Wheat Rusts

Stem Puccinia graminis

StripeP. striiformis

LeafP. triticinaP. Recondita f.sp. secalis

U.S. Wheat - 1998

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Puccinia Pathway

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Overwintering

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35

30

National Atmospheric Deposition ProgramNTN Sites in the Central United States in 2004

Wheat Stem Rust

2004

April

1-week rain samples

11-18 May

through

22–27 July

May 18

Wheat Stem Rust

2004

May 25

Wheat Stem Rust

2004

June 01

Wheat Stem Rust

2004

June 08

Wheat Stem Rust

2004

June 15

Wheat Stem Rust

2004

June 22

Wheat Stem Rust

2004

June 29

Wheat Stem Rust

2004

July 06

Wheat Stem Rust

2004

July 13

Wheat Stem Rust

2004

July 20

Wheat Stem Rust

2004

July 27

Wheat Stem Rust

2004

July 29

Wheat Stem Rust

2004

Mead, NE,

NADP/NTN

Site – NE15

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

Conditions: heavy rain (1.90 inches, moderate

spore deposition)

NOAA ARL HYSPLIT Model

http://www.arl.noaa.gov/ready/hysplit4.html

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

T minus 12 hrs

NOAA ARL HYSPLIT Model

http://www.arl.noaa.gov/ready/hysplit4.html

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

T minus 24 hrs

NOAA ARL HYSPLIT Model

http://www.arl.noaa.gov/ready/hysplit4.html

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

T minus 36 hrs

NOAA ARL HYSPLIT Model

http://www.arl.noaa.gov/ready/hysplit4.html

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

T minus 48 hrs

NOAA ARL HYSPLIT Model

http://www.arl.noaa.gov/ready/hysplit4.html

Back trajectoryinitialization time (T)

23 May 2004 2:00GMT

T minus 60 hrs

Source

Region

Soybean Rust – 2005

(9 states – 138 counties)

ObjectiveObjectiveDetect Asian Soybean Rust Detect Asian Soybean Rust ((Phakopsora pachyrhiziPhakopsora pachyrhizi) spores) sporesin rain samples using a real-timein rain samples using a real-timepolymerase chain reaction assaypolymerase chain reaction assay

Cooperative ProjectCooperative ProjectAgricultural Research Service – Cereal Disease LabAgricultural Research Service – Cereal Disease Lab

National Atmospheric Deposition ProgramNational Atmospheric Deposition Program

SponsorsSponsorsUSDA – Agricultural Research ServiceUSDA – Agricultural Research ServiceUnited Soybean BoardUnited Soybean BoardNational Atmospheric DepositionNational Atmospheric Deposition ProgramProgram

Soybean Acreage – 2004

(percentage by county)

Kudzu Acreage

(percentage by county)

Note: red lines indicate frequency of occurrence of year-round temperatures above 28F

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S --

O K

Y U

B + D

E Z

A U

N --

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Asian Soybean Rust, 2006

110 National Atmospheric Deposition Program (NADP) National Trends Network (NTN) sites in

this study

► samples filtered in entirety at NADP Central Analytical Laboratory

► filters desiccated, sealed in Petri dishes, and sent to Cereal Disease Lab (CDL)

► filters sonicated at CDL to remove spores

► CDL tests for Phakopsora pachyrhizi using nested real-time qPCR

► positive assay indicates presence of P. pachyrhizi spores in rain

Asian Soybean Rust, 2006

This map displays counties where P. pachyrhizi was detected in soybean or other legumes between January and the week ending 6 June. The map also displays where spores were detected in rain samples collected 3 weeksprior to the week ending 6 June (i.e., in rain occurring between 9 & 30 May).

06 June

Asian Soybean Rust, 2006

31 Jan

Asian Soybean Rust, 2006

28 Feb

Asian Soybean Rust, 2006

31 Mar

Asian Soybean Rust, 2006

30 May

Asian Soybean Rust, 2006

27 Jun

Asian Soybean Rust, 2006

4 Jul

Asian Soybean Rust, 2006

11 Jul

Asian Soybean Rust, 2006

18 Jul

Asian Soybean Rust, 2006

25 Jul

Asian Soybean Rust, 2006

1 Aug

Asian Soybean Rust, 2006

8 Aug

Asian Soybean Rust, 2006

15 Aug

Asian Soybean Rust, 2006

22 Aug

Asian Soybean Rust, 2006

29 Aug

Asian Soybean Rust, 2006

5 Sep

Asian Soybean Rust, 2006

12 Sep

Asian Soybean Rust, 2006

19 Sep

Asian Soybean Rust, 2006

26 Sep

Asian Soybean Rust, 2006

3 Oct

Asian Soybean Rust, 2006

10 Oct

Asian Soybean Rust, 2006

17 Oct

Asian Soybean Rust, 2006

24 Oct