Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 6, 2023
Abstract
Fungicides
are
frequently
used
during
tree
fruit
bloom
and
can
threaten
insect
pollinators.
However,
little
is
known
about
how
non-honey
bee
pollinators
such
as
the
solitary
bee,
Osmia
cornifrons
,
respond
to
contact
systemic
fungicides
commonly
in
apple
production
bloom.
This
knowledge
gap
limits
regulatory
decisions
on
determining
safe
concentrations
timing
for
fungicide
spraying.
We
evaluated
effects
of
two
(captan
mancozeb)
four
translaminar/plant
(cyprodinil,
myclobutanil,
penthiopyrad,
trifloxystrobin)
larval
weight
gain,
survival,
sex
ratio,
bacterial
diversity.
assessment
was
carried
out
through
chronic
oral
ingestion
bioassays
where
pollen
provisions
were
treated
with
three
dosages
based
currently
recommended
field
use
dose
(1X),
half
(0.5X),
low
(0.1X).
found
that
mancozeb
penthiopyrad
significantly
reduced
survival
at
all
doses.
then
sequenced
16S
gene
characterize
larvae
bacteriome
mancozeb,
caused
highest
mortality.
fed
mancozeb-treated
lower
diversity
abundance.
Our
laboratory
results
suggest
some
these
be
particularly
harmful
health
O.
when
sprayed
information
relevant
future
management
sustainable
crop
protection
products
informing
processes
aim
protect
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Feb. 8, 2024
Fungicides
are
frequently
used
during
tree
fruit
bloom
and
can
threaten
insect
pollinators.
However,
little
is
known
about
how
non-honey
bee
pollinators
such
as
the
solitary
bee,
Osmia
cornifrons,
respond
to
contact
systemic
fungicides
commonly
in
apple
production
bloom.
This
knowledge
gap
limits
regulatory
decisions
that
determine
safe
concentrations
timing
for
fungicide
spraying.
We
evaluated
effects
of
two
(captan
mancozeb)
four
translaminar/plant
(cyprodinil,
myclobutanil,
penthiopyrad,
trifloxystrobin)
on
larval
weight
gain,
survival,
sex
ratio,
bacterial
diversity.
assessment
was
carried
out
using
chronic
oral
ingestion
bioassays
where
pollen
provisions
were
treated
with
three
doses
based
currently
recommended
field
use
dose
(1X),
half
(0.5X),
low
(0.1X).
Mancozeb
penthiopyrad
significantly
reduced
survival
at
all
doses.
then
sequenced
16S
gene
characterize
larvae
bacteriome
mancozeb,
caused
highest
mortality.
found
fed
mancozeb-treated
lower
diversity
abundance.
Our
laboratory
results
suggest
some
these
be
particularly
harmful
health
O.
cornifrons
when
sprayed
information
relevant
future
management
sustainable
crop
protection
products
informing
processes
aim
protect
Insect Science,
Journal Year:
2023,
Volume and Issue:
31(3), P. 859 - 869
Published: Aug. 21, 2023
Abstract
The
aboveground
oligolectic
bee,
Heriades
truncorum
,
is
a
particularly
good
model
for
studying
the
impact
of
pesticides
on
sexual
communication,
since
some
aspects
its
mating
behavior
have
previously
been
described.
We
tested
(1)
interference
pesticide
flupyradifurone
male
precopulatory
and
partner
preferences,
(2)
way
that
interferes
in
quality
assessment
by
female,
(3)
effects
chemical
compounds
female
cuticle.
exposed
bees
both
sexes
to
sublethal
concentration
flupyradifurone.
Various
behaviors
were
registered
arena
with
two
females
(one
unexposed
one
exposed)
(either
or
exposed).
Unexposed
males
quicker
attempt
mate.
Treatment
also
impacted
females.
Males
approached
more
quickly
than
insecticide‐exposed
ones.
Females
insecticide
produced
lower
amounts
cuticular
hydrocarbons
(sex
pheromone
candidates)
appeared
less
choosy
Our
findings
suggest
exposure
affects
playing
role
preference
female.
Journal of Apicultural Research,
Journal Year:
2023,
Volume and Issue:
unknown, P. 1 - 13
Published: Dec. 11, 2023
Exposure
to
pesticides
may
jeopardize
pollinators,
but
it
has
rarely
been
examined
in
urban
landscapes.
We
used
larval
food
provisions
(mix
of
pollen
and
nectar)
mason
bees
(Osmia
spp.)
nested
artificial
shelters
as
matrices
investigate
the
rate
pesticide
pollution
twelve
allotment
sites
Prague
Brno
cities.
Seven
commercial
croplands
(fruit
orchards,
oilseed
rape
fields)
were
selected
for
comparison.
In
total,
79
samples
analysed
using
a
validated
UPLC–MS/MS
method
presence
262
and/or
important
metabolites.
