Mortality Pattern of Poecilus cupreus Beetles after Repeated Topical Exposure to Insecticide─Stochastic Death or Individual Tolerance?
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(4), P. 1854 - 1864
Published: Jan. 22, 2024
The
mortality
of
organisms
exposed
to
toxicants
has
been
attributed
either
stochastic
processes
or
individual
tolerance
(IT),
leading
the
death
(SD)
and
IT
models.
While
model
follows
principles
natural
selection,
relevance
SD
debated.
To
clarify
why
idea
found
its
way
into
ecotoxicology,
we
investigated
Poecilus
cupreus
(Linnaeus,
1758)
beetles
from
pesticide-treated
oilseed
rape
(OSR)
fields
unsprayed
meadows,
subjected
repeated
insecticide
treatments.
We
analyzed
with
Kaplan–Meier
estimator
general
unified
threshold
for
survival
(GUTS),
which
integrates
assumptions.
were
three
times,
ca.
monthly,
same
dose
Proteus
110
OD
containing
thiacloprid
deltamethrin,
commonly
used
in
OSR
fields.
analysis
showed
that
meadows
was
much
higher
after
first
treatment
than
next
two,
indicating
model.
Beetles
displayed
approximately
constant
second
treatments,
consistent
GUTS
did
not
conclusively
identify
better
model,
being
marginally
Language: Английский
Bioaccumulation of pesticides in carabid beetles in a vineyard and olive grove under integrated pest management
European Journal of Entomology,
Journal Year:
2024,
Volume and Issue:
121, P. 269 - 279
Published: July 16, 2024
Intensive
use
of
pesticides
is
among
the
main
drivers
biodiversity
loss,
especially
insects.
Here,
field
concentrations
chemical
synthetic
were
measured
in
soil
and
carabid
beetles
a
vineyard
(VP)
olive
grove
(OP),
two
consecutive
years.
The
aim
was
to
determine
if
active
ingredients
applied
accumulate
carabids
how
this
correlates
with
treatment
intensity.
Carabids
samples
collected
at
Zadar
County
Croatia,
2018
2019
2019.
Both
under
integrated
pest
management
(IPM),
total
34
applied,
between
January
August
years
study.
Using
LC-MS/MS,
broad
range
pesticides,
mainly
fungicides,
detected
carabids.
In
samples,
boscalid
(0.047
mg/kg),
mandipropamid
(0.08
fluopyram
(0.09
cyprodinil
mg/kg)
tebuconazole
(0.13
highest
amounts.
addition,
nine
substances
carabids,
valiphenalate
(0.048
difenoconazole
(0.051
azoxystrobin
(0.064
concentrations.
Bioaccumulation
factor
(BAF)
indicated
accumulation
valiphenalate,
metalaxyl-M,
spiroxamine
Data
directly
revealed
which
indicates
they
could
be
good
bioindicators
IPM
contribute
better
understanding
distribution
Mediterranean
agroecosystems.
Language: Английский