Document ID: EPA-HQ-OPP-2006-0165-0007
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2006-08-23T04:00Z

Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
PMRA
Submission
No.
/
DP
Barcode
D######
/
MRID
No.
    
1
  
11
Primary
Evaluator
Shaja
R.
Brothers,
EPS,
MURIERB/
RD
Date:
12/
13/
06
Approved
by
William
Cutchin,
Chemist,
TRB/
ARIA/
RD
STUDY
REPORTS:

MRID
No.
46287301.
Author:
Arsenovic,
M.
2004.
Study
Title:
Dimethenamidp
Magnitude
of
the
Residue
on
Green
Onion.
IR­
4
Project
No.:
07699.
Laboratory
Study
Identification
No.:
07699.01­
NDR02.
Unpublished
study
prepared
by
IR­
4
Project.

EXECUTIVE
SUMMARY:

The
Interregional
Research
Project
Number
4
(
IR­
4)
has
submitted
field
trial
data
for
dimethenamide­
p
on
green
onion.
In
six
supervised
crop
field
trials
conducted
in
Florida
(
FL),
Georgia
(
GA),
and
Texas
(
TX)
and
in
British
Columbia
(
BC),
Ontario
(
ON),
and
Quebec,
Canada
(
QC),
dimethenamid­
p
6
pounds
per
gallon
emulsifiable
concentrate
(
6
lb/
gal
EC)
was
applied
once
foliarly
to
green
onions
at
0.92­
1.06
lb
ai/
A/
season
(
1.03­
1.19
kg
ai/
ha/
season).

At
each
test
site,
one
treated
plot
and
one
untreated
control
plot
were
established.
The
treated
plot
at
each
site
received
one
broadcast
foliar
application
of
dimethenamid­
p
(
6
lb
ai/
gal
EC)
at
0.92­
1.06
lb
ai/
A/
season.
However,
at
ON04
site,
the
test
substance
was
 
6.03%
under
applied.
Timely
rainfall
and/
or
irrigation
received
within
3­
4
days
of
application
were
used
to
move
the
herbicide
into
the
upper
soil
surface.
All
applications
were
made
in
a
spray
volume
of
26­
38
gal/
A
using
broadcast
ground
equipment.
No
adjuvants
were
added
to
the
spray
mixture.

Residues
of
dimethenamid­
p
were
<
0.01
ppm
(
limit
of
quantitation;
LOQ)
in/
on
and
at
least
24
green
onion
whole
plant
raw
agricultural
commodities
(
RAC)
samples
harvested
at
pre­
harvest
intervals
(
PHI)
of
28­
32
days.
Residues
were
<
0.01
ppm
in/
on
two
additional
green
onion
RAC
samples
harvested
20
days
after
treatment.
The
highest
average
field
trial
(
HAFT)
value
for
onion
plants
was
<
0.01
ppm.

In
a
freezer
storage
stability
investigation
conducted
in
conjunction
with
the
residue
study
on
onion,
dimethenamid­
p
residues
were
stable
fortified
in
green
onion
at
0.1
ppm
and
stored
at
 ­
16
º
C
for
391
days.
The
data
supports
the
storage
intervals
and
conditions
incurred
by
residue
samples
(
frozen,
a
maximum
of
384
days
from
harvest
to
extraction
for
analysis).

The
GC
nitrogen­
phosphorous
detector
(
GC/
NPD)
analytical
method
(
BASF
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
2
  
11
method
AM­
0884­
0193­
1,
reissued
01/
93)
used
for
determining
residues
of
dimethenamid­
p
in
green
onion
is
adequate
for
data
collection
purposes.
For
method
validation,
control
samples
of
green
onions
were
fortified
with
dimethenamid­
p
at
0.01
and
0.1
ppm;
recoveries
were
92­
107%
(
99
±
5%,
n=
6).
Concurrent
recoveries
from
control
green
onion
samples
fortified
at
0.01
ppm
were
79­
118%
(
105
±
14%,
n=
7).
The
limit
of
detection
(
LOD)
and
LOQ
for
residues
of
dimethenamid­
p
in/
on
green
onion
(
whole
plant
without
roots)
are
0.003
and
0.01
ppm,
respectively.

