 10MS 5R 10R 3.7
2375 10R tMS 10R 1.5
VERDE tMS 5R 5R 0.8
KEENE 10R 0 10R 1.3
SD3367 5R 0 0 0.3
SD3496 5R 20S-10MS 5MS-tS 11.2
SD3506 tMR 5R 5R 0.7
SD3540 5MS-tMR tMS 5R 1.9
SD3546 5R tMR 5R 0.7
MN97803 5MR-tMS tMR 10R 1.5
MN97448 5R 10R 5R 1.3
MN97063 5R 10R 5R 1.3
ND729 5MS-tMR tMR 10R 2.1
ND740 5R 5R 5R 1.0
ND741 5MS-5MR 5R 5R 2.7
ND742 tMR 0 tMR 0.1
ND743 10R 0 5R 1.0
98S0191-60-8 tMR 10R 5R 1.1
N96-0055 5MR 5R 5R 1.3
N97-0100 tMS 10R 5R 1.1
N97-0117 5R 5R 5R 1.0
N97-2627 5MR 5R 5R 1.3
N97-0189 tMR 5R 0 0.4
WA7859 5R 10R 5R 1.3
WA7899 10MS 5MS-tS tMR 4.2
WA7875 20MS 10R 5MS-tS 7.5
FA900-720 20MS 10S-5MS 20S-10MS 19.3
FA900-793 tMR 0 tMR 0.1
BW270 tMR tMR 5MR-tMS 0.9
RL4958 5R tMR-tMS 5R 0.9
MT9874 ** 0 10MR-tMS 2.2
Baart (CK) ** 10S 11S
Thatcher (CK) 10S 10S 40s
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Date of Planting - Fargo; 5/17/01, Carrington; 4/30/01, Langdon; 5/15/01.
** = Line/cultivar not evaluated for leaf rust in Fargo because of heavy stem rust infection.
* C.I. = Average Coefficient of Infection. Percent severity multiplied by the following values for
reaction type. R = 0.2, MR = 0.4, MS = 0.8, S = 1.0, t = 0.5. Multiplication was carried out for
each station and then the average was determined across stations.
Leaf rust was light this year at the time of data collection. Carrington was read approximately
1 week (7/20/01) too early. Langdon (8/3/01) and Fargo (7/24/01) were read at appropriate times, but
heavy stem rust infections made it difficult to evaluate leaf rust in Fargo.