News

2016 Growing Season

Stripe Rust Update, April 13, 2016

Xianming Chen Stripe Rust in the Pacific Northwest On April 7, I was checking wheat fields in Whitman, Garfield, Walla Walla, and Franklin counties of Washington and Umatilla County of Oregon.  Winter wheat ranged from ...

Stripe Rust Update, March 31, 2016

Xianming Chen Wheat stripe rust in Washington Yesterday, we were checking wheat fields in Whitman, Lincoln, Adams, and Franklin counties in eastern Washington.  Winter wheat ranged from Feekes 2 to 6.  With the good moisture ...

Stripe Rust Forecast and Update, March 4, 2016

Xianming Chen Severe stripe rust forecasted for the eastern Pacific Northwest Based on our forecast models using the weather conditions from November 2015 to February 2016, stripe rust will potentially cause yield loss of 53% ...

2015 Growing Season

Stripe Rust Update, June 25, 2015

Xianming Chen Stripe rust in Washington Based on field observations in this week, winter wheat ranged from milk to ready to harvest and spring wheat from heading to soft dough stage depending upon locations.  We ...

Stripe Rust Update, June 11, 2015

Xianming Chen Stripe rust in eastern Washington We were checking wheat and barley fields in eastern Washington yesterday and today.  Winter wheat ranged from flowering (Feekes 10.5) to dough stage (Feekes 11), and spring wheat ...

Stripe Rust Update, May 21, 2015

Xianming Chen Stripe rust in the PNW Yesterday, we were checking wheat and barley fields in eastern Washington.  Winter wheat ranged from late jointing (Feekes 8) to flowering (Feekes 10.5) and mostly in boot to ...

Stripe Rust Update April 29, 2015

Xianming Chen Stripe Rust Occurring in the Palouse Region Stripe rust was first observed as a single rusting leaf in the susceptible spreader rows in one of our winter wheat experiment field on Whitlow Farm ...

Stripe Rust Update, April 10, 2015

Xianming Chen Stripe Rust in the PNW We were checking wheat fields in Washington and northeastern Oregon on April 9, 2015.  Winter wheat ranged from early jointing (Feekes 4) to late jointing (Feekes 9), and ...

Stripe Rust Forecast and Update, March 5, 2015

Xianming Chen Stripe rust forecast for the eastern Pacific Northwest Based on our forecast models using the weather conditions from November 2014 to February 2015, stripe rust will be likely severe (40-60% yield loss on ...

First Forecast of Stripe Rust for 2015 and 2014 Yield Losses

January 8, 2015 Xianming Chen Forecast for 2015 The current forecast is that highly susceptible winter wheat varieties would have 38% yield loss, in the high end of moderate epidemic range (20-40% yield loss).  Based ...

2014 Growing Season

Stripe Rust Update July 3, 2014

Stripe Rust Update July 3, 2014 Xianming Chen Stripe rust in the Palouse region I was check fields in the Palouse region (Whitman and Spokane counties of Washington and Latah County of Idaho.  Winter wheat ...

Stripe Rust Update 5/23/2014

Stripe Rust Update, May 23, 2014 Xianming Chen Wheat Stripe Rust in the Pacific Northwest On May 21, I was checking fields in the Palouse region including Whitman County of Washington and Latah County of ...

Stripe Rust Update 4/25/14

Xianming Chen - April 25, 2014 Eastern PNW On April 23, we were checking wheat fields in Whitman, Garfield, Columbia, Walla Wall, Benton, Franklin, Grant, Douglas, and Lincoln counties in Washington State. Winter wheat ranged ...

Stripe Rust Forecast and Update 3/13/14

March 13, 2014 - Xianming Chen Prediction of potential stripe rust damage for the PNW Using a series of forecast models (Sharma-Poudyal and Chen, Phytopathology 101:544-554, 2011) based on various weather parameters from November, 2013 to ...

