Performances of six eupelmid egg parasitoids from China on Japanese giant silkworm Caligula japonica with different host age regimes
The Japanese giant silkworm Caligula japonica Moore is an emerging defoliator pest of forest and fruit trees, causing severe economic losses in East Asia. To identify biological control agents for this pest, we comparatively evaluated six indigenous eupelmid egg parasitoids ( Anastatus fulloi , A. g...
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Veröffentlicht in: | Journal of pest science 2021-03, Vol.94 (2), p.309-319 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The Japanese giant silkworm
Caligula japonica
Moore is an emerging defoliator pest of forest and fruit trees, causing severe economic losses in East Asia. To identify biological control agents for this pest, we comparatively evaluated six indigenous eupelmid egg parasitoids (
Anastatus fulloi
,
A. gansuensis
,
A. japonicus
,
A. meilingensis
,
Mesocomys albitarsis
and
M. trabalae
) from China, in terms of their performances (number of parasitized eggs, developmental time, offspring emergence and sex ratio) on
C. japonica
eggs of four different ages (0, 10, 20 and 30-d old). Results showed that all six parasitoids readily parasitized
C. japonica
eggs of all tested ages, but
A. japonicus
was the most efficient species based on the number of parasitized eggs, followed by
M. albitarsis
and
M. trabalae
, and the other three parasitoid species. All four
Anastatus
species parasitized more old than young eggs, while
M. albitarsis
did not show a strong host age preference and
M. trabalae
parasitized the oldest less than young eggs. For all host ages, developmental time was longest in
A. gansuensis
and shortest in
M. albitarsis
, offspring emergence was high (> 90%), and progeny was strongly female biased (> 70%) among all parasitoids except for
A. gansuensis
which produced all female progeny. Portions of
A. japonicus
offspring ( |
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ISSN: | 1612-4758 1612-4766 |
DOI: | 10.1007/s10340-020-01271-1 |