Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Ноя. 5, 2024
Abstract
The
fall
armyworm
(FAW),
Spodoptera
frugiperda
(Smith),
is
a
significant
pest
threatening
crops
like
maize
across
Africa,
necessitating
sustainable
management
alternatives.
This
study
evaluates
the
efficacy
of
Trichogramma
evanescens
as
biological
control
agent
against
FAW
egg
masses
in
Egypt
under
laboratory
and
semi-field
conditions.
larvae
were
initially
collected
from
infested
fields
reared
on
castor-oil
plant
leaves.
Meanwhile,
T.
was
propagated
using
Sitotroga
cerealella
eggs
hosts.
host
eggs,
aged
18
to
24
h,
sterilized
with
UV
light
prevent
development
while
maintaining
suitability
for
parasitism.
Using
custom-designed
parasitoid
incubators
hemisphere
clip-cages,
experiments
focused
various
mass
configurations,
assessing
effects
scales
layering.
Laboratory
conditions
controlled
at
25
±
2ºC
55
5%
relative
humidity,
trials
used
large
cages
approximate
natural
results
showed
that
settings,
parasitism
rates
averaged
5.96%,
2.00%,
1.56%
non-,
average-,
dense-scale
masses,
respectively.
For
varying
layers,
5.24%
single-layer,
3.09%
double-layer,
1.18%
ple-layer,
regardless
scale
presence.
In
conditions,
1.01%
1.13%
0.59%
triple-layer
masses.
Correspondingly,
1.85%,
0.60%
0.27%.
concludes
shows
promise
integrated
programs;
however,
its
effectiveness
constrained
by
physical
environmental
variables.
Optimizing
timing
releases
selecting
robust
strains
could
enhance
control,
reducing
reliance
chemical
pesticides
Egypt.
Biological Control,
Год журнала:
2024,
Номер
192, С. 105504 - 105504
Опубликована: Март 16, 2024
Species
of
the
genus
Trichogramma
Westwood
(Hymenoptera:
Trichogrammatidae)
are
widely
used
for
pest
control,
highlighting
importance
exploring
new
species
advancement
biological
control
programs.
The
study
aimed
to
evaluate
efficacy
foersteri
Takahashi,
a
recently
discovered
species,
in
controlling
Spodoptera
frugiperda
(JE
Smith)
and
S.
eridania
(Stoll),
two
significant
pests
numerous
cash
crops.
Over
three
days,
research
examined
parasitism,
non-reproductive
mortality,
emergence
rates
both
species.
demonstrated
effective
reducing
144.1
±
6.0
eggs
(one
layer)
55.4
4.0
(two
layers)
frugiperda,
as
well
150.7
5.6
eridania.
Non-reproductive
effects
contributed
significantly
causing
demise
192.6
4.7
118.6
3.8
one
layers
294.7
7.0
Within
T.
controlled
approximately
334.2
7.6
174.0
layers,
respectively,
445.4
7.2
highest
occurred
on
first
day
evaluation,
with
80.4
%
23.0
These
findings
underscore
potential
an
agent
provide
valuable
insights
development
sustainable
strategies.
CABI Agriculture and Bioscience,
Год журнала:
2024,
Номер
5(1)
Опубликована: Июнь 17, 2024
Abstract
Background
Telenomus
remus
is
an
egg
parasitoid
used
as
a
biocontrol
agent
to
control
the
invasive
pest
Spodoptera
frugiperda
.
The
use
of
high-quality
factitious
hosts
needed
for
efficient
mass
rearing
high-fitness
parasitoids
biological
releases.
To
improve
efficiency
and
quality
production
rearing,
we
evaluated
host
perference,
supplemental
nutrition,
ultraviolet
(UV)
irradiation,
density,
exposure
duration.
Quality
Te.
has
not
been
conducted
previously.
This
study
determined
conditions
factors
necessary
effective
Methods
preferred
was
effects
nutrition
on
adults,
well
those
irradiation
eggs
were
evaluated.
subsequent
impact
also
assessed.
optimal
parasitoid-to-host
ratio
duration
studied.
Results
S.
host.
Nutrition
supplementation
prolonged
female
longevity
increased
fecundity
UV
caused
shrivel,
having
negative
effect
reproduction.
