Date: August 15 2006
From: ProMED-mail <promed@promedmail.org> 

In this update (most recent first):

[1] ASR on soybean - Louisiana: 1st report for Natchitoches Parish in 2006
[2] ASR on soybean - Georgia: 1st report for Tift County in 2006
[3] APS 2006 Soybean Rust Symposium: Program Online

[1] ASR on soybean ­ Louisiana: first report for Natchitoches Parish in 2006
Date: 15 Aug 2006
From: ProMED-mail <promed@promedmail.org>
Source: brownfieldnetwork.com [edited]
<http://www.brownfieldnetwork.com/gestalt/go.cfm?objectid=12770A9A-F119-702F-B236838E5110DE79>


The United States Department of Agriculture reports that Asian soybean rust has been confirmed on soybeans in Natchitoches Parish, Louisiana. This is the 1st case of rust in that county in 2006, the northernmost case on [soy-] beans in the state and farthest west Asian soybean rust has been found in [the crop planted for] 2006.

The rust was found in a sentinel plot on Group V beans at the R5 growth stage. According to the Agriculture Department, area producers are advised to use fungicide if the beans are between the R1 and R5 stage and have good yield potential. The USDA states that "harvest has begun in many of the soybean growing areas especially with early maturing varieties or those planted early."

For the year to date, 10 counties in 5 Southeast and Gulf Coast states have reported Asian soybean rust on soybeans, with several recent cases attributed to storm activity during July.

[Byline: John Perkins]

[2] ASR on soybean ­ Georgia: first report for Tift County in 2006
Date: 14 Aug 2006
From: ProMED-mail <promed@promedmail.org>
Source: southeastfarmpress.com [edited]
<http://southeastfarmpress.com/news/081406-georgia-rust/>

Asian soybean rust was confirmed on 7 Aug 2006 on leaves taken from Group IV soybeans growing in an industry research field near Chula in Tift County.

A small leaf sample (<10 leaflets) was submitted to the University of Georgia diagnostic clinic, and rust was confirmed. The Tift County find makes 6 counties in south central Georgia reporting infections.

Tift becomes the 29th county in the U.S. with soybean rust and the northernmost in Georgia in 2006. The positive counties are Brooks, Decatur, Miller and Tift, with Grady and Thomas no longer red on the USDA map after infected plants were destroyed and no more rust found. It is the 9th U.S. county in 5 states with rust on this season's soybeans.

Tift County is the site of the University of Georgia's Tifton campus and a center for row crop research, including soybeans. By comparison, rust was first confirmed at the Tifton campus on 15 Jul 2005.

University of Georgia pathologists say although Asian soybean rust has been confirmed on kudzu in Miller and Brooks counties and on soybean research plots in Brooks and Decatur counties, it has really not spread much at all this year, likely due to hot and dry weather.

University of Georgia Plant Pathologist Bob Kemerait says, "Many growers may choose to wait to apply the fungicide application until we are able to document rust spreading in our sentinel plots and research plots. For example, though rust was found on soybean plants in Attapulgus, Decatur County (1 leaf of 100) on 3 Jul 2006, we have not found the rust again. We have also not found rust in sentinel plots in Moultrie (SunBelt Expo) or elsewhere."

To the west, in Alabama, rust was detected over-wintering in kudzu as far north as Montgomery county in the central part of the state, but has not been reported in soybeans in the state.

To the south, in Florida, rust has been found in both sentinel plots and commercial counties in northwest Florida. Movement has been sporadic at best and researchers have not recommended spraying for soybean rust, unless yield potential of beans warrants.

To the north in South Carolina, spores were found in June, but no rust has been detected in the state and soybean specialist John Mueller says no recommendations have been made for growers to spray beans for rust.

A recent find in southwest Mississippi has not spread from the site in Jackson County. Hot, dry weather throughout most of Mississippi has not been conducive to spread of rust and Extension specialists say soybeans in the Delta and northern Mississippi are not threatened by rust at this time.

Though some scattered rainfall in late July in south and central Georgia brought some relief from the drought, intense heat in August has offset most of the gains. Throughout the southern tier of states, where rust begins its move northward, extended hot, dry weather has severely limited its movement.

[Byline: Roy Roberson]

[3] APS 2006 Soybean Rust Symposium: Program Online
Date: 6 Jul 2006
From: ProMED-mail <promed@promedmail.org>
Source: stopsoybeanrust.com [edited]
<http://www.stopsoybeanrust.com/viewStory.asp?StoryID=874>

Details of the technical program planned for the 2006 National SoybeanRust Symposium 29 Nov - 1 Dec 2006, in St. Louis are now available online <http://www.apsnet.org/online/SBR/>.

The technical committee, co-chaired by Anne Dorrance of Ohio State University and John Rupe of the University of Arkansas, has lined up a packed program. Don Hershman, University of Kentucky, is the overall coordinator for the symposium, which is presented by the American Phytopathological Society [APS] in cooperation with related organizations and sponsors.

The first morning's general session (30 Nov 2006) will be overviews of soybean rust in 2006 from 4 areas: North America, South America, Mexico and the Caribbean. This is followed by results from this year's soybean rust control studies.

