Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 6, 2023
Abstract
The
fall
armyworm
(FAW),
Spodoptera
frugiperda
,
is
a
highly
polyphagous
invasive
pest
that
damages
on
various
crops.
Pesticide
control
the
most
common
and
effective
strategy
to
of
FAW.
In
this
study,
we
evaluated
toxicity
metaflumizone
indoxacarb
against
third-instar
FAW
larvae
using
insecticide-incorporated
artificial
diet
method
under
laboratory
conditions.
Both
exhibited
substantial
FAW,
with
LC
50
values
2.43
14.66
mg/kg
at
72
h,
respectively.
sublethal
effects
were
investigated
by
exposing
10
30
concentrations
these
insecticides.
Sublethal
exposure
two
insecticides
significantly
shortened
larval
adult
developmental
times,
extended
pupal
led
reduced
weight,
pupation
rates,
fecundity
in
treated
parental
generation
or
concentrations,
comparison
group.
We
also
assessed
he
transgenerational
effects,
findings
indicated
had
comparable
F0
generation,
except
for
an
observed
significant
increase
time
F1
generation.
Furthermore,
Larvae
exposed
elevated
activity
levels
Multifunctional
oxidase
(MFO)
glutathione
S-transferase
(GST),
which
coincides
synergistic
effect
PBO
DEM.
conclusion,
high
negative
impact
provided
implications
rational
utilization
pest.
Toxics,
Journal Year:
2023,
Volume and Issue:
11(4), P. 307 - 307
Published: March 26, 2023
The
fall
armyworm
(FAW),
Spodoptera
frugiperda,
is
one
of
the
most
devastating
invasive
polyphagous
pests,
which
has
attracted
recent
global
attention
by
developing
resistance
to
various
insecticidal
active
ingredients
with
independent
mode
action.
Fluxametamide,
a
newly
commercialized
isoxazoline
insecticide,
exceptionally
selective
towards
several
lepidopteran
pests.
present
study
aimed
evaluate
risk
in
FAW
fluxametamide
and
fitness
costs
associated
resistance.
A
field-collected
genetically
mixed
population
was
artificially
selected
through
continuous
exposure
fluxametamide.
After
successive
selection
10
generations,
there
no
obvious
increase
LC50
(RF:
2.63-fold).
realized
heritability
(h2)
estimated
as
h2
=
0.084
using
quantitative
genetic
approach.
Compared
susceptible
F0
strain,
Flux-SEL
(F10)
strain
displayed
significant
cross-resistance
broflanilide,
chlorantraniliprole,
fipronil,
indoxacarb,
lambda
cyhalothrin,
spinetoram,
tetraniliprole,
except
emamectin
benzoate
2.08-fold).
Increased
activity
glutathione
S-transferase
(ratio
1.94)
observed
FAW,
while
cytochrome
P450
carboxylesterase
activities
were
not
altered.
fluxametamide-selection
significantly
affected
development
reproductive
traits
lower
R0,
T
relative
(Rf
0.353).
results
alluded
that
evolution
relatively
lower;
however,
proactive
implementation
management
approaches
should
be
done
maintain
field
efficacy
against
FAW.
Insects,
Journal Year:
2022,
Volume and Issue:
13(10), P. 881 - 881
Published: Sept. 28, 2022
Fall
armyworm
[Spodoptera
frugiperda
(J.
E.
Smith,
1797)]
was
first
reported
in
the
Americas,
then
spread
to
all
continents
of
world.
Chemical
insecticides
are
frequently
employed
managing
fall
armyworms.
These
have
various
modes
actions
and
target
sites
kill
insects.
Chlorantraniliprole
is
a
selective
insecticide
with
novel
mode
action
used
against
Lepidopteran,
Coleopteran,
Isopteran,
Dipteran
pests.
This
study
determined
chlorantraniliprole’s
lethal,
sub-lethal,
trans-generational
effects
on
two
consecutive
generations
(F0,
F1,
F2)
armyworm.
Bioassays
revealed
that
chlorantraniliprole
exhibited
higher
toxicity
armyworms
LC50
2.781
mg/L
after
48
h
exposure.
Significant
differences
were
noted
biological
parameters
generations.
Sub-lethal
concentrations
showed
prolonged
larval
adult
durations.
The
related
fitness
cost
F0
F1
non-significant
differences.
In
contrast,
F2
generation
lower
fecundity
at
lethal
(71
eggs/female)
sub-lethal
(94
doses
compared
control
(127.5–129.3
eggs/female).
Age-stage
specific
survival
rate
(Sxj),
life
expectancy
(Exj)
reproductive
(Vxj)
significantly
differed
among
insecticide-treated
groups
control.
A
comparison
treated
untreated
insects
over
indicated
substantial
demographic
such
as
net
reproduction
(R0),
intrinsic
increase
(r),
mean
time
(T).
Several
shown
be
negatively
impacted
by
chlorantraniliprole.
We
conclude
may
utilized
manage
lesser
risks.
