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Asian
Soybean
Rust
Soybean rust has been a problem in many parts of the world since 1902 when it was found in Japan. Since that time, many countries across many continents have been affected by this disease. From 1997-2001, the countries of Uganda, Zimbabwe, and South Africa have confirmed the presence of Asian soybean rust. By the year 2000, rust had spread all the way to Paraguay, South America and later into other countries including Brazil, Argentina, and in 2004 the country of Bolivia found soybean rust (Figure 3) The disease is thought to have arrived in the United States by wind currents associated with Hurricane Ivan. The locations that the pathogen was found along with the pattern that Ivan took suggest that the spores came in from South America on the hurricane winds. The first confirmed case in Mississippi was found July 13, 2005.
There are no resistant varieties and no cultural practices available to control this disease at this time. The only option available to producers is the use of fungicides. Fungicides have shown to be beneficial in other countries (Figure 5). |
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Pictures and slides in
this subject area have been shared commonly among plant
pathologists, soybean agronomists, and many others dealing
with Asian soybean rust. They are courtesy of APHIS,
USDA-ARS (Dr. Monte Miles, Dr. Glen Hartmen), EMBRAPA, a
private consultant in Zimbabwe, BASF Chemical Co., and
Syngenta. |
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Asian
or Australasian soybean rust has the potential to devastate
the Mississippi soybean crop. In the fall of 2004, it was
found in several fields along the Mississippi River
(
The
major impact that soybean rust has on soybean production is
YIELD! Protecting yields is the number one concern for
growers. Rust has shown to affect yield tremendously. Yield
loss as high as 100% has been seen in some countries.
(
