Molecular Biology and Evolution,
Journal Year:
2024,
Volume and Issue:
41(7)
Published: June 27, 2024
Insect
crop
pests
threaten
global
food
security.
This
threat
is
amplified
through
the
spread
of
nonnative
species
and
adaptation
native
to
control
measures.
Adaptations
such
as
pesticide
resistance
can
result
from
selection
on
variation
within
a
population,
or
gene
flow
another
population.
We
investigate
these
processes
in
an
economically
important
noctuid
pest,
Helicoverpa
zea,
which
has
evolved
wide
range
pesticides.
Its
sister
armigera,
first
detected
invasive
Brazil
2013,
introduced
pyrethroid-resistance
CYP337B3
South
American
H.
zea
via
adaptive
introgression.
To
understand
whether
this
could
contribute
North
America,
we
sequenced
237
genomes
across
10
sample
sites.
report
armigera
introgression
into
Two
individuals
sampled
Texas
2019
carry
haplotypes
4
Mbp
region
containing
CYP337B3.
Next,
identify
signatures
panmictic
population
nonadmixed
identifying
selective
sweep
at
second
cytochrome
P450
gene:
CYP333B3.
estimate
that
its
derived
allele
conferred
∼5%
fitness
advantage
show
explains
independently
observed
rare
nonsynonymous
CYP333B3
mutations
approaching
fixation
over
∼20-year
period.
also
detect
putative
kinesin
associated
with
Bt
resistance.
Overall,
document
two
mechanisms
rapid
adaptation:
introduction
fitness-enhancing
alleles
interspecific
introgression,
intraspecific
variation.
Journal of Economic Entomology,
Journal Year:
2022,
Volume and Issue:
115(6), P. 1790 - 1805
Published: Sept. 13, 2022
The
fall
armyworm
(FAW)
Spodoptera
frugiperda
(Smith;
Lepidoptera:
Noctuidae)
is
present
in
over
70
countries
Africa,
Asia,
and
Oceania.
Its
rapid
dispersal
since
2016
when
it
was
first
reported
western
associated
devastation
to
agricultural
productivity,
highlight
the
challenges
posed
by
this
pest.
Currently,
its
management
largely
relies
on
insecticide
sprays
transgenic
Bacillus
thuringiensis
toxins,
therefore
understanding
their
responses
these
agents
characteristics
of
any
resistance
genes
enables
adaptive
strategies.
In
Australia,
S.
at
end
January
2020
northern
Queensland
March
2020,
also
Western
Australia.
As
an
urgent
response
we
undertook
bioassays
two
Australian
populations,
one
each
from
initial
points
establishment.
To
assist
with
preliminary
sensitivity
assessment,
endemic
noctuid
pest
species,
Helicoverpa
armigera
(Hübner;
Lepidoptera,
litura
(Fabricius;
Noctuidae),
were
concurrently
screened
obtain
larval
LC50
estimates
against
various
insecticides.
We
characterized
known
alleles
VGSC,
ACE-1,
RyR,
ABCC2
compare
published
allele
frequencies
bioassay
native
invasive
populations.
An
approximately
10×
difference
for
indoxacarb
detected
between
which
28×
higher
than
that
Indian
population.
Characterization
ACE-1
VGSC
provided
further
evidence
multiple
introductions
pathways
involving
genetically
distinct
individuals
results
patterns
populations
suggest
have
contributed
pest's
spread
challenge
axiom
'west-to-east'
spread.
Molecular Ecology Resources,
Journal Year:
2023,
Volume and Issue:
23(6), P. 1423 - 1441
Published: May 7, 2023
Abstract
Mythimna
separata
and
loreyi
are
global
pests
of
gramineous
cereals,
heavily
controlled
with
synthetic
insecticides.
Here,
we
generated
two
high‐quality
chromosome‐level
genome
assemblies
for
M.
(688
Mb)
(683
Mb).
Our
analysis
identified
Z
W
chromosomes,
few
genes
abundant
transposable
elements
(TEs)
found
on
the
chromosome.
We
also
observed
a
recent
explosion
long
interspersed
nuclear
(LINEs),
which
contributed
to
larger
genomes
.
The
armyworms
diverged
~10.5
MYA,
only
three
chromosomes
have
intrachromosomal
rearrangements.
Additionally,
tandem
repeat
expansion
α‐amylase
in
,
may
promote
digestion
carbohydrates
exacerbate
their
damage
crops.
Furthermore,
inferred
sex
pheromone
biosynthesis
pathway
Spodoptera
frugiperda
discovered
that
S.
synthesized
same
major
constituents
pheromones
through
different
pathways.
