May 18, 2006
From: ProMED-mail<promed@promedmail.org>
In this update:
[1] ASR returns on kudzu
in Florida
[2] ASR cell phone alerts
[3] Update to public ASR Web site
[4] ASR predictions for 2006
[5] ASR 2006 Symposium, APS
[1] ASR returns on
kudzu in Florida
Date: 17 May 2006
From: ProMED-mail <promed@promedmail.org>
Source: stopsoybeanrust.com [edited]
<http://www.stopsoybeanrust.com/viewStory.asp?StoryID=815>
Florida officials today [17 May 2006] are reporting that they
once again have positive finds of ASR on kudzu in the northern
part of the state. "We have had several days of rain after a
prolonged dry period, and we expect the disease to continue to
increase if the rains continue," the state commentary on
<http://www.sbrusa.net> said. "We also are having higher
humidity and a lot of dew, which will encourage disease as well.
The kudzu canopy is fully developed but not flowering yet. All
of the soybean sentinel plots are still negative."
Several dry weeks since the middle of February 2006 had caused
the rust, known to have been present in 11 Florida counties this
year, to go dormant.
Officials reported they had not been able to find soybean rust
in north Florida in recent weeks, and no new counties with rust
were listed with today's report.
Soybean rust was confirmed on kudzu in Alachua, Duval, Gadsden,
Hernando, Hillsborough, Lee, Leon, Marion, Miami-Dade, Pasco and
Polk counties in Florida in 2006 thus far, with 7 of the 10
finds reported on 17 Jan; one on 20 Jan (Marion) and the most
recent on 13 Feb in Miami-Dade, a full 3 months ago.
Source: Florida state commentaries on <http://www.sbrusa.net>;
the NAPDFC Soybean Rust Forecast site.
[byline: Marilyn Cummins]
[2] ASR cell phone
alerts
Date: 10 May 2006
From: ProMED-mail <promed@promedmail.org>
Source: stopsoybeanrust.com and American Soybean Association
[edited] <http://www.stopsoybeanrust.com/viewStory.asp?StoryID=807>
Members of the American Soybean Association can track the spread
of soybeanrust by cell phone from inside the cab of their
tractor or truck this year with a new mobile rust alert service.
Through <http://www.SoyRAP.com>, ASA's online resource for
soybean rust news and information, ASA members can register for
free to receive a brief call when the USDA confirms soybeanrust
in a nearby region. Subscribers may designate one or more of 5
regions for their alerts.
The SoyRAP.com mobile rust alert service is an exclusive ASA
member benefit that is designed to help soybean growers manage
rust. Non-ASA members can sign up for the service for USD 25.
SoyRAP.com is sponsored by BASF Corporation, Bayer CropScience
and Syngenta Crop Protection. The mobile soybeanrust alert
service will begin on Fri 2 Jun 2006 and conclude on Fri 15 Sep
2006.
[3] Update to public
ASR website
Date: 2 May 2006
From: ProMED-mail <promed@promedmail.org>
Source: stopsoybeanrust.com [edited]
<http://www.stopsoybeanrust.com/viewStory.asp?StoryID=800>
The USDA public soybean rust Web site is now the "USDA Public
PIPE Mapping Web site," and it's not just for rust anymore.
PIPE stands for the new Pest Information Platform for Extension
and Education, the creation of which was announced in late
October 2005, when the USDA announced renewed funding to expand
and refine the soybean rust tracking effort -- and more.
The "and more" came to pass [on 1 May 2006], when the platform's
new pest-specific interface for soybean aphids and many new
features and tools for the soybean-rust interface were added.
Now both soybean rust and soybean aphids will be tracked at <http://www.sbrusa.net>,
in a system and format with room to add more crops and more
pests in the future. For now, the one category of host plants
being monitored is called "legumes/kudzu,"
which, of course, emphasizes soybeans as before.
The web address stays the same; but "USDA Public PIPE Website"
is what will show in your browser heading and lists.
"Getting Started" is the first place to head when you get to the
new PIPE site -- click on the small gray box in the upper left
corner. There is so much new information and so many new tools
on the site that the "Getting Started" documents print out as
nearly 5 pages each, double-spaced -- one for rust, the other
for aphids.