First Forecast of Stripe Rust for 2014 Wheat Crop

January 3, 2014 - Xianming Chen Happy New Year! As we are heading into 2014, you may be wondering how bad stripe rust is going to be in the coming season. The good news is that ...

2013 Growing Season

Rust Update 8/9/13

August 9, 2013 Xianming Chen Rusts in the PNW Wheat stripe rust. As winter wheat crop has been harvesting and spring crop reached dough stage, the rust season is basically over. Stripe rust was active ...

Rust Update 6/27/13

June 27, 2013 Xianming Chen Stripe rust in the Pacific Northwest The large-scale and good amount of precipitation from last week to yesterday in eastern Washington, eastern Oregon, and northern Idaho has stopped the drought ...

Rust Update 5/24/13

May 24, 2013 Xianming Chen Stripe rust in the Palouse region of Washington and Idaho Yesterday, I was checking wheat fields in the Palouse region of Washington and Idaho. Winter wheat ranged from jointing (Feeks ...

Stripe Rust Update 5/3/13

May 3, 2013 Xianming Chen Wheat stripe rust in Washington and Northeastern Oregon We were checking wheat fields in Washington and northeastern Oregon on April 30 – May 3. Winter wheat ranged from Feeks 5 ...

Stripe Rust Update 4/4/13

April 4, 2013 Xianming Chen Wheat stripe rust in Washington We were check wheat fields in Whitman, Adams, Lincoln, Franklin, and Benton counties in eastern Washington, along Highways 23 and 21, the border of Adams ...

Stripe Rust Forecast and Update 3/8/13

March 8, 2013 Xianming Chen Field survey in Washington On March 7, we were checking wheat fields in Whitman, Columbia, Walla Walla, Benton, Franklin, and Adams counties in eastern Washington. Winter wheat plants ranged from ...

First Forecast of Stripe Rust for the Pacific Northwest in 2013

January 2, 2013 Xianming Chen Based on the 2012 December temperatures, stripe rust yield loss on highly susceptible winter wheat cultivars is predicted to be 41%, which is lower than 47% predicted for 2012 based ...

2012 Growing Season

Stem Rust Update and Recommendations 8/13/12

August 13, 2012 Xianming Chen Stem rust survey Stem rust of wheat and barley has been widespread in eastern Washington and northern Idaho (Fig.1 and Fig. 2). The disease has been the most severe, especially ...

Stripe Rust Update 7/27/12

July 27, 2012 Xianming Chen Stripe rust on winter wheat The stripe rust season is basically over, but stem rust and leaf rust have become a problem in eastern Washington and northern Idaho. On July ...

Stripe Rust Update 6/28/12

June 28, 2012 Xianming Chen Stripe rust on winter wheat Winter wheat has generally passed flowering stage with some fields close to maturity and the stripe rust management season has been basically over in eastern ...

Stripe Rust Update 6/8/12

June 8, 2012 Xianming Chen Stripe rust is developing in Washington and northern Idaho Over the past two weeks since the last update on May 23, stripe rust has developed to significant levels in south-central, ...

Stripe Rust Update 5/23/12

May 23, 2012 Xianming Chen Wheat Stripe Rust in eastern Washington and eastern Oregon Yesterday, I was checking wheat fields in Whitman, Columbia, Walla Walla, Benton, Franklin, and Adams counties of Washington and the Pendleton ...

Stripe Rust Forecast and Update 4/24/12

April 24, 2012 Xianming Chen Stripe Rust in the Western U.S. In the Pacific Northwest (PNW), stripe rust this year has been much lower than the rust development in 2011, except for northwestern Washington, stripe ...

Stripe Rust Update 4/4/12

April 4, 2012 Xianming Chen Stripe rust found in eastern Washington and Management Recommendation Yesterday (April 3) was the second nice spring day in much of the eastern Washington and the weather was back to ...

Stripe Rust Forecast and Update 3/5/12

March 5, 2012 Xianming Chen Field survey On March 1, I was checking wheat fields in Whitman, Columbia, Walla Walla, Benton, and Franklin counties in Washington, mostly south of Highway 26. Plants ranged from two-leaf ...

