Egyptian Academic Journal of Biological Sciences F Toxicology & Pest Control,
Год журнала:
2023,
Номер
15(1), С. 157 - 170
Опубликована: Май 26, 2023
Being
the
most
invasive
and
destructive
pests
in
maize
fields,
promising
insect;
is
fall
armyworm
(FAW),
Spodoptera
frugiperda
(J.
E.
Smith)
(Lepidoptera:
Noctuidae).
The
first
onset
of
Egypt
started
2019
south
among
plants
Aswan
Governorate.
Heading
north,
pest
spread
quickly
to
Luxor,
Qena,
Sohag
Assuit
governorates
south.
Many
synthetic
insecticides
were
recommended
control
this
insect
pest.
For
purpose,
research
was
evaluate
potential
effectiveness
toxicity
following
insecticides,
Methomyl
(Lannate®
90%),
Chlorpyrifos
(Dofos
48%)
Spinosad
(Tracer
24%)
on
biological
aspects
S.
laboratory.
Bioassays
conducted
newly
molted
4th
instar
larvae
under
25
±
2
°C
room
temperature,
70
10%
relative
humidity.
LC50
values
105.5,
470,
2.5
ppm
for
compounds
methomyl,
chlorphyrifos,
spinosad,
respectively.
Distilled
water
served
group.
Accumulative
larval
mortality
percentages
42,
55
44
chlorpyrifos,
A
significant
increase
total
duration
consecutive
instars
pupae
recorded
post-treatment
at
with
concentrations
tested
insecticides.
Accordingly,
differences
frugiperda;
hence,
variation
a
reference
varying
actions
These
data
indicate
that
these
are
effective
controlling
instars.
Journal of Fungi,
Год журнала:
2022,
Номер
8(7), С. 717 - 717
Опубликована: Июль 8, 2022
The
control
of
Spodoptera
frugiperda,
the
key
invasive
pest
maize,
is
a
serious
concern
due
to
its
biology
and
current
global
restriction
on
applying
synthetic
pesticides.
Entomopathogenic
fungi
are
considered
be
potential
biological
strategy.
pathogenicity
12
isolates
Beauveria
bassiana
in
immature
stages
feeding
efficacy
S.
frugiperda
were
evaluated.
B.
QB-3.45,
QB-3.46
QB-3.428
caused
highest
egg
mortality
rates
87.3,
82.7
79.3%,
respectively,
when
applied
at
concentration
1
×
108
conidia/mL
measured
7
days
post-treatment.
Neonate
45.6
53.6%
observed
with
same
isolates.
significant
cumulative
ranging
from
71.3
93.3%
14
post-treatment
reduced
larval
69.4
77.8%
48
h
This
study
supports
using
effective
as
agent
against
frugiperda.
eggs
neonatal
larvae
reduction
second
instar
that
treated
application
entomopathogenic
biocontrol
for
population.
Frontiers in Physiology,
Год журнала:
2023,
Номер
14
Опубликована: Март 8, 2023
Maize
is
an
essential
crop
of
China.
The
recent
invasion
Spodoptera
frugiperda,
also
known
as
fall
armyworm
(FAW),
poses
a
danger
to
the
country's
ability
maintain
sustainable
level
productivity
from
this
core
crop.
Entomopathogenic
fungi
(EPF)
Metarhizium
anisopliae
MA,
Penicillium
citrinum
CTD-28
and
CTD-2,
Cladosporium
sp.
BM-8,
Aspergillus
SE-25
SE-5,
CA-7,
Syncephalastrum
racemosum
SR-23
were
tested
determine
their
effectiveness
in
causing
mortality
second
instars,
eggs,
neonate
larvae.
P.
CTD-28,
BM-8
caused
highest
levels
egg
mortality,
with
86.0,
75.3,
70.0%,
respectively,
followed
by
CTD-2
(60.0%).
Additionally,
M.
MA
neonatal
57.1%,
(40.7%).
In
addition,
decreased
feeding
efficacy
instar
larvae
FAW
77.8,
75.0,
68.1%,
(59.7%).
It
possible
that
EPF
will
play
important
role
microbial
agents
against
after
further
research
conducted
on
these
field.
Agronomy,
Год журнала:
2022,
Номер
12(6), С. 1289 - 1289
Опубликована: Май 27, 2022
Fall
armyworm,
Spodoptera
frugiperda
(JE
Smith)
(Lepidoptera:
Noctuidae),
is
a
destructive
pest
of
wide
array
agricultural
and
horticultural
crops
worldwide.