Specifically,
double
bonds
dominant
components
were
by
Δ9‐
Δ11‐desaturase,
while
they
Δ11‐desaturase
chain‐shortening
reactions
receptor
(PR)
corresponding
components.
These
findings
provide
better
understanding
communication
development
new
pest
control
strategy
involving
traps,
more
effective
environmentally
friendly
than
current
strategies.
Journal of Economic Entomology,
Journal Year:
2023,
Volume and Issue:
116(2), P. 310 - 320
Published: Jan. 4, 2023
Abstract
Transgenic
crops
that
produce
insecticidal
proteins
from
Bacillus
thuringiensis
(Bt)
have
provided
control
of
some
key
pests
since
1996.
However,
the
evolution
resistance
by
reduces
benefits
Bt
crops.
Resistance
to
is
not
recessively
inherited
especially
challenging
manage.
Here
we
analyzed
nonrecessive
toxin
Cry1Ac
in
eight
field
populations
Helicoverpa
armigera
sampled
2018
northern
China,
where
this
global
pest
has
been
exposed
cotton
1997.
Bioassays
revealed
7.5%
field-derived
larvae
were
resistant
which
87%
had
at
least
one
allele
conferring
resistance.
To
analyze
resistance,
developed
and
applied
a
variant
genomic
mapping
approach
called
quantitative
trait
locus
(QTL)-seq.
This
analysis
identified
region
on
chromosome
10
associated
with
all
21
backcross
families
derived
field-collected
moths.
Individual
sequencing
grandparents
previously
dominant
point
mutation
tetraspanin
gene
HaTSPAN1
occurs
QTL-seq.
QTL-seq
also
26
most
14%
families.
Overall,
results
imply
primary
genetic
basis
H.
China.
Moreover,
because
predominant,
tracking
frequency
could
facilitate
monitoring
region.
Bulletin of Entomological Research,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 15
Published: April 22, 2025
Abstract
The
tomato
leafminer,
Phthorimaea
absoluta
(synonym
Tuta
Meyrick,
1917),
is
a
transboundary
plant
pest
that
poses
serious
threat
to
global
cultivation
and
production,
with
significant
negative
social
environmental
impact
from
increased
insecticide
usage
for
its
management.
We
present
three
P.
draft
mitochondrial
genomes
(mitogenomes)
Malawi
South
Africa,
thereby
increasing
the
mitogenome
resources
this
invasive
agricultural
pest.
Comparative
analysis
Spain,
China,
Kenya
samples
revealed
at
least
seven
maternal
lineages
across
current
ranges,
supporting
multiple
introductions
as
major
factor
spread
of
populations.
Mitogenome
results
therefore
identified
unexpected
diversity
compared
use
partial
cytochrome
oxidase
subunit
I
(mtCOI/cox1)
gene
marker
inference
invasion
biology.
whole-genome
sequencing
approach
further
alternative
DNA
(mtDNA)
regions
necessary
improve
estimates,
enables
concurrent
characterisation
resistance
genes.
Characterisation
VSSG
(Para)
AChE-1/ace-1
profiles
underpin
pyrethroid
organophosphate
(OP)
resistances,
respectively,
confirmed
co-introductions
OP
genes
into
Malawian
African
Our
study
highlights
need
additional
resources,
especially
native
populations
needed
more
accurate
interpretations
introduction
pathways
development
future
sustainable
management
strategies.
BMC Biology,
Journal Year:
2025,
Volume and Issue:
23(1)
Published: Jan. 5, 2025
Alternative
food
sources
are
crucial
for
the
survival
and
reproduction
of
moths
during
nectar
scarcity.
Noctuid
make
a
better
use
fermented
than
from
other
families,
while
underlying
molecular
genetic
basis
remain
unexplored.
As
fermentation
progresses,
yeasts
lysis
accumulation
metabolic
byproducts
alter
composition
volatile
release
sugary
substrates.
However,
it
is
unclear
whether
how
this
would
affect
feeding
preference
moths.
Here,
we
identified
eight
compounds
abundant
in
dynamic
profiles
several
substrates
yeast
fermentation.
We
showed
that
cotton
bollworm
were
attracted
to
being
repelled
when
over-fermented.
The
attraction
aversion
respectively
mediated
by
isoamyl
alcohol
octanoic
acid.
deorphanized
olfactory
receptors
detecting
these
two
found
they
belonged
distinct
gene
families
functionally
conserved
across
four
noctuid
subfamilies;
HarmOR52
orthologues
responded
attractive
HarmIR75q.1
aversive
Our
findings
suggest
functional
conservation
an
adaptation
has
allowed
extend
their
diet
sources.
