Journal of Insect Science (2007) 7 (16), p. 12 (Jourdie et al.)

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Violaine Jourdie, Nadir Alvarez and Ted Turlings (2007)
Identification of parasitoid species using PCR amplification and restriction enzyme digestion
Journal of Insect Science 7 (16), 12-12
XIV International Entomophagous Insects Workshop - Jun. 11-15, 2006, Newark, Delaware, U.S.A.
Abstract: Spodoptera frugiperda is a pest of great economic importance in the Americas. It is attacked by several species of parasitoids, which act as biological control agents. Parasitoids are morphologically identifiable as adults, but not as larvae. Laboratory rearing conditions are not always optimal to rear out parasitic wasps from S. frugiperda larvae collected from wild populations, and it frequently happens that parasitoids do not complete their life cycle and stop developing at the larval stage. Therefore, we explored ways to identify parasitoid larvae using molecular techniques. Sequencing is one possible technique, yet it is expensive. Here we present an alternate, cheaper way of identifying seven species of parasitoids (Cotesia marginiventris, Campoletis sonorensis, Pristomerus spinator, Chelonus insularis, Chelonus cautus, Eiphosoma vitticolle and Meteorus laphygmae) using PCR amplification of COI gene followed by a digestion with a combination of four restriction endonucleases. Each species was found to exhibit a specific pattern when the amplification product was run on an agarose gel. Identifying larvae revealed that conclusions on species composition of a population of parasitic wasps can be biased if only the emerging adults are taken into account.
Database assignments for author(s): Ted C.J. Turlings

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
identification/taxonomy
molecular biology - genes


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Spodoptera frugiperda
Campoletis sonorensis (parasitoid) Spodoptera frugiperda
Cotesia marginiventris (parasitoid) Spodoptera frugiperda
Meteorus laphygmarum (parasitoid) Spodoptera frugiperda
Chelonus insularis (parasitoid) Spodoptera frugiperda
Pristomerus spinator (parasitoid) Spodoptera frugiperda
Eiphosoma vitticolle (parasitoid) Spodoptera frugiperda
Chelonus cautus (parasitoid) Spodoptera frugiperda