STUDY/
WAIVER
ACCEPTABILITY/
DEFICIENCIES/
CLARIFICATIONS:

The
following
deficiencies
were
noted
in
the
field
trial
residue
data:

Supporting
data
such
as
soil
characteristics,
test
site
history,
cultural
practices,
and
maintenance
fertilizers
and
pesticide
data,
and
weather/
irrigation
records
were
not
collected
in
strict
adherence
to
40
Code
of
Federal
Regulations
(
CFR)
160
guidelines.
The
plot
maintenance
was
performed
by
the
cooperator,
but
was
not
under
Good
Laboratory
Practices
(
GLPs)
(
Trial
No.:
07699.01­
BC04).

The
weighing
of
field
samples
and
the
scale
used
were
not
in
compliance
with
GLPs
(
FL24,
GA*
12,
ON04,
and
TX*
17).

At
ON04
site,
cultural
practices
were
transcribed
from
a
notebook
and
are
not
available
as
raw
data.

The
potential
of
Hydrogen
(
pH)
determination
was
not
according
to
GLP
(
Trial
Number
07699.01­
TX*
17).

The
data
from
trial
07699.01­
QC04,
performed
by
Research
Trifolium
is
presented
in
this
report
as
supplemental
data
only
and
is
not
to
be
used
for
United
States
(
US)
tolerance
setting
purposes.
This
trial
is
not
needed
to
support
US
registration
purposes
and
is
being
presented
for
use
by
the
Canadian
Minor
Use
project
for
Canadian
tolerance
setting.
This
trial
is
not
considered
to
be
GLP
compliant
for
the
following
reasons:

·
This
trial
was
conducted
without
being
included
in
the
approved
protocol
by
the
study
director
until
after
the
samples
were
collected.

·
The
test
material
used
for
this
trial
was
not
GLP
characterized
and
a
retention
sample
was
not
retained.
No
date
of
receipt,
lot
number
or
expiration
date
was
reported
by
the
Federal
Research
Division
(
FRD).

·
A
non
independent
Quality
Assurance
(
QA)
performed
an
in­
life
inspection
and
data
audit
for
the
trial
07699.01­
QC04.
When
the
QA
inspection
reports
were
provided
to
the
IR­
4
Study
Director
and
Testing
Facility
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
3
  
11
Management
when
the
trial
was
amended
to
the
study,
the
inspections
were
deemed
unacceptable
and
the
audit
of
the
field
data
was
re­
performed
and
reported
appropriately
by
IR­
4
directed
personnel.

The
reference
substance
was
characterized
by
BASF;
therefore,
they
retain
all
the
characterization
information
and
the
archival
samples.
No
characterization
of
the
test
substance
was
performed
by
the
North
Dakota
IR­
4
Satellite
Laboratory.

The
acceptability
of
this
study
for
regulatory
purposes
is
addressed
in
the
forthcoming
U.
S.
EPA
Residue
Chemistry
Summary
Document
DP
Barcode
D318282.

COMPLIANCE:

Signed
and
dated
GLP,
Quality
Assurance
and
Data
Confidentiality
statements
are
provided.
There
were
no
deviations
noted
from
the
regulatory
requirements
set
forth
in
US
EPA
Residue
Chemistry
Test
Guidelines,
OPPTS
860.1500,
Crop
Field
Trials.

A.
BACKGROUND
INFORMATION
OUTLOOK
 
Herbicide
(
EPA
Reg.
No.
7969­
156)
is
an
EC
formulation
containing
6.0
lb
ai/
gal
of
dimethenamid­
p.
This
product
contains
a
chloroacetamide
herbicide
and
is
active
against
annual
grasses,
broadleaf
weeds,
and
sedges.
It
is
currently
being
developed
by
BASF
Corporation
for
agricultural
use.
IR­
4
has
received
a
request
for
the
minor
use
of
dimethenamid­
p
on
green
onion
for
control
of
annual
grasses,
broadleaf
weeds,
and
yellow
nutsedge.
The
residue
data
generated
in
this
study
are
to
be
used
to
establish
tolerances
for
dimethenamid­
p
residues
in/
on
treated
green
onion
in
support
of
its
US
EPA
registration
for
use
on
green
onion.
See
Table
A.
1.
for
the
test
compound
nomenclature
and
Table
A.
2.
for
the
physicochemical
properties
of
the
test
compound.