The USDA's Cooperative State Research, Education and Extension
Service; Risk Management Agency; and the Animal Plant Health
Inspection Service have worked together to implement the system.
CSREES manages its part of the system through its land-grant
university partners, the Cooperative Extension System, the
Regional Integrated Pest Management Centers, and the National
Plant Diagnostic Network.
[byline: Marilyn Cummins]
[4] ASR
predictions for 2006
Date: 28 Apr 2006
From: ProMED-mail <promed@promedmail.org>
Source: deltafarmpress.com [edited]
<http://deltafarmpress.com/news/060428-Soybean-Rust/>
After a flurry of confirmed Asian soybean rust findings in
January and February, no new findings of the disease have been
reported since the first week of March, according to USDAšs
Soybean Rust website (<http://www.sbrusa.net).
But that doesn't mean US soybean farmers are out of the woods,
yet, says XB Yang, extension plant pathologist at Iowa State
University, who is considered one of the top US experts on Asian
soybean rust. Yang says 2006 is shaping up to be a more active
year for soybean rust because of warmer conditions and forecasts
for normal rainfall along the Gulf Coast. On average for those
months (March, April, May), Louisiana and Mississippi have
plentiful rain and cloudy days for rust development, he said.
With the current situation, rust is likely to have more activity
in the South unless there is something in the biological
information we do not know about.
Speaking at a Plant Health Seminar in Orlando, Yang noted that
in 2006 the map (on the USDA website) has already reached the
level of activity of June 2005, which does not bode well for
soybean farmers.
Yang said scientists believe they have found some answers as to
why rust moved so slowly in 2005. One involves kudzu, which was
expected to be the bell cow that would tip off researchers to
the movement of rust in the south east and Delta states.
Instead, researchers are finding that the US version of soybean
rust, at least, appears to develop more slowly than anticipated
on kudzu. "Under trees, the kudzu was intensively infested with
kudzu. But, on the other side of the road, where there were no
trees, the disease was very light. We found the same situation
in Alabama. When the kudzu was out of the shade, the disease did
not appear to move much, and that may help explain why the
disease may not be progressing well on kudzu."
Research at the University of Minnesota shows, on the other
hand, that farmers in the Mid-South and the Midwest may have had
a near miss with Asian soybean rust at some point in the 2006
growing season.
In the study funded by the United Soybean Board, Minnesota
researchers collected rainfall samples and used DNA testing to
determine if they contained Asian soybean rust spores. The
researchers used computer models of the wind currents and
tracked those rain samples back to potential sources. "They
think these spores that were found in North Dakota came from
Mexico and not from Florida or the other places," Yang said.
This is still being debated and will have to be tested further.
Yang told participants at the seminar, which was sponsored by
BASF, that the record warm temperatures this past winter
probably contributed to the increased findings of Asian soybean
rust in Alabama, Florida, Georgia and Texas earlier in 2006.
"For this reason, we could be likely to see more activity in the
spring in the South."
The long-range forecast is for the Midwest states to have normal
rainfall this spring and into the summer. If that forecast pans
out, those states would have a lower probability of a soybean
rust epidemic, says Yang, because normal rainfall does not
normally mean abundant rainfall [which drives epidemics of ASR -
Mod.JAD] for those states.
That tells us that even if we have a lot of spores blown into
the area, the risk of an outbreak is not very high because the
normal rainfall would not be favorable for rust development.
[byline: Forrest Laws <flaws@farmpress.com>]
[5] ASR 2006
Symposium, APS
Date: 19 Apr 2006
From: ProMED-mail <promed@promedmail.org>
Source:
stopsoybeanrust.com and
apsnet.org [edited]
National Soybean Rust Symposium: 29 Nov-1 Dec 2006 in St
Louis
<http://www.stopsoybeanrust.com/viewStory.asp?StoryID=791>
Based on the success of the first National Soybean Rust
Symposium in November 2005, the American Phytopathological
Society has announced the dates and location for a 2006 repeat
of the event.
The 2006 National Soybean Rust Symposium will be held 29 Nov-1
Dec 2006, at the Adam's Mark in St Louis.
