Annals of the Entomological Society of America (2013) 106, 485-490

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Nik G. Wiman and Vincent P. Jones (2013)
Attack biology and egg maturation strategy of two tachinid parasitoids of leafroller (Lepidoptera: Tortricidae) pests in tree fruit
Annals of the Entomological Society of America 106 (4), 485-490
Abstract: Reproductive biology, including mode of attack and egg maturation, has not been described for the leafroller (Lepidoptera: Tortricidae) parasitoids Nemorilla pyste (Coquillett) and Nilea erecta (Walker) (Diptera: Tachinidae). Mode of host attack is an important character for understanding evolutionary relationships in Tachinidae, and is an important consideration for biological control. In parasitic Hymenoptera, egg maturation strategy is predictive of many life-history variables, but these predictions have not been tested in other parasitoid groups. In this article, observations on the mode of attack of N. erecta and N. pyste that were acquired through the rearing of these species in the laboratory are described. The study also used dissections to examine internal reproductive physiology and obtain fecundity data for flies of different ages. Fecundity data from the dissections and from cage experiments were used to estimate the ovigeny index of the two species. N. pyste was found to be a highly synovigenic oviparous species, whereas N. erecta was found to be moderately synovigenic and ovolarviparous. Life-history associations of hymenopteran parasitoids with egg maturation strategy appeared not to apply to these tachinids.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Nik G. Wiman, Vincent P. Jones

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution


Pest and/or beneficial records:

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


Nemorilla pyste (parasitoid)
Nilea erecta (parasitoid)