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US Stripe Rust in 2006 US Stripe Rust in 2006
Xianming Chen
April 2, 2007
USDA-ARS, Wheat Genetics, Quality, Physiology, and Disease Research Unit Department of Plant Pathology, Washington State University
Wheat Stripe Rust(Puccinia striiformis f. sp. tritici)
Barley Stripe Rust(Puccinia striiformis f. sp. hordei)
Wheat Stripe Rust Epidemic in the US in 2005Wheat Stripe Rust Epidemic in the US in 2005
Places fromwhich striperust werecollected.
Stripe rustoccurredwithin theregion.
1.515.0
Wheat Yield Losses Caused by Stripe Rust in 2005 (in percentage and million bushels)
2.722.62.46
4.43.242.3
0.445.0
0.531.0
0.071.0
33.788.0
0.040.2
0.265.00.03
1.0
0.602.0
2.894.0
6.815.0
0.040.5
17.8215.2
0.061.0
US Total3.36%73.28 mHttp://www.crl.umn.edu
First Observations of Stripe Rust in Various States in 2006
4/26
3/7 3/20
Colusa3/16
St. Paul
College Station
Baton Rouge
4/23
Plains
Walla2 4/20
Corvallis4/11
Sturtgart4/17
5/13Limestone
Painter5/16
Urbana5/8
Kalispell5/23
Hertford5/17
Weston5/28
Pullman5/31
Clarksville6/1
Pleurina6/5
Wenetah6/9
6/14Fargo
Logan3/16
Yuma3/20
WA
OR ID
MT
NV
WY
UT
AZ NM
OK
KS
SD WI
IA
MO
AR
LA
IL IN
MI
OH
KY
TN
MS AL GA
SC
VA
NC
WV
PA
NY
MDDE
NJ
ME
NHVT
MACT
NC
ND
MN
TX
NE
CO
2000
WA
OR
CA
ID
MT
NV
WY
UT
AZ NM
OK
KS
SD WI
IA
MO
AR
LA
IL IN
MI
OH
KY
TN
MS AL GA
FL
SC
VA
NC
WV
PA
NY
MDDE
NJ
ME
NHVT
MACT
NC
ND
MN
TX
NE
CO
2001FL
WA
OR
CA
ID
MT
NV
WY
UT
AZ NM
OK
KS
SD WI
IA
MO
AR
LA
IL IN
MI
OH
KY
TN
MS AL GA
FL
SC
VA
NC
WV
PA
NY
MDDE
NJ
ME
NHVT
MACT
NC
ND
MN
TX
NE
CO
2002
Barley Stripe Rust
1991
19921992
1992
1993
1993
1993
19941994
1995
1995 Spread in 1991-1995 Distributions
in 2000-06
WA
OR ID
MT
NV
WY
UT
AZ NM
OK
KS
SD WI
IA
MO
AR
LA
IL IN
MI
OH
KY
TN
MS AL GA
SC
VA
NC
WV
PA
NY
MDDE
NJ
ME
NHVT
MACT
NC
ND
MN
TX
NE
CO
2003 - 2006
Trace –20%
Severe (>20%)
Yield Losses Caused by Stripe Rust in the US in 2006
State Percent BushelsArkansas 1.0 189,800California 15.0 2,529,100
Idaho 0.3 164,5003.0 199,000
0.5 172,400Louisiana 2.0 114,700Montana 0.6 498,400
0.1 63,900Oregon 0.2 77,500
0.5 28,900Washington 0.2 238,100
0.5 106,800
CropWinter wheatWinter wheat
Winter wheatDurum wheat
Spring wheatWinter wheatWinter wheatSpring wheatWinter wheatSpring wheatWinter wheatSpring wheat
US Total 0.24 4,383,100All wheat0.05 93,800Barley
http://www.cdl.umn.edu/index.htm
Barley differentialsNo. Cultivar123456789
1011
TopperHeils FrankenEmirAstrixHiprolyVarundaAbed Binder 12TrumpfMazurkaBigoI 5
12 Bancroft
Barley Stripe Rust Races in 2006
Race Virulence US CA WA OR AZPSH Frequency (%)
1 1,2 2.3 6.336 1,4 2.348 1
56 1,5,7,8,12 4.760 1,5,7,8,9,10,12 7.0 6.3
77 1,3,5,7,8,9,10,12 2.3
71 1,3,5,6,7,8,9,10,12 25.6 30.072 1,2,3,4,5,6,7,8,9,10,11,12 2.375 1,2,3,4,5,6,7,8,9,10,12 27.9 20.0
78 1,2,4,5,6,7,8,12 2.3 8.312.5
52 1,5,7,84.72.3
63 1,3,5,7,8,12 2.3
76 1,5,6,7,8,9,10,12 7.0
79 1,2,4,5,7,8,9,10,12 2.3 10.080 1,5,7,10 2.3 6.3
MN
6.312.5
6.320.010.0 25.010.0
31.3 75.0
83.318.8
6.3
81 1,7,10 2.3 100
Races of Puccinia striiformis f. sp. hordeiin Various States in 2006
StateNo. ofIsolate
No. ofRaces PSH Race (and No. of Isolates)
Arizona 12 3 72 (1), 75 (10), 78 (1)California 16 9 36 (1), 48 (2), 52 (1), 60 (1),
71 (5), 76 (3), 77 (1), 80 (1)Oregon 4 2 60 (1), 71 (3)Washington 10 7 56 (2), 60 (1), 63 (1), 71 (1)
75 (2), 76 (3), 79 (1)Minnesota 1 1 81 (1)*
Total 43 16
* This isolate from barley also was identified as PST-123 .
