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1 February 2014 What Determines Host Acceptance and Suitability in Tropical Asian Drosophila Parasitoids?
Masahito T. Kimura, Awit Suwito
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Abstract

For successful parasitism, parasitoid females must oviposit and the progeny must develop in individual hosts. Here, we investigated the determinants of host acceptance for oviposition and host suitability for larval development of Drosophila parasitoids from Bogor and Kota Kinabalu (≈1,800 km northeast of Bogor), Indonesia, in tropical Asia. Asobara pleuralis (Ashmead) from both localities oviposited frequently (>60%) in all of the drosophilid species tested, except the strain from Kota Kinabalu oviposited rarely (10%) in Drosophila eugracilis Bock & Wheeler. Leptopilina victoriae Nordlander from both localities only oviposited frequently (>77%) in species from the Drosophila melanogaster species group except D. eugracilis (<3.7%), whereas Leptopilina pacifica Novković & Kimura from Bogor oviposited frequently (>85%) only in species from the Drosophila immigrons species group. Thus, host acceptance appeared to be affected by host taxonomy, at least in Leptopilina species. Host suitability varied considerably, even among closely related drosophilid species, which suggests that the host suitability is at least in part independent of host taxonomy and that it has been determined via parasitoid-host coevolutionary interactions (i.e., arms race). Host acceptance did not always coincide with host suitability, i.e., parasitoids sometimes oviposited in unsuitable host species. Geographic origin strongly affected the host acceptance and suitability in the A. pleuralisD. eugracilis parasitoid—host pair, whereas it only weakly affected the acceptability and suitability in other parasitoid—host combinations.

© 2014 Entomological Society of America
Masahito T. Kimura and Awit Suwito "What Determines Host Acceptance and Suitability in Tropical Asian Drosophila Parasitoids?," Environmental Entomology 43(1), 123-130, (1 February 2014). https://doi.org/10.1603/EN13141
Received: 13 May 2013; Accepted: 28 November 2013; Published: 1 February 2014
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KEYWORDS
Coevolution
Drosophila
host acceptance
host suitability
parasitoid
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