Crop Protection,
Journal Year:
2024,
Volume and Issue:
180, P. 106647 - 106647
Published: March 7, 2024
Spodoptera
frugiperda
(JE
Smith)
is
one
of
the
most
destructive
pests,
causing
serious
yield
losses
corn
on
all
continents
except
Europe.
Low-lethal
concentrations
insecticides
may
affect
not
only
survival
rate
but
also
demographic
parameters
a
pest.
To
understand
effect
low-lethal
S.
frugiperda,
developmental
after
treatment
by
three
different
modes
action
pesticides
tetrachloroamide,
spinetoram,
and
lufenuron
were
analyzed.
For
F0
generation,
pupal
length
weight
FAW
insecticide
significantly
longer
heavier
than
that
control.
F1
adult
longevity
egg
hatching
spinetoram
treated
was
shorter
lower
While
no
significant
observed
for
intrinsic
increase
(r),
finite
(λ),
mean
generation
time
(T)
net
reproductive
(R0)
decreased
treatment.
Results
showed
negatively
larval
rate,
caused
early
maturity,
treatments
increased
reproduction.
The
results
this
study
suggest
concentration
exposure
to
impacts
life
table
those
from
cannot
cause
resurgence
can
be
recommended
as
control
FAW.
Those
will
helpful
researchers
working
management
using
chemical
in
an
integrated
pest
program.
Insects,
Journal Year:
2024,
Volume and Issue:
15(4), P. 247 - 247
Published: April 3, 2024
The
toxicity
and
sublethal
effects
of
three
insecticides
(spirotetramat,
cyantraniliprole,
pymetrozine)
on
Aphis
gossypii,
a
major
agricultural
pest,
were
investigated.
nymphal
stage
showed
greater
susceptibility
than
the
adult
to
all
insecticides,
with
difference
up
8.9
times
at
LC50
spirotetramat.
concentrations
(LC10,
LC30,
LC50,
LC70)
developmental
period,
survival
rate,
longevity,
fecundity,
deformity
rate
compared
those
control.
Compared
control,
cyantraniliprole
pymetrozine
did
not
significantly
affect
period
in
parental
or
F1
generation
when
applied
any
concentration.
Nonviable
nymphs
occurred
both
adults
treated
spirotetramat
but
F2
generation.
age-specific
maternity
(lxmx)
A.
gossypii
LC30)
decreased
increasing
Spirotetramat
LC30
resulted
significant
differences
life
table
parameters
(R0,
rm,
λ,
T,
DT)
Similarly,
that
control
(43.8),
net
reproductive
(R0)
for
except
LC10
(37.5).
Therefore,
this
study
indicated
(over
spirotetramat,
might
be
useful
density
management
gossypii.
Journal of Asia-Pacific Entomology,
Journal Year:
2023,
Volume and Issue:
26(4), P. 102152 - 102152
Published: Sept. 14, 2023
The
fall
armyworm,
Spodoptera
frugiperda
(Lepidoptera:
Noctuidae),
is
a
major
maize
pest
worldwide
and
has
caused
huge
economic
loss.
To
explore
the
control
tactics
of
S.
in
mountain
planting
fields,
studies
were
performed
China
from
2020
to
2021
for
screening
frugiperda-resistant
variety,
seed
coating
agents,
chemical
insecticides,
biological
agents.
results
showed
that
75
g/hm2
Emamectin
benzoate
had
better
controlling
efficacy
(with
91.05%
at
1d)
than
other
chemicals,
so
it
was
recommended
high
incidence
period
pests.
Compared
with
treatments,
50%
Lumingwei
TM625FS
76.19%
10d)
best
against
frugiperda.
"Telenomus
remus
+
Picromerus
lewisi"
"T.
Eocanthecona
furcellata"
good
on
76.01%,
64.10%
20d,
respectively.
Additionally,
there
lower
numbers
variety
GuiDan6,
BaoYu9,
YanBaiYu8.
In
summary,
this
research
four
effective
management
strategies
(GuiDan6-resistant
TM625FS-seed
5%
emamectin
benzoate-chemical
pesticide,
P.
lewisi"-biological
control)
fields.
study
provided
Journal of Applied Entomology,
Journal Year:
2023,
Volume and Issue:
148(3), P. 287 - 303
Published: Oct. 16, 2023
Abstract
Allium
mongolicum
Regel
leaf
beetle,
Galeruca
daurica
(Coleoptera:
Chrysomelidae)
is
rampantly
harmful
in
Inner
Mongolia
grassland.
However,
the
current
management
strategies
for
this
pest
still
heavily
rely
on
chemical
control
using
traditional
insecticides
or
those
with
novel
action.
In
study,
we
conducted
an
indoor
bioassay
to
evaluate
sublethal
effects
of
chlorantraniliprole
biological
characteristics.