TABLE
A.
1.
Test
Compound
Nomenclature
Compound
Common
name
Dimethenamid­
P
(
or
S­
dimethenamid)

Company
experimental
name
BAS
656
H;
SAN
1289
IUPAC
name
S­
2­
chloro­
N­(
2,4­
dimethyl­
3­
thienyl)­
N­(
2­
methoxy­
1­
methylethyl)­
acetamide
CAS
name
S­
2­
chloro­
N­[(
1­
methyl­
2­
methoxy)
ethyl]­
N­(
2,4­
dimethyl­
thien­
3­
yl)
acetamide
CAS
#
163515­
14­
8
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
4
  
11
End­
use
product/(
EP)
OUTLOOK
 
Herbicide
TABLE
A.
2.
Physicochemical
Properties
of
the
Technical
Grade
Test
Compound
Parameter
Value
Reference
a
Melting
point/
range
<­
50
°
C
1999/
10167
pH
3.3
(
in
1%
aqueous
emulsion)
1997/
5178
Density
1.195
g/
cm3
1999/
10167
Water
solubility
(
25
°
C)
1449
±
17
mg/
L
(
pH
6.16)
b
1996/
5411
Solvent
solubility
(
mg/
L
at
25
°
C)
20.8g/
100mL
in
hexane;
soluble
in
all
proportions
in
tetrahydrofuran,
isopropyl
alcohol,
acetone,
ACN,
DMSO,
DCM,
toluene,
and
n­
octanol
1997/
5196
Vapour
pressure
at
25
°
C
1.88
(
±
0.29)
x
10­
5
mm
Hg
1996/
5418
Dissociation
constant
(
pKa)
No
dissociation
(
pH
1
to
11;
25
°
C)
88/
11352
Octanol/
water
partition
coefficient
Log(
KOW)
77.6
and
1.89
(
Pow
and
log
Pow)
1998/
5071
UV/
visible
absorption
spectrum
c
 
=
7560;
33nm
1998/
5123
a
BASF
Registration
Document
Number.

b
There
is
no
dissociation
in
water;
therefore,
pH
dependence
on
solubility
is
not
applicable.

c
The
molar
absorption
coefficient
(
 )
and
bandwidth
for
dimethenamid­
p
for
the
236
nm
absorbance
maximum.

B.
EXPERIMENTAL
DESIGN
B.
1.
Study
Site
Information
TABLE
B.
1.1
Trial
Site
Conditions
Soil
characteristics
Trial
Identification
(
City,
State/
Year)
Type
%
OM
a
pH
a
CEC
a
meq/
g
Tifton,
GA/
2001
(
07699.01­
GA*
12)
Sand
0.6
6.2
NAb
Gainesville,
FL/
2001
(
07699.01­
FL24)
Sandy
2.1
5.7
NA
St.
M
de
Napierville,
QC/
2001
(
07699.01­
QC04)
Muck
NA
NA
NA
Lyndon,
ON/
2001
(
07699.01­
ON04)
Silt
Loam
71.5
NA
NA
Weslaco,
TX/
2001
(
07699.01­
TX*
17)
Sandy
clay
1.0
8.3
NA
Surrey,
BC/
2001
Muck
68
NA
NA
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
5
  
11
(
07699.01­
BC04)

a
These
parameters
are
optional
except
in
cases
where
their
value
affects
the
use
pattern
for
the
chemical.

b
NA
=
Not
available
(
these
data
were
not
collected).

The
weather
conditions
at
each
site
were
generally
normal
during
the
growing
season.
Rainfall
was
below
normal
during
the
growing
season
at
one
site
(
ON04);
however,
the
high
soil
organic
matter
content
provided
sufficient
moisture
for
normal
crop
development.
In
addition,
temperatures
were
higher
than
normal
during
one
trial
(
QC04),
resulting
in
a
slower
rate
of
growth
and
smaller
harvested
onions.
Irrigation
was
used
at
all
tests
sites
except
one
(
QC04)
to
supplement
available
moisture
as
needed,
or
to
move
the
herbicide
into
the
soil
surface.

TABLE
B.
1.2.
Study
Use
Pattern.

Application
Location
(
City,
State/
Year)
EP
a
Timing
Rate,
(
lb
ai/
A)
(
g
ai/
ha)
Treat
No.
Method
Total
Rate,
(
lb
ai/
A)
(
g
ai/
ha)
Tank
Mix
Adjuvants
Tifton,
GA/
2001
(
07699.01­
GA*
12)
Dimethenamid­
p
6
lb/
gal
EC
POSTb
1.00
(
1.12)
1
Broadcast
Foliar
1.00
(
1.12)
None
Gainesville,
FL/
2001
(
07699.01­
FL24)
Dimethenamidp
6
lb/
gal
EC
POST
0.96
(
1.08)
1
Broadcast
Foliar
0.96
(
1.08)
None
Lyndon,