This
in
vitro
research
assessed
the
combined
effect
methanolic
extracts
indigenous
flora
Soone
Valley
(Khushab,
Pakistan)
nine
commonly
used
synthetic
insecticides
against
3rd
instar
larvae
S.
using
leaf-dip
bioassay
method.
Toxicity
bioassays
with
twelve
plant
revealed
that
Withania
somnifera
(L.)
Dunal,
Sophora
mollis
(Royle)
Baker
Rhazya
stricta
Decne.
were
most
effective,
exhibiting
minimum
LC50
LT50
values.
Bioassays
significantly
higher
mortality
by
emamectin
benzoate
(45%),
chlorpyrifos
(40%)
chlorantraniliprole
(38%).
Further
10
binary
combinations
these
effective
botanical
showed
seven
pesticidal
exhibited
synergistic
toxicity,
three
comprising
an
additive
on
larvae.
GC–MS
analyses
W.
somnifera,
R.
1,2,4-trimethyl-benzene
3,5-dimethyl-octane,
1-ethyl-2-methyl-benzene,
1-monolinoleoylglycerol
trimethylsilyl
ether,
decane,
lupeol
as
major
bioconstituents,
respectively.
Our
results
demonstrated
combining
botanicals
can
synergize
their
toxicity
larvae,
suggesting
potential
incorporation
into
future
IPM
programs
other
lepidopterous
pests.
Insects,
Год журнала:
2022,
Номер
13(10), С. 921 - 921
Опубликована: Окт. 12, 2022
Fall
armyworm,
Spodoptera
frugiperda
(J.E.
Smith)
(Lepidoptera:
Noctuidae),
is
a
polyphagous
insect
pest
of
many
important
crops.
To
evaluate
the
influence
host
plants
on
biology
and
survival
Pakistani
population
S.
frugiperda,
we
examined
life
table
parameters
raised
maize,
sorghum,
wheat,
rice.
The
development
rate
was
significantly
higher
maize
crop
than
other
three
plants.
Different
larval
diets
affected
time
fecundity.
attained
fastest
(16
days)
slowest
(32.74
Adult
females
from
maize-fed
larvae
laid
1088
eggs/female,
those
sorghum-fed
591.6
wheat-fed
435.6
rice-fed
49.6
eggs/female.
Age
stage-specific
also
indicated
fecundity,
expectancy,
hosts.
Larval
had
significant
varying
effect
finite
intrinsic
increase
rates,
reflecting
that
most
suitable
diet.
findings
present
study
are
useful
for
predicting
dynamics
especially
in
areas
cultivating
Poaceae
crops,
except
to
develop
sustainable
integrated
management
strategies
this
pest.
Ecotoxicology and Environmental Safety,
Год журнала:
2024,
Номер
282, С. 116682 - 116682
Опубликована: Июль 13, 2024
The
effectiveness,
tolerance,
and
safety
of
pesticides
must
be
established
before
their
scientific
or
rational.
This
study
evaluates
the
field
control
efficacy
broflanilide,
tetraniliprole,
chlorantraniliprole
in
combating
Spodoptera
frugiperda
maize
crops,
as
well
resistance
S.
to
these
three
diamide
after
exposure.
By
assessing
efficiency,
toxicity,
effects
on
development
reproduction,
detoxification
enzyme
activity
frugiperda,
highlights
broflanilide's
significant
insecticidal
potential.
A
highly
sensitive
efficient
method
using
QuEChERS/HPLCMS/MS
was
developed
simultaneously
detect
residues
maize.
Initial
concentrations
ranged
from
2.13
4.02
mg/kg,
with
respective
half-lives
varying
between
1.23
1.51
days.
Following
foliar
application,
by
time
harvest,
terminal
residue
were
all
under
0.01
mg/kg.
Chronic
dietary
intake
risk
assessments
cumulative
chronic
exposure
for
indicated
that
general
population's
concentration
within
acceptable
limits.
Not
only
does
this
research
provide
valuable
insights
into
effects,
resistance,
residues,
assessment
results
maize,
but
additionally,
it
also
paves
way
setting
suitable
Maximum
Residue
Limits
(MRLs)
values
based
pre-harvest
interval
values,
rational
dosage,
application
frequency.