As before, APS and cooperating organizations encourage
participation in the symposium by individuals from across the
spectrum, including state and federal government; academic
researchers; crop protectant manufacturers and suppliers;
educators; crop consultants; grower organizations and the food
industry.
To receive periodic updates about the upcoming 2006 National
Soybean Rust Symposium, visit <www.apsnet.org/online/sbr>, and
enter your email address in the blank at the bottom of the page
to reach the APS mailing lists form.
There is a checkbox for symposium information.
--
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.
There have been no new reports of ASR in the USA since late Feb
2006. This includes kudzu and the new 2006 sentinel plots of
soybean, both of which are watched closely. Dry weather is given
as the reason for this hiatus, especially in Florida where
earlier finds of ASR on kudzu were frequent in Jan and Feb 2006.
Item [1] reports that rain in early May 2006 in northern Florida
has resulted in a new emergence of ASR on kudzu, found 17 May
2006.
No new counties besides the 11 in which ASR was reported earlier
in the year have been added to the list of known sites of ASR in
2006.
I [Mod.JAD] have used this opportunity to add 4 other items that
came to my attention since the 3rd posting in the 2006 series on
ASR (20060226.0622).
Item [2] describes an alert for ASR that can be sent directly to
a cell phone, which may be of interest to some subscribers. Item
[3] announces new features and updates to the federal website
(<http://www.sbrusa.net>) that monitors and maps ASR in the USA.
Item [4] caught my attention as a good prediction of ASR for
2006, which has been condensed for ProMED-mail. Dr Yang, who is
quoted in the article, notes that though ASR got off to a good
start this year in southern states, it may not spread so well
from kudzu to kudzu once it is out of deep shade, and that it
will take above-average rainfall to drive epidemics. The
original article is recommended. Item [5] announces a USA
meeting on ASR organized by the American Phytopathological
Society to be held Nov 29 to Dec 1 2006. A website added under
"More links on ASR" contains a good online slideshow about ASR.
Maps:
Asian soybean rust outbreaks 2006 <http://www.sbrusa.net>
The wheat rust corridor <http://ars.usda.gov/images/docs/9757_9951/puccini_path.gif>
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.agriculture.com/ag/slideshow/slideShow.jhtml;jsessionid=EUC5WVK2YHSMHQFIBQSB42Q?slideid=/templatedata/ag/slideshow/data/1145030513267.xml>
- Mod JAD]
[see also in the
archive:
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
2005
---
ProMED-Plant Disease Report: July - December 2005 20060201.0331
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 - USA
(multistate)(09) 20051101.3187 Soybean rust, Asian strain, kudzu
control 20051006.2914 Soybean rust, Asian strain - USA (GA)(05)
20051005.2902 Soybean rust, Asian strain - USA (AL)(04)
20050917.2743 Soybean rust, Asian strain - USA (multistate)(08)
20050913.2711 Soybean rust, Asian strain - USA (multistate) (07)
20050909.2672 Soybean rust, Asian strain - USA (GA) (04)
20050905.2623 Soybean rust, Asian strain - USA (multistate)(04)
20050829.2556 Soybean rust, Asian strain - USA (GA)(03)
20050827.2531 Soybean rust, Asian strain - USA (AL)(03)
20050826.2528 Soybean rust, Asian strain - USA (AL)(02)
20050824.2496 Soybean rust, Asian strain - USA (SC)
20050818.2414 Soybean rust, Asian strain - USA (FL)(03)
20050815.2386 Soybean rust, Asian strain - USA (Multistate)(06)
20050808.2318 Soybean rust, Asian strain - USA (multistate)(05):
susp. 20050806.2291 Soybean rust - USA (multistate)(04)
20050806.2289 Asian soybean rust, Asian strain - USA
(multistate) 20050724.2133 Soybean rust, Asian strain - USA (AL)
20050715.2029 Soybean rust, Asian strain - USA (multistate)(03)
20050714.2005 Soybean rust, Asian strain - USA (multistate)(02):
Florida 20050708.1938 Soybean rust, Asian strain - USA
(multistate) 20050702.1868 Soybean rust, Asian strain - USA (LA)
20050624.1769 Soybean rust, Asian strain - USA (FL) (02)
20050620.1731 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]
