Abstract
The
fall
armyworm
(
Spodoptera
frugiperda
)
is
one
of
the
major
pest
insects
damaging
diverse
crops
including
cotton,
corn,
rice,
and
sorghum.
Fall
armyworms
have
been
identified
as
two
morphologically
indistinguishable
strains,
corn
strain,
rice
named
after
their
preferred
host‐plants.
Although
initially
recognized
host‐plant
there
has
an
ongoing
debate
regarding
whether
strains
should
be
considered
such.
In
this
article,
we
present
arguments
based
on
recent
population
genomics
studies
supporting
that
these
to
strains.
Furthermore,
adaptation
appears
a
driving
evolutionary
force
responsible
for
incipient
speciation
in
armyworm.
Plant Stress,
Год журнала:
2024,
Номер
11, С. 100366 - 100366
Опубликована: Янв. 17, 2024
African
agricultural
systems
are
now
in
crucial
need
to
assure
food
for
the
overgrowing
population.
To
meet
this
challenges,
we
better
way
identify
and
modify
key
proteins
genes
involved
yield
potential,
nutrient
value,
stress
tolerance
crops
like
maize,
sorghum,
soybeans,
cassava,
rice,
etc.
The
deep
understanding
of
metabolomics,
transcriptomics,
proteomics,
genomics
has
proven
be
a
useful
tool
increasing
crop
resilience
Africa.
However,
there
is
very
little
information
available
regarding
recent
use
omics
technology
increase
yields
This
review
provided
advances
plants
molecular
profiling
techniques
enhance
our
breeding
strategies
grown
study
will
plant
technologies
inform
strategies.
Insects,
Год журнала:
2021,
Номер
12(5), С. 468 - 468
Опубликована: Май 18, 2021
Field
evolved
resistance
to
insecticides
is
one
of
the
main
challenges
in
pest
control.
The
fall
armyworm
(FAW)
a
lepidopteran
species
causing
severe
crop
losses,
especially
corn.
While
native
Americas,
presence
FAW
was
confirmed
West
Africa
2016.
Since
then,
has
been
detected
over
70
countries
covering
sub-Saharan
Africa,
Middle
East,
North
South
Asia,
Southeast
and
Oceania.
In
this
study,
we
tested
whether
invasion
accompanied
by
spread
mutations
from
invasive
areas.
We
observed
that
Bt
at
ABCC2
genes
were
only
populations
where
initially
reported.
Invasive
found
have
higher
gene
numbers
cytochrome
P450
than
proportion
multiple
acetylcholinesterase
genes,
supporting
strong
selective
pressure
for
against
synthetic
insecticides.
This
result
explains
susceptibility
various
Chinese
populations.
These
results
highlight
necessity
regular
standardized
monitoring
insecticide
using
both
genomic
approaches
bioassay
experiments.
Abstract
Background
Herbivorous
insects
acquire
their
gut
microbiota
from
diverse
sources,
and
these
microorganisms
play
significant
roles
in
insect
hosts’
tolerance
to
plant
secondary
defensive
compounds.
Camellia
weevil
(
Curculio
chinensis
)
(CW)
is
an
obligate
seed
parasite
of
oleifera
plants.
Our
previous
study
linked
the
CW’s
microbiome
tea
saponin
(TS)
C.
seeds.
However,
source
microbiomes,
key
bacteria
involved
TS
tolerance,
degradation
functions
remain
unresolved.
Results
indicated
that
CW
was
more
affected
by
soil
than
fruits.
The
soil-derived
Acinetobacter
served
as
core
bacterial
genus,
sp.
putatively
regarded
responsible
for
saponin-degradation
guts.
Subsequent
experiments
using
fluorescently
labeled
cultures
verified
isolate
AS23
can
migrate
into
larval
guts,
ultimately
endow
its
host
with
ability
degrade
saponin,
thereby
allowing
subsist
a
pest
within
fruits
resisting
higher
concentration
chemical.
Conclusions
systematic
studies
sources
microorganisms,
screening
taxa
metabolite
degradation,
investigation
toxicity
mitigation
provide
clarified
evidence
intestinal
mediate
herbivorous
against
toxins.
