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SOYBEAN RUST INFORMATION
The following information was presented at Clemson University
sponsored soybean rust educational meetings by Dr. David Howle
and Dr. John Mueller:
General
Facts
-
Rust
originated in 1902 in Japan
-
50-80%
loss in yield if prevention and/or cure not practiced
-
Hurricane Ivan responsible for spore deposits in US
-
Discovered
November 10, 2004
in
Baton
Rouge, La.
-
Found
in 14 different fields in
Louisiana
-
Positive tests in Allendale, Pickens, Barnwell, Jasper,
Hampton and Horry Counties
-
Confirmed in 9 states
-
Rust
found above 32nd Parallel in
China,
this area equivalent to US and Canadian border
-
South
of Orlando, Florida is probable frost line
-
Suspect that there are no living spores in SC following drop
in temperatures
-
Hand
lens needed to really see pustuals (symptoms of rust)
Control
-
2-10%
threshold to spray
-
Don’t
judge from leaves at top of plant, look at bottom
-
Good
spray coverage critical
-
Budget
$20-30.00/per acre (potential cost to spray two or more
times)
Rust
characteristics
-
Spores
are viable 30 to 50 days
-
Life
cycle for development of spores takes 10-21 days depending
on temperature and moisture
---Optimum temperature =
55-85 degrees
---Needs 6 hours of leaf
wetness, 10-12 much better
---Heavy dew and light rainfall
is perfect for reproduction
-
To
survive must be on live tissue
-
Moves
in air currents
-
Does
not survive low temperatures, but can blow back into region
from below frost line
-
Can
defoliate a field in less than 2 weeks
-
Spores
produced from bottom of leaf
-
Each
pestual can produce a couple hundred spores
-
Lesions develop on the bottom of the leaf inside leaf veins
-
There
are an estimated 90 host species including kudzu
(does not include peanuts)
-
Spores
can move up to 300 miles/day via wind currents
Other
information
-
No
resistant variety available
-
5-6
years likely before resistant variety available
-
Not
transmitted by seed
ASR
Incursion Response Plan (USDA)
-
Decision Criteria for fungicide application
-
Surveillance and monitoring network
-
Predictive model of aerial transport
-
Web-based system for communication w/stake holders
SC
Request for Support Funds (Clemson University)
-
Awareness Meetings
-
Rust
Monitoring
-
Impacts on/of other crops, example—edible beans, winter
legumes, wildlife food plots
..Unknown impact on home gardens
..Concern—Inconsistent and poor management practices that will
result in high production of spores.
Areas
Clemson
University
and Dr. John Mueller will be studying
-
Planting dates
-
Short
season cultivars
-
Seed
treatment
-
Row
spacing
Crop
Insurance
---Losses to soybean production due to soybean rust disease is
an insurable cause of loss provided the insured can verify
that the cause was natural and available control measures were
properly applied. If there are no effective control measures
available or there are insufficient amounts of chemicals
available for effective Department of Agriculture’s Risk
Management Agency)
Information websites:
USDA forecasts concerning the movement of soybean rust:
http://www.ces.ncsu.edu/depts/pp/soybeanrust/.
(An
updated forecast is issued every Monday, Wednesday and Friday.
Click on the date on the calendar for the forecast you want
and then select the reported outbreak area to see the forecast
path of rust spores.)
Other
related websites:
Soybean
Rust
Labeled Fungicides:
Fungicides
-
Bravo Syngenta
-
Equus
720 FarmSaver
-
Equus
82.5% FarmSaver
-
Echo
720 Sipcam
-
Echo
90% Sipcam
-
Quadris Syngenta
-
Headline BASF
Section 18 Labels
-
Tilt Syngenta
-
Propimax Dow AgroSciences
-
Bumper Makhteshim-Agan
-
Folicur Bayer
-
Loredo
Dow AgroSciences
-
Stratego Bayer
-
Pristine BASF
-
Domark
.Sipcam
Protectant fungicides
-
Quadris
-
Headline
-
Stratego
-
Pristine
-
Quilt
Curative Fungicides
-
Tilt,
Propimax, Bumber
-
Folicur
-
Loredo
-
Stratego
-
Domark
Above information
recorded by
David Branham (803) 936-4692
Director of Commodity Relations
South Carolina Farm Bureau |