Sustainability,
Год журнала:
2024,
Номер
16(8), С. 3118 - 3118
Опубликована: Апрель 9, 2024
Spodoptera
frugiperda
(fall
armyworm,
FAW)
is
a
significant
economic
pest
of
maize
in
Uganda.
Many
Ugandan
farmers
employ
synthetic
insecticides
as
their
main
form
control
despite
the
negative
impacts
these
chemicals.
We
tested
effectiveness
Beauveria
bassiana;
General
Biopesticide
Cocktail
(mixture
B.
bassiana,
M.
anisopliae,
Isaria
fumosoroseus,
Lecanicillium
lecani
and
Purporeocillium
lilacanus
three
strains
Metarhizium
Nimbecidine®
(azadirachtin
0.03%EC),
Roket®
(cypermethrin
4%
profenofos
40%);
Amdocs®
(emamectin
benzoate
2%
abamectin
1%)
on
fall
armyworm
parasitoids,
respectively,
2020
2021.
The
treatments
with
greatest
decrease
leaf
damage
infestation
were
Roket®,
followed
by
Nimbecidine®.
biopesticides
not
always
more
effective
than
untreated
control,
though;
efficacy
was
often
lower
that
botanical
pesticides.
recovered
one
egg
parasitoid,
Telenomus
remus,
seven
egg-larval
parasitoids
(Coccygidium
luteum,
Coccygidium
sp.,
Cotesia
icipe,
Chelonus
Micranisa
Charops
cf.
diversipes,
an
unidentified
Tachinidae).
Among
these,
C.
cf
icipe
Tachinidae
most
abundant.
Parasitism
low,
averaging
10%
for
masses
5.3%
larvae.
Application
pesticides
resulted
higher
yield
when
compared
control.
In
general,
low
population
observed.
Although
parasitoid
reduced
plots
treated
percentage
parasitism
FAW
affected.
some
instances,
yields
realized
plots.
Pest
management
practices
compatible
biological
need
to
be
considered
armyworm.
Insects,
Год журнала:
2022,
Номер
13(10), С. 881 - 881
Опубликована: Сен. 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.
Insects,
Год журнала:
2024,
Номер
15(5), С. 314 - 314
Опубликована: Апрель 26, 2024
UDP-glycosyltransferases
(UGTs)
are
a
diverse
superfamily
of
enzymes.
Insects
utilize
uridine
diphosphate-glucose
(UDP-glucose)
as
glycosyl
donor
for
glycosylation
in
vivo,
involved
the
lipophilic
endosymbionts
and
xenobiotics,
including
phytotoxins.
UGTs
act
second-stage
detoxification
metabolizing
enzymes,
which
essential
metabolism
insecticides
benzoxazine
compounds.
However,
UGT
genes
responsible
specific
functions
S.
frugiperda
unclear
at
present.
In
this
study,
we
utilized
CRISPR/Cas9
to
produce
SfUGT50A15-KO
strain
explore
its
possible
function
governing
sensitivity
chemical
or
benzoxazinoids.
The
bioassay
results
suggested
that
was
significantly
more
sensitive
chlorantraniliprole,
emamectin
benzoate,
benzoxazinoids
than
wild-type
strains.
This
finding
suggests
overexpression
SfUGT50A15
gene
may
be
linked
resistance
pesticides
(chlorantraniliprole
benzoate)
well
(BXDs).
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 2, 2025
The
brown
planthopper
(BPH)
Nilaparvata
lugens
(Stål)
is
a
major
insect
pest
of
Oryza
sativa
that
causes
crop
yield
loss
in
tropical
regions,
including
Thailand.
In
this
study,
the
crude
ethanolic
extract
leaves
and
branches
Combretum
trifoliatum
,
its
active
isolated
components,
apigenin
camphor,
Finopril
were
tested
for
their
ability
to
control
first
fifth
instars
N.
lugens.
C.
both
allelochemicals
showed
insecticide
potential
(24
h-LC50
~
8.83–95.96
mg/L
against
each
instar
extract),
toxicity
depended
on
time
exposure.
Camphor
higher
efficacy
(LD50
4.43
mg/L)
not
different
compared
Finopril.
All
plant
compounds
reduced
carboxylesterase
(CE)
glutathione-s-transferase
(GST)
activities.
caused
greatest
decreases
CE
GST
activities
after
exposure,
whereas
induced
slight
change
acetylcholinesterase
activity.
results
present
study
suggest
can
be
used
as
an
manage
populations.