Advanced Agrochem,
Год журнала:
2023,
Номер
3(1), С. 74 - 82
Опубликована: Сен. 2, 2023
The
interactions
between
plants
and
herbivorous
insects
are
complex
involve
multiple
factors,
driving
species
formation
leading
to
the
beginning
of
co-evolution
diversification
plant
insect
molecules.
Various
molecular
processes
regulate
insects.
Here,
we
discuss
patterns
perception
feeding
through
activation
early
signaling
components,
crosstalk
defense
network
composed
hormones,
various
adaptive
changes
in
responses
defenses.
Both
defenses
counter-defenses
adaptation
each
other.
Molecular
models
plant-herbivorous
can
more
intuitively
help
us
understand
co-evolutionary
arms
race
These
results
will
provide
detailed
evidence
elucidate
enrich
interaction
Molecular Ecology,
Год журнала:
2023,
Номер
32(20), С. 5463 - 5478
Опубликована: Авг. 28, 2023
The
major
plant
pest
fall
armyworm
(FAW),
Spodoptera
frugiperda,
is
native
to
the
Americas
and
has
colonized
Africa
Asia
within
Eastern
hemisphere
since
2016,
causing
severe
damage
multiple
agricultural
crop
species.
However,
genetic
origin
of
these
invasive
populations
requires
more
in-depth
exploration.
We
analysed
variation
across
genomes
280
FAW
individuals
from
both
Americas.
global
range-wide
structure
shows
that
in
America
experienced
deep
differentiation,
largely
consistent
with
Z-chromosomal
Tpi
haplotypes
commonly
used
differentiate
'corn-strain'
'rice-strain'
populations.
are
different
American
ones
have
a
relatively
homogeneous
population
structure,
common
recent
spreading
Asia.
Our
analyses
suggest
north-
central
most
likely
sources
invasion
into
hemisphere.
Furthermore,
evidence
based
on
genomic,
transcriptomic
mitochondrial
haplotype
network
indicates
an
earlier,
independent
introduction
Africa,
subsequent
migration
population.
The
fall
armyworm
(FAW)
Spodoptera
frugiperda,
a
highly
invasive,
polyphagous
pest,
poses
global
agricultural
threat.
It
has
two
strains,
the
C-corn
and
R-rice
each
with
distinct
host
preferences.
This
study
compares
detoxification
enzyme
gene
families
across
these
strains
related
species
to
explore
their
adaptation
diverse
plant
metabolites.
A
total
of
1,995
detoxification-related
genes,
including
cytochrome
P450
monooxygenases
(CYPs),
carboxylesterases
(COEs),
glutathione
S-transferases
(GSTs),
UDP-glucuronosyltransferases
(UGTs),
ATP-binding
cassette
transporters
(ABCs),
were
identified
genus
Spodoptera,
S.
littoralis,
litura,
picta,
exigua,
both
FAW
strains.
higher
abundance
phase
I
enzymes
(CYPs
COEs)
GSTs
was
observed
in
species,
while
exhibited
fewer
notable
differences
copy
numbers
between
C
R
Analyses
at
subfamily
level
revealed
significant
variation
distribution
expression,
particularly
within
II
enzymes.
Expansions
CYP6AE
detected
strain,
contractions
GST-ε,
CYP9A,
CYP4M,
UGT33B,
UGT33F
occurred
In
contrast,
no
substantial
III
ABC
Functional
predictions
protein
interaction
networks
suggest
broader
expansion
metabolism-related
genes
strain
compared
strain.
These
findings
emphasize
pivotal
role
adaptation,
providing
molecular
insights
into
FAW's
capacity
for
range
expansion,
which
are
crucial
devising
targeted
sustainable
pest
management
strategies.
differential
expression
different
frugiperda.
Journal of Economic Entomology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 20, 2025
Abstract
Methoxyfenozide
is
an
insecticide
with
a
unique
mode
of
action
on
the
insect
ecdysone
receptor
and
has
been
registered
for
control
pests
all
over
world.
