B: One of the most important
things you can do often inyour soybean crop is to use
a foliar fungicide there areplant health benefits and
also certainly for diseasecontrol. So today we’re
going to talk about yourbest choices and why you
many consider spraying afungicide in your soybeans.
D: Alright let’s first talkabout the disease protection
and to get good diseaseprotection with any
fungicide in any crop, youhave to be out there in
front of it. Fungicides arepreventative products and I
realize a lot of the salesand marketing people will
tell you, “ oh this one hasreally good curative
properties,” but let’s behonest here the curative
properties are for, “hey aninfection is just
beginning-maybe on one ortwo percent out there.” Yeah
we can stop that, but ifyou’ve got an infection like
on 50 percent of your leafarea-you’re done-it’s over.
You’ve got to be out infront of that. So when we’re
anticipating when we’regoing to see disease, we
have to look for when arethe stressful times in our
plants life and when arediseases most commonly
occurring in our area. Wellwith soybeans once they hit
the reproductive stages ofgrowth, that’s where there’s
a lot of stress on thoseplants. There’s a heavy
nutrient demand. They’rereally working hard to
produce seed. That’s whenyou can get an infection and
right now is the time youhave to protect yourself
from disease. B: Now when wetalk about getting the most
out of your fungicide,Darren said you’ve got to
spray early you got to bepreventative, but the other
big thing to understand isthat fungicides don’t move
well in the plant. Basicallythe leaf area that you
touch, that’s what’sprotected if there are new
leaves that come out they’reunprotected, and if you
don’t have good coverage inthe beginning well you just
didn’t protect your planthardly at all. So the
important thing tounderstand is you’ve got to
use a good amount of spraypressure, smaller spray
droplets, it’s wholedifferent than if you’re
spraying let’s say dicambapost-emerge. We want small
droplets here, lots ofwater, and really great
coverage. D: Now when itcomes to specific diseases,
we look at white mold as onewhere R1 or first flower out
in the field is the optimumtime to start your treatment
program, because that whitemold fungus is going to get
in through those dried upblooms. So as those blooms
get pollinated and drop off,that’s an open spot where
the disease can get into theplant. So getting good
coverage up and down theplants is important. Now the
good thing too at R1especially when we’re in the
northern part of thecountry. Our soybeans aren’t
that big yet, so we can getpretty good coverage
throughout the entire plant.When we get soybeans that
are waist high or shoulderhigh, it’s really tough to
get down through that canopyvery far. That’s why I think
this first application offungicide is going to be
important. Now I mentionedthe first application. For
many of you now you may besaying, “wait a second, I
may not have used afungicide before or maybe I
don’t use one every year,now you’re telling me I have
to use it more than once perseason.” Well, like Brian
had said, fungicides don’tmove around in the plant
much, so as we get newgrowth, we may need to
protect that too. B:Alright, let’s talk
specifically about whitemold. If you have a white
mold issue or you areconcerned about that, Endura
is the best product,unfortunately its $37 an
acre, so you’re not going towant to spray that
everywhere, only where youfeel like you have a bad
white mold issue. Thenyou’re going to want to come
back 2 to maybe 3 weekslater with something like
Delaro that’s got someproline in there. Then
follow-up with Acropolismaybe 2 or 3 weeks after
that. Acropolis has theactive ingredients found in
Topsin and Domark. So thoseare the best white mold
fungicides. There’s also thenew Miravis Neo that you
could try that we believewill have some decent white
mold activity. The thing iswe’d like you to use
multiple modes of action ifat all possible. With Endura
that’s an SDHI. With Prolinethat’s a TRIzol. Then you’ve
got the other chemicalfamily is the strobilurin
family that’d be likeHeadline, Quadris usually
the strobes aren’t very goodon white mold, but we like
throwing it in there any wayfor plant health. We’ll talk
more about plant health injust a minute, but before we
do usually with white moldwe’re at R1. Also with SDS
we want you to spray at R1Fortix is the only product
that’s labeled for use at R1to suppress sudden death
syndrome. Alright if youjust want to spray once and
you say, “Look all I’m afteris just some general
diseases and maybe thisplant health,” well then
we’d suggest spraying at R2maybe just at the beginning
of R3. So that would be fullflower and very first pod.
B: So Brian mentioned planthealth and when we’re
talking this R2 to R3application that’s what
we’re going for-for the mostpart. So when we thing about
that the strobilurin familyhas been the go to plant
health products in theindustry. We think about
Headline and where it allstarted with, but there are
a lot of strobilurinproducts. Now we’ve got the
SDHI family as well andwe’ve seen some added plant
health benefits from thattoo. So we’re seeing more
growers gravitating towardsthe 2 and 3 mode of action
products whether they’regoing for disease control
and want to protectthemselves from resistance
or they’re going for planthealth benefits and trying
to get even a little longerlasting effect. B: You’ve
probably heard this planthealth thing before and you
said,” Ah plant health, whatis that exactly?” Well
specifically there are threethings. What we’re seeing is
less ethylene in the plantsthat have been sprayed with
fungicide. What that meansis that ethylene is kind of
a stress hormone in theplant. It’s going to make
the plant finish earlier, orlike Darren and I always
used to talk about prematuredeath. Ok if the plant lives
a little longer and it liveshealthier longer usually we
have more yield. So lessethylene there. The next
thing is, you’re going tosee more antioxidants in
those plants. Finally,you’re going to see cooler
temperatures. Now that wehave a lot of quick
measuring tools where youcan sense plant temperature,
just sense that temperaturewhere you’ve sprayed versus
where you have not sprayedand you will usually find
that it’s a little bitcooler in that canopy, which
is a good thing in the heatof the summer where you’ve
sprayed a fungicide. Sothose are the reasons why
we’re seeing some yield gainout of the plant health
benefits spraying insoybeans. D: Specifically
some of our favoriteproducts for plant health
have been Priaxor, Trivapro,Stratego Yield, but there
are many others out theretoo. The big thing is just
spray a fungicide. We thinkit’s a no brainer in
soybeans. We’ve seen goodgains with year in and year
out. A lot of growers arealso using this timing to
scout for insects and add aninsecticide right in. You
can certainly do that. Spraycoverage is very important
for insecticides too, so thesame spray tips will be
optimum for both of thosetypes of products. B: Darren
was just mentioning spraycoverage, well spray
coverage is really importantif you want to control our
Weed of the Week, we’ll tellyou why coming up later in
the show.