Meeting the Challenge of Yellow Rust in Cereal Crops - ICARDA

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moisture and temperature, yellow rust spores began to be seen, but as
temperatures increased rust spread slowed. Leaf rust was seen extensively
(Table 1).
Table 1. The material sets tested for rust diseases in 2003
Nursery
Yellow rust
Leaf rust
R MS S R MS S
Bread Wheat Crossing Block 852 139 47 247 435 386
Bread Wheat Screening Nursery 222 89 4 125 153 37
Durum Wheat Crossing Block 108 99 15 93 128 1
Durum Wheat Screening Nursery 93 199 27 174 139 6
NOTES: R = Resistant; MS = Moderately Susceptible; S = Susceptible.
In Menemen in 2004, where the long-term mean annual precipitation is
544 mm, total rainfall accrued was about 250 mm. Due to the lack of moisture
and dew, especially in the period when yellow rust appears, yellow rust
infection did not take place. Because climatic conditions were not appropriate,
leaf rust, which was seen extensively in previous years, did not develop
sufficiently (Table 2).
Table 2. The material sets tested for rust diseases in 2004
Nursery
Yellow rust
Leaf rust
R MS S R MS S
Bread Wheat Crossing Block - - - 386 6 5
Bread Wheat Screening Nursery - - - 140 5 3
Durum Wheat Crossing Block - - - 158 30 5
Durum Wheat Screening Nursery - - - 163 10 9
NOTES: R = Resistant; MS = Moderately Susceptible; S = Susceptible.
Table 3. The material sets tested for rust diseases in 2005
Nursery
Yellow rust
0-R MR MS S
Bread Wheat Crossing Block 132 20 53 91
Bread Wheat Screening Nursery 57 4 58 62
Durum Wheat Crossing Block 7 17 10 4
Durum Wheat Screening Nursery 10 5 2 8
NOTES: R = Resistant; MR = Moderately Resistant; MS = Moderately Susceptible; S = Susceptible. Leaf
rust not assessed.