ON/
2001c
(
07699.01­
ON04)
Dimethenamidp
6
lb/
gal
EC
POST
0.92
(
1.03)
1
Broadcast
Foliar
0.92
(
1.03)
None
St.
Michel
de
Napierville,
QC/
2001
(
07699.01­
QC04)
Dimethenamidp
6
lb/
gal
EC
POST
1.00
(
1.12)
1
Broadcast
Foliar
1.00
(
1.12)
None
Weslaco,
TX/
2001
(
07699.01­
TX*
17)
Dimethenamidp
6
lb/
gal
EC
POST
0.99
(
1.11)
1
Broadcast
Foliar
0.99
(
1.11)
None
Surrey,
BC/
2001
(
07699.01­
BC04)
Dimethenamidp
6
lb/
gal
EC
POST
1.06
(
1.19)
1
Broadcast
Foliar
1.06
(
1.19)
None
a
EP
=
End­
use
Product
b
POST
=
Postemergence
to
green
onion,
targeting
0.98
lb
ai/
A
(
within
­
5%
to
+
10%).
c
Data
is
supplementary
only.
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
6
  
11
TABLE
B.
1.3.
Trial
Numbers
and
Geographical
Locations
Green
Onion
Requested
NAFTA
Growing
Region
Submitted
Canada
US
1
1A
2
1
3
1
4
5
1
1
5A
5B
1
1
6
1
7
7A
8
9
10
11
12
1
13
14
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
7
  
11
15
16
17
18
19
20
21
Total
6
2
3
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
8
  
11
B.
2.
Sample
Handling
and
Preparation
Duplicate
untreated
control
and
treated
green
onion
RAC
samples
(
whole
plant
without
roots)
were
harvested
at
commercial
maturity,
28­
32
days
after
treatment
(
the
minimum
PHI).
At
the
site
in
British
Columbia
(
BC04),
duplicate
control
and
treated
RAC
samples
were
harvested
20
days
after
treatment,
and
additionally,
duplicate
treated
RAC
samples
were
harvested
at
the
targeted
30­
day
PHI.

The
onion
samples
were
harvested
by
hand,
first
from
the
control
plot,
followed
by
the
treated
plot,
avoiding
plot
boundaries
and
row
ends.
The
onion
roots
were
trimmed,
and
the
dead
leaves
removed
and
discarded
before
sampling.
Each
green
onion
RAC
sample
weighed
a
minimum
of
4­
5
lb
and
consisted
of
a
minimum
of
24
onion
plants,
with
two
exceptions:
the
samples
from
the
trial
conducted
in
Quebec
(
QC04)
weighed
approximately
2­
3
lb,
and
the
samples
harvested
20
days
after
treatment
at
the
trial
in
British
Columbia
(
BC04)
weighed
1.3­
1.5
lb.
Sufficient
material
was
available
for
residue
analysis
in
both
cases.

All
RAC
samples
were
put
into
labeled,
plastic­
lined
cloth
bags,
and
were
transported
immediately
from
the
field
to
a
freezer
or
were
placed
in
coolers
in
the
field
until
they
were
transported
to
a
freezer.
All
green
onion
RAC
samples
were
stored
frozen
( ­
11
º
C)
within
4
hours
of
harvest
and
were
later
shipped
via
ACDS
freezer
truck
or
overnight
courier
(
on
dry
ice)
to
the
analytical
laboratory.

The
onion
samples
were
received
from
the
field
in
good
condition,
with
the
shipping
bags
intact
and
the
contents
frozen,
and
were
placed
in
frozen
storage
(­
27
º
C
to
­
3
º
C).
To
prepare
samples
for
analysis,
green
onion
samples
were
homogenized
with
dry
ice
in
a
commercial
processor.
After
sample
preparation,
the
samples
were
stored
in
glass
jars
and
placed
in
a
freezer
at
 ­
3
º
C
until
analysis.

B.
3.
Analytical
Methodology
Onion
samples
were
analyzed
for
dimethenamid­
p
residues
using
BASF
method
AM­
0884­
0193­
1
(
Reissued
January
1993).
For
the
analysis
of
green
onion
samples,
the
method
was
slightly
modified
with
respect
to
the
preparation
of
the
silica
gel
column
and
column
clean­
up
procedures,
which
were
modified
to
accommodate
the
smaller
silica
column.

