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 Soybean
Podcasts
Soybean Rust Update
September 8, 2009
(3 minutes: 24 seconds)
3GP (3G Mobile Phones)
(3 minutes: 24 seconds)
MP3 (audio only)
(3 minutes: 24 seconds)
MP4 (iPhone)
(3 minutes: 24 seconds) WMV (PC)
Audio/Video Script:
Scott Monfort
Extension Plant Pathologist
[Title Slide – Soybean Rust Update, Scott Monfort, Extension Plant
Pathologist, Number 13 – September
8, 2009, Your Soybean Podcast, University of Arkansas Division of Agriculture,
Arkansas Soybean Promotion Board]
[Scott Monfort standing in a soybean field] I’m Scott
Monfort Extension Plant Pathologist with the University of Arkansas Division of
Agriculture. I wanted to take a little time today, September the 8th
and talk to you a little bit about the soybean rust situation here in the state.
[Slide showing map of the state of Arkansas with county outlines; Rust
Priorities (picture of soybean pods); Where are you located?] The primary thing
you need to look for when you are trying to decide whether or not to put out a
fungicide is where are you located. So far Soybean Rust again has been found
from the east central part of the state to the south. [Slide showing map of the
state of Arkansas with county outlines; Rust Priorities (picture of soybean
pods); Counties with confirmed rust cases underlined are Woodruff, St. Francis,
Lee, Monroe, Prairie, Lonoke, Pulaski, Phillips, Arkansas, Jefferson, Lincoln,
Desha, Drew, Chicot, and Ashely.]
[Slide showing map of the state of Arkansas with county
outlines; Rust Priorities (picture of soybean pods); Growth Stage?] The second
thing that you need to look for and is very important before you make a
fungicide application is what growth stage am I at. [Slide showing map of the
state of Arkansas with county outlines; Rust Priorities; Growth Stage 5.5 +
fungicide may not be necessary] If you’re at growth stage 5.5 and greater then
we’re saying you’re probably going to outrun the problem and a fungicide may not
be economical. [Slide showing map of the state of Arkansas with county outlines;
Rust Priorities (picture of soybean pods); 4.5 - 5.5 + consider fungicide]
However, if you’re between a 4.5 and a 5.5 you may want to apply a fungicide
for control of Soybean Rust. [Scott Monfort] And in that case what you want to
apply is a TRIzol by itself.
Now if you’re at an earlier growth stage say early R4 and
younger then there are a few other things you have to take in account. [Slide -
Rust Priorities (picture of soybean pods); Bean Yield Potential $ v. Fungicide
cost] One, are these beans at a high enough yield potential that will warrant,
or pay for a fungicide application? [Scott Monfort] If so well then you will
have to make that decision based on where you’re at whether or not you need put
out a fungicide now or you want to wait a little bit and sample that field send
it in to the diagnostic lab and get a confirmation on whether or not you have
rust in it. But for most of you guys in these areas where we have confirmed
soybean rust you’ve gotta make that decision on whether not you wanna protect
them now or wait a little bit.
You also need to be aware of the other diseases that are
out there. I’ve had a few calls regarding aerial blight and frog eye and you’re
wondering if you need to wait to see if rust develops. That is something that
you do not want to do. [Slide - Rust Priorities (picture of soybean pods);
Control other bean diseases along with rust] You want to make sure you control
these other diseases along with controlling rust if you need to and [Scott
Monfort] then monitor that field as it gets closer to your five, growth stage
five and see if there is a possibility of rust coming back in because if you
apply at R3 your residual may run out by R5 so you may have to apply again you
know, for rust control and I’m talking about a TRIzol only then. But that’s only
if it starts and develops later in that growing season.
[Slide showing map of the state of Arkansas with county
outlines; Counties with confirmed rust cases underlined are Woodruff, St.
Francis, Lee, Monroe, Prairie, Lonoke, Pulaski, Phillips, Arkansas, Jefferson,
Lincoln, Desha, Drew, Chicot, and Ashely.] We are expecting the rust situation
to move out a little bit further. We had enough cloudy weather, enough wind and
some rain in areas that will promote this disease to develop and spread out.
[Scott Monfort] So over the next couple of weeks you’ll probably hear of more
areas start to develop or be confirmed with Soybean Rust so please stay tuned
and we will continue to update as quick as we can.
[Narrator] Your Arkansas Soybean Podcast" is a production of the University of Arkansas
Division of Agriculture and was funded in part by the Arkansas Soybean Promotion
Board. For more information on soybean farming in Arkansas contact your local
county Extension Office. [Title slide - For more information contact your local
county Extension office. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]
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