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today we're gonna discuss something that we are seeing on soyabeans
just recently and we've been seeing a lot of herbicide injury as well
but we also evaluated these for disease
and so we took these plants and
you wash the roots off really well and I
notice that they were exhibiting some symptoms that signal to me that they
could have
a root rot, in particular Phytophthora
root rot. so Phytophthora is
is an Oomycete which a lot of people call as a water mold
we've been seeing this almost every day not only on soyabeans, but also
fruits and vegetables and trees because it's been so wet
we are lucky enough to have these quick strip tests
we're gonna take some of the tissue that looks symptomatic
going to take 0.15 grams of this material out
We are going to try to grind up the material inside
one of these bags and then the last part we take one of these test
strips
and stick inside down into the liquid but
We wait for about 20 minutes and two lines it's positive
so Phytophthora can attack soyabeans at any stage
whether it be seeds or seedlings
or older plants and so the symptoms are gonna depend on how
susceptible or tolerant the soyabean cultivar is.
and so you cant always depend on symptoms when you're looking at something like
this
another issue that I could run into also is that some of the symptoms might be a little
bit masked from some other herbicide
problems that I had. So some other things that we might do
with this sample is actually take some of the root tissue
and look at it under the microscope for other root rot pathogens and then we will
get a report
to the client