First Forecast of Stripe Rust for the Pacific Northwest in 2012

Jan 2, 2012 Xianming Chen Based on the 2011 December temperatures, stripe rust yield loss on highly susceptible winter wheat cultivars is predicted to be 47%. The value is calculated using the formula Y (yield ...

Stripe Rust Fall Infection in the PNW 11/4/11

Nov 4, 2011 Xianming Chen On November 3, we were checking stripe rust infection in winter wheat fields along Highway 23, Platter Rd, Doerschlag Rd, Lake Rd, Stromberger Rd, and Danekas Rd in Whitman, Adam, ...

2011 Growing Season

Rust Update 6/23/11

June 23, 2011 Xianming Chen Wheat stripe rust With the relatively warm weather in the last couple of weeks, stripe rust of wheat has developed fast in most part of the PNW, especially in the ...

Rust Update 5/20/11

May 20, 2011 Xianming Chen We were checking wheat fields yesterday in Latah county, ID and Whitman, Adam, Lincoln, and Grant countries, WA along highways 95, 27, 271, Pine City-Malden, 23, Mohler Rd, 28, 17, ...

Rust Update 4/15/11

April 15, 2011 Xianming Chen Yesterday, I was checking stripe rust in wheat fields in northern Idaho and eastern and central Washington. Only a few spring wheat fields have been planted and some with plants ...

Rust Update 3/18/11

March 18, 2011 Xianming Chen Stripe rust has survived the cold February and started actively growing in many locations in the southeastern and central Washington. Yesterday, we checked wheat fields in counties of Garfield, Columbia, ...

Stripe Rust Starts Developing in the Pacific Northwest 2/18/11

February 18, 2011 Xianming Chen Stripe rust of wheat has waked up much earlier this year than last year in the Pacific Northwest and may not have slept in the western Oregon and western Washington. ...

Rust Update 11/10/10

November 10, 2010 Xianming Chen With the weather conditions, warm and moist, so far this fall, we expect to see stripe rust in early planted winter wheat fields. Yesterday, we were checking fields in the ...

2010 Growing Season

Significant Stem Rust in the Palouse Region 8/18/10

August 19, 2010 Xianming Chen Wheat stem rust occurred again in the Palouse region (Whitman Co. of Washington and Latah Co. of Idaho) this year. As reported previously, the barberry bushels near Potlatch, Idaho (Latah ...

Some Issues Related to Stripe Rust in the PNW 7/8/10

July 8, 2010 Xianming Chen Currently, there are some issues on stripe rust The rust season has not been over yet. As hot and dry weather has finally come to the PNW, high-temperature adult-plant resistance ...

Rust Update 7/2/10

July 2, 2010 Xianming Chen Stripe Rust of Wheat With the majority of fields have been sprayed with fungicides, winter wheat crops have reached stages by which fungicides may no longer be applied. Head infection ...

Rust Update 6/18/10

June 18, 2010 Xianming Chen Stripe Rust of Wheat As winter and spring wheat crops are progressing, fungicide application for control stripe rust on winter wheat crop has almost reached the end and has started ...

Stripe Rust Update and Recommendations 6/8/10

June 8, 2010 Xianming Chen We were checking wheat and barley fields in Garfield, Columbia, Whitman, and Spokane counties in Washington and Latah County in Idaho yesterday and today. Stripe rust was widespread. Infection of ...

Rust Alert 6/4/10

Rust Alert June 4, 2010 Xianming Chen This is an urgent alert on stripe rust for wheat growers in eastern Washington, eastern Oregon, and northern Idaho. In the past week, there were many reports of ...

Rust Update 5/20/10

May 20, 2010 Xianming Chen Stripe rust shows up in the Palouse Region Yesterday, we were checking for stripe rust in the Palouse region (Whitman County, southeastern WA). Winter wheat was in the middle of ...