When
ranged
from
1:4
1:10
48
h,
lower
wizened
rate,
higher
emergence
greater
proportion
obtained.
Conclusions
indicated,
it
found
litura
could
sever
alternative
non-UV-irradiated
should
be
provided.
suitable
ranges
1:
4
1:10,
by
eggs.
Anais da Academia Brasileira de Ciências,
Год журнала:
2024,
Номер
96(4)
Опубликована: Янв. 1, 2024
Telenomus
remus
(Hymenoptera:
Scelionidae)
is
an
efficient
parasitoid
of
Spodoptera
eggs.
However,
biological
control
programs
require
taxonomic,
bioecological
and
behavioral
studies
agents.
Although
the
performance
T.
in
pest
has
been
evaluated,
little
known
about
its
aspects
that
can
influence
IPM
tactics.
The
aim
this
study
was
therefore
to
parameters
related
oviposition
behavior
on
frugiperda
(Lepidoptera:
Noctuidae)
experiment
conducted
laboratory,
where
17
females
were
transferred
individually
arenas
containing
a
mass
S.
Oviposition
recorded
for
30
minutes.
average
walking
speed
0.116
mm.s-1
total
distance
covered
203.3
mm.
remained
egg
masses
16.7
min,
which
corresponds
more
than
half
time.
number
parasitized
eggs
15.1
per
female
Females
with
larger
antennae
had
lower
values
covered.
results
evaluated
show
standard
help
us
better
understand
species.
Insects,
Год журнала:
2024,
Номер
15(4), С. 233 - 233
Опубликована: Март 28, 2024
Spodoptera
frugiperda
is
the
preferred
host
of
parasitoid
Telenomus
remus.
Cold
storage
can
preserve
a
sufficient
quantity
parasitoids
and
their
hosts
in
laboratory
colony
for
mass
release.
First,
effects
cold
on
reproductive
capacity
T.
remus
reared
non-stored
S.
eggs
hatching
rate
unparasitized
were
investigated.
Further,
dual
stored
studied
to
determine
optimal
conditions
maximal
shelf
life
both
parasitoid.
The
emergence
rate,
number
adults
produced,
female
proportion
affected
by
factors.
Pupae
at
13
°C
15
days
optimum
eggs.
could
only
be
10
five
suitable
rearing
parasitizing
7
5
larval
stage.
lives
cold-stored
days.
eggs,
thereby
further
affecting
findings
suggest
that
different
should
used
when
mass-rearing
reproduced
using
fresh
laid
maximum
life.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Ноя. 5, 2024
Abstract
The
fall
armyworm
(FAW),
Spodoptera
frugiperda
(Smith),
is
a
significant
pest
threatening
crops
like
maize
across
Africa,
necessitating
sustainable
management
alternatives.
This
study
evaluates
the
efficacy
of
Trichogramma
evanescens
as
biological
control
agent
against
FAW
egg
masses
in
Egypt
under
laboratory
and
semi-field
conditions.
larvae
were
initially
collected
from
infested
fields
reared
on
castor-oil
plant
leaves.
Meanwhile,
T.
was
propagated
using
Sitotroga
cerealella
eggs
hosts.
host
eggs,
aged
18
to
24
h,
sterilized
with
UV
light
prevent
development
while
maintaining
suitability
for
parasitism.
Using
custom-designed
parasitoid
incubators
hemisphere
clip-cages,
experiments
focused
various
mass
configurations,
assessing
effects
scales
layering.
Laboratory
conditions
controlled
at
25
±
2ºC
55
5%
relative
humidity,
trials
used
large
cages
approximate
natural
results
showed
that
settings,
parasitism
rates
averaged
5.96%,
2.00%,
1.56%
non-,
average-,
dense-scale
masses,
respectively.
For
varying
layers,
5.24%
single-layer,
3.09%
double-layer,
1.18%
ple-layer,
regardless
scale
presence.
In
conditions,
1.01%
1.13%
0.59%
triple-layer
masses.
Correspondingly,
1.85%,
0.60%
0.27%.
concludes
shows
promise
integrated
programs;
however,
its
effectiveness
constrained
by
physical
environmental
variables.
Optimizing
timing
releases
selecting
robust
strains
could
enhance
control,
reducing
reliance
chemical
pesticides
Egypt.