The afternoon offers 2 sets of breakout sessions with multiple presenters. The 1st session choices are biology of soybean rust; economics and policy; epidemiology and host response. The second sessions are application technology; disease management; forecasting; and monitoring.

The 2nd morning is filled with varying takes on the present soybean rust situation, followed by discussion of the long-term perspectives on soybean rust. The symposium ends at noon 1 Dec 2006.

Participants who register by 20 Oct 2006, event at the Adam's Mark Hotel in St. Louis receive an early registration discount. To register, download and complete the registration form [from the URL above]. The symposium Web site will carry the latest event information and has a place to sign up for symposium updates.

Source: News release and Web-site information from the American Phytopathological Society.

[Byline: Marilyn Cummins]

--
ProMED-mail
<promed@promedmail.org>

[Asian soybean rust (ASR) is a plant disease caused by the fungus _Phakopsora pachyrhizi_ and was introduced into the USA in 2004. In addition to the crop plant soybean (_Glycine max_), cowpeas, green beans, and other edible legumes could be affected by the ASR pathogen which causes defoliation and yield reduction. Kudzu (_Pueraria lobata_, a.k.a. Japanese arrowroot) is an important alternate host for the pathogen in southern states of the USA.

New detections reported in this posting of ASR in specific counties in Louisiana and Georgia bring to 10 the number of counties in the USA where ASR has been reported on soybean, mostly in sentinel and other test plots. There is still no major outbreak to report in commercial fields. Dry weather seems to be holding the disease in check in 2006 and preventative fungicide applications are probably less than in 2005 so far.

The USDA national commentary recaps on 15 Aug 2006 that: "Currently rust has been found on this year's soybeans in 10 different counties in 5 states (AL,FL,GA,LA,MS), the rest of the finds have been on kudzu. A total of 30 counties have reported rust this year and include 5 in Alabama, 13 in Florida, 6 in Georgia, 4 in Louisiana, one in Texas, and one in Mississippi."

The American Phytopathological Society is organizing a Symposium on ASR in November, as it did in 2005. Information on the program and registration are at <http://www.apsnet.org/online/SBR/>

Maps:
Asian soybean rust outbreaks 2006
<http://www.sbrusa.net>

Pictures:
<http://www.dtnsoybeanrustcenter.com/index.cfm?show=65&mid=60&page=ALL>

Diagnosis cards (broadband best)
<http://www.aphis.usda.gov/lpa/issues/sbr/SBR_IDcard_11-04.pdf>

Links:
<http://www.sbrusa.net>

National commentary, updates from states, maps, chronology.
<http://www.stopsoybeanrust.com/mc_home.asp>

Latest news, articles, maps and tracking information.
<http://www.dtnsoybeanrustcenter.com/index.cfm?show=10&mid=31>

Latest news, articles and other information.
<http://www.stopsoybeanrust.com/mc_resources.asp>

More links on ASR.
<http://www.apsnet.org/online/SBR/>
- Mod JAD]

[see also in the archive:
Soybean rust, Asian strain update 2006 (09): USA 20060802.2143 Soybean rust, Asian strain Update 2006 (08): USA 20060711.1898 Soybean rust, Asian strain update 2006 (07): USA 20060703.1830 Soybean rust, Asian strain update 2006 (06): USA 20060616.1667 Soybean rust, Asian strain update 2006 (05): USA 20060612.1642 Soybean rust, Asian strain update 2006 (04): USA 20060518.1402 Soybean rust, Asian strain update 2006 (03): USA 20060226.0622 Soybean rust, Asian strain update 2006 (02): USA 20060221.0568 Soybean rust - Mexico: 1st report 20060219.0546 Soybean rust, Asian strain update 2006 20060214.0482 Soybean rust, Asian strain - USA (GA) 20060208.0415 ProMED-Plant Disease Report: July - December 2005 20060201.0331
2005
----
Soybean rust, Asian strain - USA: 2005 disease summary 20051228.3694 Soybean rust, Asian strain - USA (KY)(02): confirmed 20051219.3640 Soybean rust, Asian strain - USA (multistate) (10) 20051218.3628 Soybean rust, Asian strain - USA (KY): 1st report 20051123.3404 Soybean rust, Asian strain, kudzu control 20051006.2914 Soybean rust, Asian strain - USA (GA)(05) 20051005.2902 Soybean rust, Asian strain - USA (AL)(03) 20050826.2528 Soybean rust, Asian strain - USA (SC) 20050818.2414 Soybean rust, Asian strain - USA (FL)(03) 20050815.2386 Asian soybean rust, Asian strain - USA (multistate) 20050724.2133 Soybean rust, Asian strain - USA (AL) 20050715.2029 Soybean rust, Asian strain - USA (multistate) 20050702.1868 Soybean rust, Asian strain - USA (LA) 20050624.1769 Soybean rust, Asian strain - USA (GA) 20050505.1245 Soybean rust, Asian strain - USA (GA) 20050429.1196 Soybean rust, Asian strain - USA (FL): 1st report 2005 20050309.0693]