Rust Update 4/17/10

April 17, 2010 Xianming Chen Rusts in western Washington We completed the first rust note-taking for the winter nurseries at Mt. Vernon on April 14. Wheat and barley were in mid jointing stage (Feekes 6-7). ...

Rust Update 4/29/10

April 29, 2010 Xianming Chen Stripe rust starts developing in Walla Walla. Today, I was checking wheat fields in the Connell (Franklin County), Horse Heaven Hills (Benton County), and Walla Walla (Walla Walla County) areas. ...

Stripe Rust Update in Washington 3/19/10

March 19, 2010 Xianming Chen No stripe rust found in eastern Washington On March 16, I was checking wheat fields in Walla Walla, Horse Heaven Hills, and Kahlotus areas in eastern Washington and did not ...

2009 Growing Season

Stripe Rust Is Developing in Spring Wheat Fields 7/2/09

July 2, 2009 Stripe rust was found in commercial fields of spring wheat in the Dayton area and the Palouse region. Although rust incidences were generally low (1-5%), rust pustules were very actively producing spores. ...

Rust Update 6/26/09

June 26, 2009 Xianming Chen The Pacific Northwest (PNW) Wheat stripe rust has developed quite rapidly in the Palouse region (Whitman County of Washington and Latah County of Idaho) since it was first observed near ...

Update of Stripe Rust and Other Wheat Diseases 5/21/09

May 21, 2009 Xianming Chen I was checking wheat fields in eastern Washington and northeastern Oregon on May 19 and 20. Winter wheat crop in the Palouse area (Whitman County, WA) was in jointing stages ...

Stripe Rust Found in Horse Heaven Hills and Walla Walla 4/17/09

April 17, 2009 Xianming Chen Yesterday, I was checking wheat fields in the Connell and Horse Heaven Hills areas (south-central Washington). Winter wheat crop ranged from early tillering (FS 2) to middle jointing (FS 6). ...

2008 Growing Season

Stripe Rust Update 7/2/08

July 2, 2008 Xianming Chen Stripe rust has still taken a slow pace for developing in the Pacific Northwest due to the low temperatures before mid June and the recent dry and hot weather conditions. ...

Stripe Rust Update 6/17/08

June 17, 2008 Xianming Chen The heavy snow in the Palouse region in the morning of June 10 signified the unusually cool weather conditions by then in the Pacific Northwest (PNW). Since then, it has ...

Stripe Rust Update 6/4/08

June 4, 2008 Xianming Chen With the frequent precipitations since the middle of May, wheat and barley crops have been growing much better throughout eastern Washington, northeastern Oregon and northern Idaho. Today, I was checking ...

Rust Update 4/30/08

April 30, 2008 Xianming Chen I was checking fields in Central Ferry, Walla Walla, Horse Heaven Hills, and Connell areas yesterday. Stripe rust has become easy to find in the Horse Heaven Hills area. Some ...

Stripe Rust Update 4/9/08

April 9, 2008 Xianming Chen Stripe rust in eastern Washington Spring is taking baby steps to come to the Pacific Northwest. The Palouse region in eastern Washington, especially the Pullman campus of Washington State University, ...

2007 Growing Season

2007 Rust Summary

July 13, 2007 Xianming Chen Due to the hot and dry weather conditions in the first two weeks of July, the stripe rust season in most part of the Pacific Northwest is almost over. Similar ...

Differentiation of Physiological Leaf Spot from Stripe Rust and Other Diseases

June 17, 2007 Xianming Chen and Richard Koenig Recently, physiological leaf spot (PLS) has been showing up in some winter and spring wheat fields. I have heard that people mistreated PLS as stripe rust and ...

Stripe Rust Update 6/8/07

June 8, 2007 Xianming Chen Yesterday, I was checking wheat fields in the Othello and Lind areas in Adams county and Whitman county. With the recent moist and cool weather conditions, both winter wheat and ...