Fifty-six
residues
detected
allotments
74
cropland
sites.
Fifty
compounds
common
both
Fewer
found
(14.3
±
0.9,
mean
SE)
than
(21.5
1.1,
SE;
df
=
17.4;
t
−2.9;
p
<
0.01),
they
present
at
low
levels
up
16
ppb.
sites,
ten
occurred
high
individual
concentrations
(mean
per
site
>
10
ppb).
The
highest
observed
fungicide
pyrimethanil
1,989
ppb,
maximum
3,983
ppb)
among
insecticides
thiacloprid
136
170
results
supported
presumption
lower
risk
exposure
gardens
croplands.
Given
limited
knowledge
on
sublethal
effects
especially
mixtures
solitary
bee
development,
regulation
or
control
use
is
recommended.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 8, 2024
Abstract
Pesticides
provide
vital
protection
against
insect
pests
and
the
diseases
they
vector
but
are
simultaneously
implicated
in
drastic
worldwide
decline
of
beneficial
populations.
Convincing
evidence
suggests
that
even
sublethal
pesticide
exposure
has
detrimental
effects
on
both
individual-
colony-level
traits,
mechanisms
mediating
these
remained
poorly
understood.
Here,
we
use
bumble
bees
to
examine
how
pesticides
affects
mating,
a
key
life
history
event
shared
by
nearly
all
insects,
whether
impacts
mediated
via
impaired
sexual
communication.
In
mate
location
copulation
primarily
regulated
through
chemical
signals
rely
production
perception
semiochemicals.
We
show
behavioral
bioassays
mating
success
is
reduced
bee
gynes
after
field-relevant
doses
imidacloprid,
this
effect
likely
disruption
Semiochemical
was
altered
gyne
male
cuticular
hydrocarbons
(CHCs),
not
exocrine
glands
where
sex
pheromones
presumably
produced
(i.e.,
mandibular
labial
glands).
Male
responsiveness
gland
secretion
reduced,
queen
secretion.
addition,
fat
body
lipid
stores
sperm
quality.
Overall,
imidacloprid
affected
fitness
CHCs
sexes
antennal
responses
males
gynes.
Together,
our
findings
identify
signaling
as
mechanism
which
reduces
success.
Journal of Insect Behavior,
Journal Year:
2022,
Volume and Issue:
35(5-6), P. 160 - 170
Published: Nov. 1, 2022
Abstract
Hymenopteran
females
are
mostly
highly
selective,
choosing
their
mating
partner
according
to
male
quality
signals,
and
may
also
signal
fertility
through
chemical
advertisement.
Male
insects,
in
turn,
often
display
a
complex
set
of
courtship
behaviors
allure
mate.
In
this
study
we
explored
the
mechanisms
triggering
oligolectic
bee
Heriades
truncorum
.
species,
males
perform
wing
fanning
followed
by
sideways
rocking
motion
before
copulation.
We
tested
role
cues
recognition
exposing
dead
washed
from
cuticular
extracts
(i.e.,
sex
pheromones)
that
were
posteriorly
coated,
or
not,
with
an
extract
unmated
females.
Additionally,
experimentally
reduced
length
test
whether
was
responsible
for
motions.
found
interact
more
coated
females,
presence
these
pheromones.
important
motions,
which
essential
behavior
successful
possibly
element
used
evaluate
quality.
Our
shows
both
mechanical
signals
female
bees,
respectively,
elements
system
H.
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 6, 2023
Abstract
Fungicides
are
frequently
used
during
tree
fruit
bloom
and
can
threaten
insect
pollinators.
However,
little
is
known
about
how
non-honey
bee
pollinators
such
as
the
solitary
bee,
Osmia
cornifrons
,
respond
to
contact
systemic
fungicides
commonly
in
apple
production
bloom.
This
knowledge
gap
limits
regulatory
decisions
on
determining
safe
concentrations
timing
for
fungicide
spraying.
We
evaluated
effects
of
two
(captan
mancozeb)
four
translaminar/plant
(cyprodinil,
myclobutanil,
penthiopyrad,
trifloxystrobin)
larval
weight
gain,
survival,
sex
ratio,
bacterial
diversity.
assessment
was
carried
out
through
chronic
oral
ingestion
bioassays
where
pollen
provisions
were
treated
with
three
dosages
based
currently
recommended
field
use
dose
(1X),
half
(0.5X),
low
(0.1X).
found
that
mancozeb
penthiopyrad
significantly
reduced
survival
at
all
doses.
then
sequenced
16S
gene
characterize
larvae
bacteriome
mancozeb,
caused
highest
mortality.
fed
mancozeb-treated
lower
diversity
abundance.
Our
laboratory
results
suggest
some
these
be
particularly
harmful
health
O.
when
sprayed
information
relevant
future
management
sustainable
crop
protection
products
informing
processes
aim
protect
