Agriculture Reference
In-Depth Information
(a)
(b)
Fig. 5.1
Changes in fre-
quency (%) of
Puccinia triticina
isolates with virulence to spe-
cifi c leaf rust resistance genes
in different wheat growing
regions of the US. (a) Soft red
winter wheat region—south-
eastern states. (b) Hard red
winter wheat region—Texas
and Oklahoma. (c) Hard red
spring wheat region—Minne-
sota, North Dakota, and South
Dakota.
(c)
