Chinese oak silkworm Antherae pernyi egg, a suitable factitious host for rearing eupelmid egg parasitoids.
Anastatus
Mesocomys
biological control
host selection
mass rearing
Journal
Pest management science
ISSN: 1526-4998
Titre abrégé: Pest Manag Sci
Pays: England
ID NLM: 100898744
Informations de publication
Date de publication:
May 2022
May 2022
Historique:
revised:
05
01
2022
received:
04
06
2021
accepted:
12
01
2022
pubmed:
13
1
2022
medline:
23
4
2022
entrez:
12
1
2022
Statut:
ppublish
Résumé
Eupelmid egg parasitoids in the genera Anastatus and Mesocomys are important biological control agents for lepidopterous and hemipterous pests worldwide. The egg of Chinese oak silkworm Antheraea pernyi has been widely used for mass rearing of Trichogramma parasitoids. This study evaluated the suitability and optimal use methods of A. pernyi egg as a factitious host for the rearing of six eupelmid egg parasitoids (Anastatus fulloi, Anastatus gansuensis, Anastatus japonicus, Anastatus meilingensis, Mesocomys albitarsis and Mesocomys trabalae). Each parasitoid was tested for its oviposition preference and offspring performance on various differently treated host eggs (extracted from virgin moths or laid naturally by virgin or mated moths, and washed or unwashed prior to the use) in both no-choice and choice tests. All treated A. pernyi eggs were readily parasitized by the six parasitoids. In general, A. gansuensis and M. trabalae preferred washed over unwashed eggs regardless of the fertilization status of host eggs, A. fulloi and A. meilingensis parasitized more unfertilized than fertilized host eggs, and A. japonicus and M. albitarsis did not show a preference among differently treated host eggs. Host egg treatment did not significantly affect offspring fitness (development time, survival, sex ratio and body size) nor reproductive potential of developed adult females for each parasitoid species, except for M. albitarsis (whose females contained more eggs when reared from unfertilized than fertilized host eggs). Results suggest that manually extracted, unfertilized and washed A. pernyi eggs are most suitable for mass rearing of these eupelmid egg parasitoids in biological control programs.
Sections du résumé
BACKGROUND
BACKGROUND
Eupelmid egg parasitoids in the genera Anastatus and Mesocomys are important biological control agents for lepidopterous and hemipterous pests worldwide. The egg of Chinese oak silkworm Antheraea pernyi has been widely used for mass rearing of Trichogramma parasitoids. This study evaluated the suitability and optimal use methods of A. pernyi egg as a factitious host for the rearing of six eupelmid egg parasitoids (Anastatus fulloi, Anastatus gansuensis, Anastatus japonicus, Anastatus meilingensis, Mesocomys albitarsis and Mesocomys trabalae). Each parasitoid was tested for its oviposition preference and offspring performance on various differently treated host eggs (extracted from virgin moths or laid naturally by virgin or mated moths, and washed or unwashed prior to the use) in both no-choice and choice tests.
RESULTS
RESULTS
All treated A. pernyi eggs were readily parasitized by the six parasitoids. In general, A. gansuensis and M. trabalae preferred washed over unwashed eggs regardless of the fertilization status of host eggs, A. fulloi and A. meilingensis parasitized more unfertilized than fertilized host eggs, and A. japonicus and M. albitarsis did not show a preference among differently treated host eggs. Host egg treatment did not significantly affect offspring fitness (development time, survival, sex ratio and body size) nor reproductive potential of developed adult females for each parasitoid species, except for M. albitarsis (whose females contained more eggs when reared from unfertilized than fertilized host eggs).
CONCLUSION
CONCLUSIONS
Results suggest that manually extracted, unfertilized and washed A. pernyi eggs are most suitable for mass rearing of these eupelmid egg parasitoids in biological control programs.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1789-1799Subventions
Organisme : the National Natural Science Foundation of China
ID : 32172469
Organisme : Natural Science Research Program of Guizhou University
ID : 202101
Organisme : Key R & D Programs (Agriculture) of Gansu Province
ID : 20YF3NK030
Informations de copyright
© 2022 Society of Chemical Industry.
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