Briefly,
residues
of
dimethenamid­
p
in/
on
green
onion
samples
are
extracted
by
blending
with
methanol:
water
(
95:
5,
v:
v),
filtered,
and
further
extracted
by
shaking
for
30
minutes
with
methanol.
Residues
in
an
aliquot
of
the
combined
extracts
are
diluted
with
water,
cleaned
up
on
a
solid
phase
extraction
(
SPE)
C18
column
eluted
with
methanol:
water
(
85:
15,
v:
v),
and
concentrated
by
rotary
evaporation.
Residues
in
the
remaining
aqueous
solution
are
applied
to
a
kieselguhr
(
Extrelut
®
)
column
eluted
with
toluene,
and
are
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
9
  
11
further
purified
on
a
silica
gel
column
eluted
with
ethyl
acetate:
hexane
(
1:
4,
v:
v).
Residues
of
dimethenamid­
p
in
the
eluate
are
concentrated,
re­
dissolved
in
toluene,
and
analyzed
by
GC/
NPD.
The
method
uses
external
standards.
The
method
detects
parent
(
R,
S)
dimethenamid,
which
has
been
determined
to
be
the
residue
of
concern
based
on
plant
metabolism
studies.
The
method
LOD
and
LOQ
were
0.003
and
0.01
ppm,
respectively,
in/
on
green
onions
(
whole
plants
without
roots).

C.
RESULTS
AND
DISCUSSION
A
storage
stability
study
was
conducted
in
conjunction
with
the
onion
residue
study.
Control
green
onion
(
ground)
samples
were
fortified
with
dimethenamid­
p
at
0.1
ppm
and
stored
at
 ­
16
º
C
until
analysis.
The
results
indicate
that
residues
of
dimethenamid­
p
are
stable
in
green
onion
(
whole
plant
without
roots
RAC)
samples
for
up
to
391
days
of
frozen
storage.
Data
are
also
available
from
a
previously
conducted
storage
stability
study
using
racemic
(
r,
s)
dimethenamid­
p.
The
results
indicated
that
dimethenamid­
p
is
stable
stored
frozen
(­
20
º
C)
in
soybean
grain,
forage,
and
hay
for
at
least
10
months.
The
available
data,
together
with
the
stability
data
generated
in
the
residue
study,
support
the
onion
residue
samples
for
which
the
maximum
frozen
storage
interval,
from
harvest
to
analysis,
was
13
months
(
PP#
3F4177,
D196509,
M.
Bradley,
2/
18/
94).

Method
validation
was
conducted
on
onions
prior
to
field
sample
analyses
as
part
of
the
green
onion
residue
study.
Control
green
onion
samples
were
fortified
with
dimethenamid­
p
at
0.01
ppm
(
the
LOQ)
and
0.1
ppm.
Recoveries
of
dimethenamid­
p
ranged
from
92%
to
107%
(
99
±
5%,
n=
6).
Apparent
residues
of
dimethenamid­
p
were
<
0.01
ppm
(<
LOQ)
in/
on
all
green
onion
control
samples
(
n=
12).
No
interferences
in
control
samples
were
noted.
Concurrent
recoveries
from
control
green
onion
samples
fortified
at
0.01
ppm
of
dimethenamid­
p
were
79­
118%
(
105
±
14%,
n=
7).
The
method
used
for
data
collection
was
adequate.

Following
one
application
of
dimethenamid­
p
(
6
lb
ai/
gal
EC)
totaling
0.92­
1.06
lb
ai/
A/
season,
residues
of
dimethenamid­
p
were
<
0.01
ppm
in/
on
at
least
24
green
onion
whole
plant
RAC
samples
harvested
at
a
28­
32
day
PHI.
Additionally,
residues
were
<
0.01
ppm
in/
on
two
treated
green
onion
RAC
samples
harvested
20
days
after
treatment.
The
highest
average
field
trial
(
HAFT)
value
for
green
onion
was
<
0.01
ppm.
The
results
from
this
supervised
crop
field
trial
study
in
green
onion
were
conducted
in
NAFTA
Growing
Regions
2,
3,
5,
5B,
6
and
12.

