Table 4-1. Adult field reaction to rust on uniform regional hard
red spring wheat entries, in the 1971 Fargo rust
nursery. (North Dakota-ARS).
Seeded: May 14
Variety
or Percent Severity Reaction 1
State No. Leaf Rust 2 Stem Rust 3
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MARQUIS 5-20S 30S,tS
JUSTIN 5S 0,10S
SELKIRK 15MR-1OMS 0
CHRIS tMS 0
WALDRON tR 0,10S
NEEPAWA 1OR-1OMS 0,tS
ND 491 tR 0
ND 506 tR 0
14D 501 tR 0
ERA** tR-tMR 0
FLETCHER** tR-tMR 0
BONANZA** tR 0
WORLD SEED 1809** tR 0
BOUNTY 208** tR 0,20MS
ND 499** tR 0
ND497** tR tR
WIS 271** tR 0
H678-1-6-9** tR 0
LARK** tR O,tS
NK 70Y14 tR-tMR 25MR
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**Semidwarf
1 = Comma - Separation of plants into 2 or more reaction classes. Segregation or
seed mixture.
Dash - Range in reaction on each plant. Range in severity between plants but
same reaction class.
2 = Natural inoculum. Readings based on reactions of the flag leaf and flag leaf
minus 1.
3 = Natural inoculum in addition to inoculations of race 15B.
Notes:
1 - Leaf spot diseases were common.
2 - Rust readings commenced on 7/22 and completed on 8/17.
3 - Normal temperatures and adequate moisture occurred for establishing rust.
However, leaf rust severity remained low during the first half of the
growing period. High temperatures on 8/7-8/9 forced plants to maturity and
may have affected severity in stem rust susceptible entries.