Biosynthesized Chitosan-Coated Silver Nanoparticles: Insecticide Activity and Sublethal Effects Against Drosophila suzukii (Diptera: Drosophilidae)
Biomolecules,
Journal Year:
2025,
Volume and Issue:
15(4), P. 490 - 490
Published: March 27, 2025
The
overuse
of
synthetic
pesticides
has
triggered
resistance
in
insect
pests
and
caused
severe
environmental
impacts,
emphasizing
the
urgent
need
for
sustainable
alternatives
Integrated
Pest
Management
(IPM).
This
study
aimed
to
biosynthesize
characterize
chitosan-coated
silver
nanoparticles
(AgChNPs)
using
Galega
officinalis
leaf
extract
evaluate
their
insecticidal
effects
against
Drosophila
suzukii
(Diptera:
Drosophilidae),
a
key
pest
fruit
crops
worldwide.
biosynthesized
AgChNPs
(257.2
nm)
were
polydisperse,
crystalline,
stable,
as
confirmed
by
UV-vis
spectroscopy,
dynamic
light
scattering
(DLS),
X-ray
diffraction
(XRD),
transmission
electron
microscopy
(TEM).
exhibited
strong
toxicity
across
multiple
developmental
stages.
Combined
larvicidal
pupicidal
activity
reached
48.3%
73.3%
at
500
1000
ppm,
respectively,
significantly
affecting
immature
As
consequence,
adult
emergence
declined
46.7%,
51.7%,
26.7%
250,
500,
ppm.
Among
emerged
adults,
71.7%
displayed
sublethal
effects,
with
62.8%
showing
morphological
malformations
(deformed
wings,
dehydration)
37.2%
presenting
cuticle
demelanization.
Adulticidal
bioassays
revealed
progressive
mortality
over
48
h,
96%
Overall,
acute
chronic
toxicity,
reduced
emergence,
induced
alterations,
demonstrating
potential
nanotechnological
tool
effective
control
within
IPM
programs.
Language: Английский
Nanoparticles Alter Locust Development and Behaviour
Preetam K. Sharma,
No information about this author
Liya Wei,
No information about this author
Atul Thakur
No information about this author
et al.
Nanoscale,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Locusts,
among
the
world's
most
destructive
migratory
pests,
threaten
food
security
by
devastating
crops
and
pastures.
Conventional
chemical
insecticides
pose
environmental
health
risks,
highlighting
need
for
sustainable
alternatives.
We
demonstrate
efficacy
of
nickel
ferrite
(NiFe2O4)
nanoparticles
(36
±
10
nm),
as
a
safe,
cost-effective
insecticide
locust
management.
These
NiFe2O4
disrupt
development
impairing
blastokinesis
growth,
thus
resulting
in
malformed
nymphs
with
compacted
abdomens
disorganised
body
structures
-
primarily
arising
from
significantly
lower
heart
rates
(30
bpm
control
vs.
20
embryos
exposed
to
NiFe2O4)
changes
end-diastolic
end-systolic
dimensions.
Adult
locusts
retained
ingested
their
coelomic
cavities,
which
could
potentially
be
used
traceable
markers
swarm
tracking.
Additionally,
were
recoverable
soil
over
90%
efficiency,
minimising
potential
ecological
impact.
Our
research
therefore
offers
an
innovative
nanotechnology-based
solution
effective
Language: Английский
Fabrication of biosynthesized nickel ferrites nanoparticles and evaluation of their insecticidal efficacy on beetles (Blaps polychresta) testicular integrity
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Feb. 28, 2025
Abstract
Green
synthesis
of
nanoparticles
has
emerged
as
a
significant
strategy
to
develop
effective
and
eco-friendly
insecticide
agents
combat
resistance
preserve
environmental
integrity
biodiversity.
This
study
was
thus
designed
fabricate
novel
green
synthesized
NiFe
2
O
4
(NiFe
NPs)
investigate
their
potential
insecticidal
effects
for
the
first
time
using
Blaps
polychresta
beetle
an
agricultural
coleopteran
pest
model.
Therefore,
we
prepared
NPs
following
hydrothermal
procedure
in
presence
lemon
juice.
The
physiochemical
characteristics
were
investigated
employing
SEM,
TEM,
FT-IR,
XRD,
TGA,
VSM,
UV-Vis
analysis.
lowest
most
dose
against
male
beetles
ascertained
at
concentration
0.03
mg/g
body
weight,
reporting
67%
mortality
after
48
h.
To
impact
NPs,
EDX
analysis
demonstrated
bioaccumulation
testicular
tissues
beetles,
leading
pathophysiological
consequences.
Precisely,
oxidative
stress
incited
by
led
disturbance
antioxidant
defense
system,
which
defined
augmentation
lipid
peroxidation
suppression
enzymes.
Furthermore,
comet
assay
exhibited
remarkable
DNA
impairment,
while
flow
cytometry
showed
substantial
cellular
necrosis
apoptosis
NPs-treated
compared
control
insects.
In
correlation
with
these
findings,
several
aberrations
histological
ultrastructure
attributes
perceived,
including
impaired
follicular
cyst
walls,
deteriorated
parietal
cells,
necrosis,
vacuolations.
These
results
implied
that
triggered
injury
testes,
resulting
reproductive
system
dysfunction.
Altogether,
our
findings
accentuate
application
nanopesticides,
paving
way
sustainable
cost-effective
management
insect
pests
agriculture.
Language: Английский
Chitosan-Coated Silver Nanocomposites: Biosynthesis, Mechanical Properties, and Ag+ Release in Liquid and Biofilm Forms
International Journal of Molecular Sciences,
Journal Year:
2025,
Volume and Issue:
26(9), P. 4130 - 4130
Published: April 26, 2025
This
study
explores
the
biosynthesis,
characterization,
and
evaluation
of
silver
nanoparticles
coated
with
chitosan
(AgChNPs)
for
liquid
nanocomposite
biofilm
formation
in
integrated
pest
management
(IPM).
AgChNPs
were
synthesized
using
Galega
officinalis
leaf
extract
as
a
reducing
agent,
varying
concentrations
(0.5%,
1%,
2%)
pH
levels
(3,
4,
5).
Synthesis
was
optimized
based
on
nanoparticle
size,
stability,
polydispersity
index
(PDI)
over
21
days.
Biofilms
incorporating
analyzed
chemical,
physical,
mechanical,
thermal
properties
via
Ultraviolet-visible
spectroscopy
(UV-vis),
Dynamic
Light
Scattering
(DLS),
Zeta
Potential
Analysis,
Fourier
Transform
Infrared
Spectroscopy
(FTIR),
X-Ray
Diffraction
(XRD),
Transmission
Electron
Microscopy
Energy
Dispersive
X-ray
(TEM-EDX),
Inductively
Coupled
Plasma
Optical
Emission
(ICP-OES)
to
quantify
ionization.
TEM
confirmed
spherical
(5.54-61.46
nm),
FTIR
validated
G.
functionalization
chitosan.
1%
at
4
exhibited
optimal
properties:
size
207.88
nm,
zeta
potential
+42.30
mV,
PDI
0.62.
displayed
tunable
mechanical
strength,
tensile
strength
3.48
MPa
5%
glycerol
2%
an
elongation
break
24.99
mm.
TGA
showed
two-step
degradation
process
(98.19%
mass
loss).
Ag
ionization
62.57
mg/L
184.07
mg/kg
biofilms.
These
findings
highlight
AgChNPs'
controlled-release
enhanced
performance,
supporting
sustainable
agricultural
applications.
Language: Английский