Wheat Stripe Rust Races Identified in 2006
racePST
VirulencesNo. of
samples from
25 1,3,6,8,9,10,12 3 WA35 1,10 5 WA78 1,3,11,12,16,17,18,19,20 1 WA80 1,3,8,11,12,16,17,18,19,20 1 GA98 1,3,8,10,11,12,16,17,18,19,20 2 LA,TX
100 1,3,8,9,10,11,12,16,17,18,19,20 42 16 states101 1,2,3,8,9,10,11,12,16,17,18,19,20 24 CA (23), WA (1)102 1,3,8,9,10,11,12,14,16,17,18,19,20 17 11 states111 1,3,5,8,9,10,11,12,16,17,18,19,20 5 OR, ID, WA
Collected Wheat Differentials
No Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Yr5
Lemhi
Chinese 166
Heines VII
Moro
Paha
Druchamp
Produra
Yamhill
Stephens
Lee
Fielder
Tyee
Tres
Hyak
17 Yr8
18 Yr9
19 Clement
20 Compair
16 Express
No Name
for PST races
114 1,3,4,8,9,10,11,12,14,16,17,18,19,20 29 OR, ID, WA, UT115 1,3,5,8,9,10,11,12,16,17,18,19,20 7 OR, ID, WA116 1,3,4,5,8,9,10,11,12,16,17,18,19,20 1 WA117 1,3,6,8,9,10,11,12,14,16,17,18,19,20 1 OR, WA122 1,2,3,6,8,9,10,11,12,14,16,17,18,19,20 1 CA123 1,3,6,8,9,10,11,12,16,17,18,19,20 2 CA, MN124 1,2,3,12 1 CA125 1,2,8,12 1 CA126 1,2,8,10,12,16 1 CA
No. of No. of State isolates races PST race (and frequncy, %)CA 28 4 100 (7.1), 101 (82.1), 102 (7.1), 122 (3.6)OR 14 6 100 (21.4), 102 (21.4), 111 (7.1), 114 (28.6), 115 (7.1), 117 (14.3)
WA 52 1125 (5.8), 35 (9.6), 78 (1.9), 100 (13.5),101 (3.8),102 (1.9),111 (5.8), 114 (38.5), 115 (7.7), 116 (1.9), 117 (9.6)
ID 10 4 100 (30.0), 111 (10.0), 114 (40.0), 115 (20)UT 5 2 100 (80.0), 114 (20.0)MT 3 2 100 (33.3), 102 (66.7)AL 1 1 100AR 1 1 102GA 11 3 80 (9.1), 100 (72.7), 102 (18.2)IL 1 1 100 (1)IN 3 2 100 (33.3), 102 (66.7)LA 4 3 98 (25.0), 100 (50.0), 102 (25.0)MD 2 2 100 (50.0), 102 (50.0)MN 4 3 100 (50.0), 102 (25.0), 123 (25.0)MO 1 1 102NC 1 1 100TX 1 1 98VA 5 1 100 (100.0)Total 147 18
PST Races and Their Frequencies in Various States in 2006
Total no. of races
US WA
18 11No. of samples 147 52
No. of new races 5 (3.5) 0 (0)Races in old group 2 (5.6) 2 (15.4)Races in new group 16 (94.4) 9 (84.6)
No. of previous races 13 (96.5) 11 (21.2)
PST-100 (29.4) (13.5)PST-114 (20.3) (38.5)PST-101 (16.8) (3.8)
Race Identification of Wheat Stripe Rust in 2006
Predominant races
Number (frequency, %)
PST-102 (11.9) (1.9)PST-115 (4.9) (7.7)PST-111 (3.5) (5.8)
Summary of Races of Puccinia striiformis f. sp. tritici in the US from 2000 to 2006
2000 2001 2002 2003 2004 2005 2006
No. of isolates
No. of races
No. of new races
143
18
5
486
27
6
293
28
6
420
31
10
414
39
9
34
10
184156
42
21
Prevalent races
1st
2nd
3rd
4th
5th
100 (29%)
101 (17%)
114 (20%)
102 (12%)
115 (5%)
100 (33%)
102 (27%)
115 (14%)
114 (3.2%)
116 (3%)
100 (50%)
102 (17%)
101 (4%)
92 (3%)
110 (3%)
100 (33%)
98 (29%)
97 (11%)
78 (6%)
80 (5%)
78 (31%)
97 (11%)
98 (10%)
80 (9%)
20 (5%)
78 (23%)
80 (17%)
67 (8%)
71 (5%)
64 (4%)
80 (12%)
20 (11%)
59 (11%)
58 (11%)
78 (8%)
AcknowledgementsAcknowledgementsK. Burch
C. Cowger
J. Costa
S. Harrison
D. Hole
L Jackson
Y. Jin
M. Johnston
M. Kolding
L. Kolb
D. Long
R. McIntosh
S. Markell
L. Penman
K. Richardson
D. Santra
B. Steffenson
A. Steve
M. Wang
J. Windes
D. Wood
J. YoumansM. Carson
C. Griffey
R. Harrington