In
present
work,
Spodoptera
frugiperda
was
exposed
to
sublethal
lethal
concentrations
methoxyfenozide
determine
its
impact
specific
biological
traits,
metabolic
enzyme
activity,
expression
detoxification
enzymes.
The
result
showed
that
72-h
posttreatment
LC50
LC70
significantly
reduced
fecundity
(eggs/female)
F0
generation
compared
those
group.
However,
duration
prepupal
period
increased.
exposure
LC10,
LC30,
LC50,
extended
developmental
larvae
in
F1
individuals.
decreased,
population
life
table
parameters
were
also
affected.
activity
carboxylesterases
little
significant
change,
whereas
glutathione
S-transferases
(GSTs)
cytochrome
P450
monooxygenases
(P450s)
altered
after
methoxyfenozide.
total,
24-,
48-,
96-h
could
cause
upregulation
genes
such
as
CYP6AE44,
CYP6B39,
CYP9A26,
CYP9A58,
CYP9A59,
CYP9A60,
well
GST
including
GSTe3,
GSTe9,
GSTe10,
GSTe15,
GSTo2,
GSTs1,
GSTs5,
GSTm2,
GSTm3.
These
findings
be
instrumental
elucidating
molecular
mechanisms
underlying
effects
S.
frugiperda.
Mixed
cropping
systems
typically
provide
better
natural
pest
control
compared
with
monocultures,
although
the
success
varies
depending
on
crop
and
cultivar
combinations.
Understanding
trait
interactions
that
confer
associational
resistance
(AR)
to
companion
plants
is
key
optimizing
these
benefits.
The
Mesoamerican
milpa
system,
known
for
its
resistance,
provides
a
model
studying
interactions.
We
tested
two
hypotheses
investigate
whether
access
extrafloral
nectar
(EFN)
produced
by
Phaseolus
vulgaris
(common
bean)
can
protect
Zea
mays
(maize):
(1)
EFN
enhances
survival
performance
of
parasitoid
wasp,
leading
increased
parasitism
fall
armyworm
(FAW)
caterpillars
accompanying
maize
reduced
herbivory,
(2)
bean
detect
herbivore-induced
plant
volatiles
(HIPVs)
respond
increasing
secretion.
Controlled
experiments
demonstrated
wasps
from
lived
longer,
had
higher
fecundity,
parasitized
more
maize,
thereby
reducing
herbivore
damage.
Additionally,
caterpillar-damaged
primed
secretion
in
via
HIPVs.
Our
findings
reveal
potentially
important
AR
mechanism
milpa,
contributing
reputed
resistance.
This
understanding
could
inform
design
sustainable
mixed
enhance
control.
International Journal of Molecular Sciences,
Год журнала:
2021,
Номер
22(20), С. 11266 - 11266
Опубликована: Окт. 19, 2021
Spodoptera
frugiperda
is
a
highly
polyphagous
and
invasive
agricultural
pest
that
can
harm
more
than
300
plants
cause
huge
economic
losses
to
crops.
Symbiotic
bacteria
play
an
important
role
in
the
host
biology
ecology
of
herbivores,
have
wide
range
effects
on
growth
adaptation.
In
this
study,
high-throughput
sequencing
technology
was
used
investigate
different
hosts
(corn,
wild
oat,
oilseed
rape,
pepper,
artificial
diet)
gut
microbial
community
structure
diversity.
Corn
one
most
favored
S.
frugiperda.
We
compared
microbiota
corn
with
without
seed
coating
agent.
The
results
showed
Firmicutes
Bacteroidetes
dominated
community.
abundance
rape
highest,
diversity
oat
lowest,
agent
significantly
higher
such
PCoA
analysis
there
were
significant
differences
among
hosts.
PICRUSt
functional
prediction
categories
related
metabolic
cellular
processes.
affected
not
only
by
species,
but
also
treatments,
which
played
It
deepen
our
understanding
symbiotic
relationships
between
organisms
microorganisms.
study
adaptability
insects
contributes
development
effective
environmentally
friendly
management
strategies.