Stripe Rust Update 5/17/07

May 17, 2007 Xianming Chen I was checking wheat fields and experimental nurseries on May 16 and 17 in Whitman, Garfield, Columbia, Walla Walla, Benton, Franklin, and Adams counties in Washington. Winter wheat crop ranged ...

Stripe Rust Update 4/20/07

April 20, 2007 Hello, everyone: When we were driving back from Mt. Vernon after planting spring nurseries on April 20, we checked winter wheat fields along HW 26. We found one leaf with stripe rust ...

Stripe Rust Alert 4/17/07

April 17, 2007 Xianming Chen Wheat stripe rust is developing in Horse Heaven Hills Today, I was checking wheat fields in the Horse Heaven Hills. Winter wheat crop ranges from stage 4 to 6. Stripe ...

2006 Growing Season

Stripe Rust Update

June 20, 2006 Xianming Chen It is time to check your wheat fields for stripe rust. The pathogen is widespread in eastern Pacific Northwest. By June 16, stripe rust reached 30% of severity on susceptible ...

Wheat Stripe Rust Starts Developing in the Palouse Region

May 31, 2006 Xianming Chen As I was checking wheat fields in the Palouse region today, winter wheat ranged from early boot to heading stages. I found stripe rust on susceptible wheat entries in our ...

Stripe Rust Update

May 17, 2006 I was checking wheat fields on May 15 and 16 in eastern Washington, northern Idaho, and northeastern Oregon. Winter crops varied from the stem elongation stage to flowering. Spring crops varied from ...

Stripe Rust Update

April 23, 2006 Xianming Chen As we were checking wheat fields on April 20, we found stripe rust in Horse Heaven Hills and Walla Walla. In both areas, stripe rust was just starting in early ...

Rust Update in California, Oregon, and Washington

April 14, 2006 Xianming Chen Dr. McIntosh (from the Plant Breeding Institute, University of Sydney, Australia) and I were checking rusts on wheat, barley, and grasses in California, Oregon and Washington from April 8 to ...

Stripe Rust Forecast for the Pacific Northwest

March 12, 2006 As the spring is around corner, many of you may be wondering if we will have stripe rust problem this year. We have conducted stripe rust forecast using predication models based on ...

2005 Growing Season

Stripe Rust Update

April 18, 2005 Wheat stripe rust has been reported in Texas, Louisiana, Arkansas, Oklahoma, Kansas, Alabama, California, Oregon, and Washington. In the first week of April, susceptible entries had severity levels of 100% in stripe ...

Stripe Rust Update

June 23, 2005 Xianming Chen The spring wheat crop, ranging from boot to flowering stage, reaches the critical time for fungicide application. Many fields of spring wheat have already sprayed with fungicides. If a field ...

Cereal Disease Update

June 17, 2005 Winter wheat is maturing from northeastern Oregon to central Washington, and ranges from milk to soft dough stages in eastern Washington and northern Idaho. Spring wheat ranges from late stem elongation stage ...

Stripe Rust Alert

May 18, 2005 Xianming Chen Wheat stripe rust is almost everywhere in the Pacific Northwest and barley stripe rust starts showing up in eastern Washington. I was checking fields for rust yesterday mainly in Whitman ...

Stripe Rust Update

May 5, 2005 Xianming Chen Wheat stripe rust is widely present in the Pacific Northwest and is severely damaging susceptible winter wheat crops in the Willamette Valley, Oregon and the Horse Heaven Hill, Washington. Yesterday, ...

Stripe Rust Alert

April 21, 2005 Xianming Chen Stripe rust is developing rapidly in the Pacific Northwest Thanks to the good moisture in the past three weeks. The winter wheat crop looks good throughout south central and southeastern ...

2004 Growing Season

Stripe Rust Is Developing on Winter Wheat in Central Washington and Northeastern Oregon

May 6, 2004 Xianming Chen Stripe rust started showing up in the last week of April on winter wheat in experimental plots near Hermiston (Umatilla County), Oregon and in commercial fields near Connell (Franklin and ...