Additionally,
assessed
activity
detoxification
enzymes,
specifically
primary
enzymes
carboxylesterase
(CarE)
and
cytochrome
P450,
insect's
secondary
metabolic
namely
glutathione
S‐transferase
(GST)
uridine
diphosphate
glycosyltransferase
(UGT),
as
well
its
gene
expression
profile.
The
developmental
period
3rd
instar
larvae
G.
was
significantly
prolonged
after
treatment
chlorantraniliprole,
which
negatively
affected
hatching,
pupation
diapause
rates
their
body
weight.
showed
different
dynamics
enzyme
activities
within
24
h
treatment.
Different
concentrations
inducing
effect
activities,
while
no
significant
difference
observed
P450.
Expression
profiling
detoxifying
genes
screened
by
transcriptome
data
has
revealed
that
6
CarE,
2
GST,
7
UGT
31
P450
were
up‐regulated.
conclusion,
chlorantraniliprole's
resulted
a
deceleration
growth
processes
increased
levels
GST
UGT.
proteins
encoded
up‐regulation
may
involve
metabolism
chlorantraniliprole.
Our
results
provide
basis
understanding
molecular
mechanisms
action
key
grassland
insect
pest.
Journal of King Saud University - Science,
Journal Year:
2023,
Volume and Issue:
36(2), P. 103070 - 103070
Published: Dec. 19, 2023
The
world's
worst
invading
insect
is
the
whitefly,
Bemisia
tabaci
Gennadius
(Hemiptera:
Aleyrodidae).
For
B.
tabaci's
thorough
field
control,
research
on
sublethal
impacts
of
popular
insecticides
crucial.
We
examined
effects
insecticide
concentrations
whiteflies'
predilection
for
oviposition
treated
plants
brinjal
(Solanum
melongena
L.
cv.
Hisar
Shyamal)
using
a
multiple-choice
test
during
2019
and
2020
growing
seasons.
efficacy
was
evaluated
basis
preference
that
were
raised
in
pots
repeatedly
with
distinct
dosage
insecticides.
biochemical
changes
leaves
also
this
research,
along
their
connection
to
tendency.
findings
showed
whiteflies
favored
fenpropathrin
30%
EC
deltamethrin
2.8%
over
diafenthiuron
50%
WP
thiamethoxam
25%
WG.
In
comparison
untreated
control
plants,
most
eggs
deposited
doses
at
50g
a.i./ha
7.5g
a.i./ha.
tests
exception
lesser
dosages
(30%
EC)
as
well
(2.8%
EC),
all
insecticidal
treatments
reduced
total
sugar
amino
acids.
Additionally,
pesticides
overall
phenol
level
significantly
altered
crude
protein
content.
plant
attracted
because
it
provides
an
improved
site
them
terms
nourishment.
Mutualism
between
insects
and
symbiotic
bacteria
drives
insect
evolution,
insecticide
resistance
is
affected
by
bacteria,
increasing
the
complexity
of
pest
resistance.
This
study
evaluated
sublethal
transgenerational
effects
neonicotinoid
nitenpyram
on
population
dynamics
Acyrthosiphon
gossypii
measured
its
impact
bacterial
community.
The
results
showed
that
LC20
(2.49
mg·L−1)
significantly
reduced
fecundity
lifespan
parent
G0
generation
A.
gossypii,
had
similar
inhibitory
G1
G2
generations.
Compared
with
those
control
group,
parameters
λ
(finite
rate
increase),
R0
(net
re-productive
rate),
r
(intrinsic
increase
rate)
were
reduced,
but
mean
gen-eration
time
(T)
was
increased.
Nitenpyram
treatment
biological
traits
also
changed
relative
abundance
Buchnera
Sphingomonas
in
three
consecutive
generations
G0-G2.
Under
treatment,
decreased
G0,
while
Sphin-gomonas
increased
G2,
Sphingo-monas
decreased.
Our
findings
may
provide
a
new
perspective
for
evaluating
potential
pesticides
aphids.
Mutualism
between
insects
and
symbiotic
bacteria
drives
insect
evolution,
insecticide
resistance
is
affected
by
bacteria,
increasing
the
complexity
of
pest
resistance.
This
study
evaluated
sublethal
transgenerational
effects
neonicotinoid
nitenpyram
on
population
dynamics
Acyrthosiphon
gossypii
measured
its
impact
bacterial
community.
The
results
showed
that
LC20
(2.49
mg·L−1)
significantly
reduced
fecundity
lifespan
parent
G0
generation
A.
gossypii,
had
similar
inhibitory
G1
G2
generations.
Compared
with
those
control
group,
parameters
λ
(finite
rate
increase),
R0
(net
reproductive
rate),
r
(intrinsic
increase
rate)
were
reduced,
but
mean
time
(T)
was
increased.
Nitenpyram
treatment
biological
traits
also
changed
relative
abundance
Buchnera
Sphingomonas
in
three
consecutive
generations
G0-G2.
Under
treatment,
decreased
G0,
while
increased
G2,
decreased.
Our
findings
may
provide
a
new
perspective
for
evaluating
potential
pesticides
aphids.
