Dicrotophos
Minutes
Amvac
Meeting
October
25,
2005
Conference
Rm.
1123
Attendees:
Jon
Wood,
Amvac
Ian
Chart,
Amvac
PaulVaculin,
Amvac
Cliff
Habig,
Exponent
Ray
Young,
NAICC
Frank
Carter,
National
Cotton
Council
Ralph
Bagwell,
LSU
Ag.
Center
Angus
Catchot,
MSU
Rick
Keigwin,
EPA/
BEAD
Arnet
Jones,
EPA/
BEAD
Tim
Kiely,
EPA/
BEAD
Bill
Chism,
EPA/
BEAD
David
Widowsky,
EPA/
BEAD
Jonathan
Angier,
EPA/
EFED
Tom
A.
Bailey,
EPA/
EFED
Dana
Spatz,
EPA/
EFED
Steven
Bradbury,
EPA/
EFED
Debbie
Edwards,
EPA/
SRRD
Amaris
Johnson,
EPA/
SRRD
Summary
of
Meeting:
OPP
met
with
representatives
from
Amvac,
the
Cotton
Council,
entomologists
from
LSU
and
MSU,
regarding
the
seasonal
maximum
application
rate
of
dicrotophos
(
Bidrin).
Amvac
requested
the
meeting
with
OPP
to
discuss
the
desire
for
a
seasonal
maximum
application
rate
of
1.0
lb
ai/
A.
The
Cotton
Council
and
university
entomologists
believe
those
two
applications
at
0.5
lb
ai/
A
are
necessary
to
control
late
season
Tarnished
Plant
and
Stink
Bugs.
The
cotton
experts
confirmed
that
from
2002
 
2004
there
has
been
an
increase
in
stink
and
plant
bug
pressure,
leading
to
a
greater
need
for
the
high
application
of
dicrotophos
in
cotton
fields.
Cotton
farmers
are
now
making
up
to
ten
applications
per
season
of
insecticides.
The
termination
of
the
boll
weevil
eradication
program
and
upsurge
in
growth
of
Bt
Cotton
has
lead
to
an
increased
need
for
dicrotophos
use
on
cotton.

The
Cotton
Council
and
university
entomologists
agreed
that
dicrotophos
is
the
most
consistently
effective
pesticide
to
treat
the
full
spectrum
of
cotton
pests.
The
price
for
Bidrin
is
less
than
the
alternatives
making
it
the
preference
for
many
growers.
However,
the
alternatives
acephate,
methyl
parathion,
and
the
neonicitinoids
are
also
effective
at
treating
outbreaks
of
stink
and
plant
bugs.
The
cotton
experts
were
in
agreement
that
growers
would
reserve
the
maximum
single
application
rate
of
dicrotophos
for
late
season
flare­
ups
of
stink
and
plant
bugs,
while
using
the
alternative
insecticides
for
the
early
season
to
treat
aphids,
thrips,
and
fleahoppers.

The
Agency's
scientists
inquired
about
a
14­
day
reapplication
interval
that
should
decrease
exposure
to
birds.
The
university
entomologists
stated
that
a
14­
day
reapplication
interval
should
be
effective
for
treating
late
season
plant
and
stink
bugs.

EPA
agreed
to
review
the
new
use
information
submitted
by
Amvac,
and
follow­
up
with
a
response
on
the
request
for
two
late
season
applications
at
the
maximum
single
application
rate
of
0.5
lb
ai/
A.