Stripe Rust Update and Fungicide Application

June 16, 2004 Xianming Chen Wheat stripe rust is now almost everywhere in Washington, western and northeastern Oregon, and northern Idaho with various severity levels. I was checking commercial fields in Whitman and Spokane county ...

Rust Update 6/3/04

June 3, 2004 Xianming Chen With frequent rains/showers in the last three weeks, wheat crops look much better in central and eastern Washington and Idaho. The favorable weather conditions also have made stripe rust develop ...

Wheat Stripe Rust Is Severe in ‘Hatton’ Fields in Central Washington and Starts Developing in the Palouse Region

June 3, 2004 Xianming Chen With frequent rains/showers in the last three weeks, wheat crops look much better in central and eastern Washington and Idaho. The favorable weather conditions also have made stripe rust develop ...

Stripe Rust Update 4/14/04

April 14, 2004 Xianming Chen The Pacific Northwest Stripe rust is developing on winter wheat and barley in experimental nurseries in Mt Vernon, Washington and Corvallis, Oregon. Stripe rust also was found in commercial winter ...

Stripe Rust Update 3/12/04

March 12, 2004 Xianming Chen In northwestern Washington, winter wheat crops are in late tillering to early jointing stage. Stripe rust is developing in our rust nurseries in Mt. Vernon and commercial fields in Skagit ...

2003 Growing Season

Stripe Rust on Volunteer Plants in Winter Wheat Fields 6/25/03

June 25, 2003 Xianming Chen Stripe rust is widely occurring in spring wheat fields planted with susceptible varieties in eastern Washington and Northern Idaho. Some fields have been sprayed with fungicides. The recent dry conditions ...

Time to Watch Closely on Spring Wheat Fields for Stripe Rust and Apply Fungicides

June 13, 2003 Xianming Chen Stripe rust is developing rapidly in susceptible spring wheat fields in eastern Washington. On June 12, various levels of stripe rust were found in spring wheat fields in Adams and ...

Stripe Rust Update 5/30/03

May 30, 2003 Xianming Chen Keynotes in this report Stripe rust is developing quickly on susceptible hard red winter wheat in the Palouse region. The club wheat ‘Edwin’ has stripe rust not seen before. Barley ...

Stripe Rust is Developing on Irrigated Spring Wheat 5/16/03

May 16, 2003 Xianming Chen Since stripe rust was first observed on spring wheat in eastern Washington on May 8, the disease has been developing rapidly in irrigated spring wheat fields. In several irrigated spring ...

Stripe Rust Update 5/9/03

May 9, 2003 Xianming Chen On May 8, I was checking fields for stripe rust in Whitman, Garfield, Columbia, Walla Walla, and Adams counties along Highway 26, 127, 12, 395, 260, 17, and 21. I ...

Stripe Rust is Developing on Susceptible Winter Wheat in Franklin County 4/26/03

April 26, 2003 Xianming Chen I was checking wheat fields for stripe rust in southeastern Washington and northeastern Oregon on April 25. Stripe rust is developing on susceptible winter wheat varieties such as ‘Hatton’ in ...

Stripe Rust Update 3/25/03

March 25, 2003 Xianming Chen Wheat stripe rust is developing in Texas, Louisiana, California, and western Washington. In Texas, severe stripe rust epidemic is widespread. The major cultivars, especially ‘Coronado’ that is grown about 80-90% ...

2002 Growing Season

Stripe Rust Update 6/13/02

Dear everyone: Whether wheat stripe rust (Puccinia striiformis f. sp. tritici) will cause problems on barley and barley stripe rust (P. striiformis f. sp. hordei) will cause problems on wheat is a very interesting topic. ...

2001 Growing Season

Stripe Rust Summary 2001

Wheat Stripe Rust Southeastern This year, wheat stripe rust reported in a southern Georgia nursery for the first time since 1974. On May 9, a wheat stripe rust focus 1m in diameter, was found in ...