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Olfactory host location and host preference of Holepyris sylvanidis (Brèthes) (Hymenoptera: Bethylidae), a parasitoid of Tribolium confusum Jacquelin du Val and T. castaneum (Herbst) (Coleoptera: Tenebrionidae)
Ist Teil von
Journal of stored products research, 2018-09, Vol.78, p.105-109
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Parasitoids can suppress populations of their host and thus play a primary role in Integrated Pest Management. We studied foraging cues in Holepyris sylvanidis (Hymenoptera: Bethylidae), a larval parasitoid of Tribolium species, in a four-chamber olfactometer. H. sylvanidis is reported as a cosmopolitan parasitoid of Coleopteran including two major pests of stored products, the confused flour beetle Tribolium confusum and the red flour beetle T. castaneum. Our study reveals that the host complexes of both Tribolium species and different living host stages attract naive H. sylvanidis females, whereas no reaction was observed to uninfested substrates. Our findings may contribute to the development of biological control strategies of T. castaneum and T. confusum with parasitoids.
•The host complexes of Tribolium release volatile chemical signals, which are attractive for naive H. sylvanidis females.•Naive wasps did not react to uninfested whole grains and flour, but to most of the host stages of both beetle species.•First to second instar larvae of Tribolium are used by H. sylvanidis for feeding, fourth instar larvae for oviposition.•H. sylvanidis females are synovigenic.•In our experiments significantly more eggs were placed on larvae of T. castaneum as compared to T. confusum.