TABLE
C.
1.
Summary
of
Concurrent
Recoveries
of
Dimethenamid­
p
from
Onion
Matrix
Analyte
Spike
level
(
mg/
kg)
Sample
size
(
n)
Recoveries
(%)
Mean
±
std
dev
Method
Validation
Recoveries
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
10
  
11
0.01
3
107,
96,
101
101
±
5
0.1
3
92,
97,
100
96
±
4
Whole
Plant
Dimethenamid­
p
Overall
6
92­
107
99
±
5
Concurrent
Method
Recoveries
Whole
Plant
Dimethenamid­
p
0.01
7
79­
118
105
±
14
TABLE
C.
2.
Summary
of
Storage
Conditions
Matrix
(
RAC
or
Extract)
Storage
Temp.
(
°
C)
Actual
Storage
Duration
(
days)
Interval
of
Demonstrated
Storage
Stability
(
days)

Green
onion,
whole
plant
RAC
 ­
11
(
at
field)

 ­
3
(
at
lab)
384
days
391
days
TABLE
C.
3.
Residue
Data
from
Crop
Field
Trials
with
Dimethenamid­
p
Trial
ID
(
City,
State/
Year)
Region
Crop/
Variety
Commodity
or
Matrix
Total
Rate,
(
lb
ai/
A)
(
kg
ai/
ha)
PHI
(
days)
Residues
a
(
ppm)

USA
Tifton,
GA/
2001
(
07699.01­
GA*
12)
2
Green
onion/
Granex
33
Whole
plant,
without
roots
1.00
(
1.12)
29
<
0.01,
<
0.01
Gainesville,
FL/
2001
(
07699.01­
FL24)
3
Green
onion/
White
Portugal
Whole
plant,
without
roots
0.96
(
1.08)
28
<
0.01,
<
0.01
Weslaco,
TX/
2001
(
07699.01­
TX*
17)
6
Green
onion/
El
Toro
Whole
plant,
without
roots
0.99
(
1.11)
30
<
0.01,
<
0.01
Canada
Lyndon,
ON/
2001
b
(
07699.01­
ON04)
5
Green
onion/
Regment
Whole
plant,
without
roots
0.92
(
1.03)
30
<
0.01,
<
0.01
St.
Michel
de
Napierville,
QC/
2001
(
07699.01­
QC04)
5B
Green
onion/
White
Spear
Whole
plant,
without
roots
1.00
(
1.12)
32
<
0.01,
<
0.01
Surrey,
BC/
2001
(
07699.01­
BC04)
12
Green
onion/
Kincho
Whole
plant,
without
roots
1.06
(
1.19)
20
29
<
0.01,
<
0.01
<
0.01,
<
0.01
a
Residues
of
parent
dimethenamid.
b
Supplemental
Data
only.

TABLE
C.
4.
Summary
of
Residue
Data
from
Crop
Field
Trials
with
Dimethenamid­
p
Dimethenamid­
P/
120051/
BASF/
7969
DACO
7.4.1/
OPPTS
860.1500/
OECD
IIA
6.3.1,
6.3.2,
6.3.3
and
IIIA
8.3.1,
8.3.2,
8.3.3
Crop
Field
Trial
­
Onion
DP
Barcode
D318282/
MRID
No.
46287301
    
11
  
11
Residue
Levels
(
ppm)
Commodity
Total
Applic.
Rate,
(
lb
ai/
A)
(
kg
ai/
ha)
PHI
(
days)
Analyte
n
Min.
Max.
HAFT
a
Mean
Std.
Dev.

20
2
<
0.01
<
0.01
<
0.01
<
0.01
NA
Whole
plant
0.92­
1.06
(
1.03­
1.19)
28­
32
Parent
12
b
<
0.01
<
0.01
<
0.01
<
0.01
NA
a
HAFT
=
Highest
Average
Field
Trial.
b
Included
supplemental
Data.

D.
CONCLUSION
The
residue
trials
in
green
onion
were
not
adversely
impacted
by
the
farming
practices
or
environmental
conditions
of
the
trials.
The
crops
were
grown
and
maintained
according
to
typical
agricultural
practices
for
each
geographical
region.
The
sites
selected
provided
an
appropriate
range
of
soil
types,
and
the
crop
varieties
selected
were
typical
for
commercial
production
in
the
area.
The
number
and
geographic
distribution
of
the
supervised
crop
field
trials
on
onion
are
adequate.
Residues
were
<
0.01
ppm
when
treated
at
0.92­
1.06
lb
ai/
A
and
sampled
at
28­
32
days
PHI.

E.
REFERENCES
PP#
3F4177.
Dimethenamid
(
120051
SAN
582H)
in
Soybeans.
Amendment
of
October
27,
1993.
CBTS
No.
12784
Case:
284369:
Submission:
S452575.
M.
Bradley,
2/
18/
94.

F.
DOCUMENT
TRACKING
RDI:
Shaja
R.
Brothers
(
12/
13/
05),
William
Cutchin
(
12/
19/
05)
Petition
Number:
4E6844
DP
Barcode:
318282
PC
Code:
120051
Template
Version
September
2003