03129nas a2200193   4500008004100000020001400041245014200055210006900197260000800266300001200274490000800286520240600294653002802700100001802728700001902746700001702765700001802782856013502800       2011                        eng d  a0007-485300aArgentine stem weevil (Listronotus bonariensis, Coleoptera: Curculionidae) population dynamics in Canterbury, New Zealand dryland pasture0 aArgentine stem weevil Listronotus bonariensis Coleoptera Curculi  cJun  a295-3030 v1013 aThe Argentine stem weevil (Listronotus bonariensis) was an economically important pest in New Zealand pastures until the release of the parasitoid Microctonus hyperodae. This contribution uses historical data to investigate the regulation of the pest populations prior to, and somewhat during, the establishment of this parasitoid in dryland Canterbury, New Zealand. Thus, a significant goal of this study is to provide an L. bonariensis population dynamics baseline for any future work that aims to analyse the full effects of M. hyperodae on the weevil, now that equilibrium with the weevil host has been reached. The population dynamics of L. bonariensis, based on a life-table approach, were investigated using data collected regularly for eight years from populations in Canterbury, New Zealand. The key factor affecting end-of-season L. bonariensis density was found to be variation in second generation fourth instar prepupal and pupal mortality. This may have been caused by arrested development and ongoing mortality resulting from the onset of cooler autumnal conditions. A compensatory response was found in recruitment to the second summer weevil generation, whereby the realised fecundity of the emergent first summer generation of weevils was found to be negatively related to the density of adult weevils per ryegrass tiller. This is the first time that this has been found via long-term population analysis of L. bonariensis, although indications of this have been found elsewhere in caging, pot and small plot experiments. In this study, the effect of the parasitoid biocontrol agent Microctonus hyperodae on L. bonariensis population dynamics was unclear, as the analysis covered a period when the parasitoid Microctonus hyperodae was introduced and still establishing. It does, however, raise important questions for future analysis in terms of the interaction between parasitism and unrealised fecundity. The results in this contribution also highlighted regional differences. Overwintering mortality of adult weevils in Canterbury was constant between years, whilst earlier studies in the North Island Waikato region indicated this mortality was density dependent. In addition, the availability of tillers in endophyte-free ryegrass pastures in Canterbury had no influence on egg and early-instar larval survival, which contrasts with the finding from endophytic Waikato pastures.10aListronotus bonariensis1 aGoldson, S.L.1 aBarron, M., C.1 aKean, J., M.1 avan Koten, C.  uhttps://weevil.myspecies.info/argentine-stem-weevil-listronotus-bonariensis-coleoptera-curculionidae-population-dynamics-canterbur00706nas a2200145   4500008004100000245022100041210006900262300001200331490000700343100001800350700001800368700001900386700002000405856013500425       2005                        eng d00aHost specificity testing and suitability of a European biotype of the braconid parasitoid Microctonus aethiopoides Loan as a Biological Control agent against Sitona Lepidus (Coleoptera: Curculionidae) in New Zealand.0 aHost specificity testing and suitability of a European biotype o  a791-8130 v151 aGoldson, S.L.1 aMcNeill, M.R.1 aProffitt, J.R.1 aBarrett, B.I.P.  uhttps://weevil.myspecies.info/host-specificity-testing-and-suitability-european-biotype-braconid-parasitoid-microctonus-aethiopoid01557nas a2200205   4500008004100000020001400041245009600055210006900151260000800220300001200228490000800240520087400248653001901122100001901141700001801160700001701178700002001195700002301215856011301238       2010                        eng d  a0007-485300aThe bionomics of an invasive species Sitona lepidus during its establishment in New Zealand0 abionomics of an invasive species Sitona lepidus during its estab  cJun  a339-3460 v1003 aThe egg, larval, pupal and adult abundance of the clover root weevil Sitona lepidus Gyllenhal (Coleoptera: Curculionidae) was monitored at three sites for the first ten years following the discovery of this exotic pest in the Waikato region of New Zealand. The species went through an initial boom and bust cycle at two sites, with populations reaching up to 1800 larvae m-2. Thereafter, winter larval populations were relatively stable, ranging between 450-750 m-2. Unlike in the Northern Hemisphere, S. lepidus was found to have two generations a year in the Waikato region of New Zealand. Pasture white clover content at the time of peak adult numbers was positively related to the subsequent peak larval populations for each generation. The factors contributing to the emergence of S. lepidus as one of the most important pasture pests in New Zealand are discussed.10aSitona lepidus1 aGerard, P., J.1 aGoldson, S.L.1 aHardwick, S.1 aAddison, P., J.1 aWilloughby, B., E.  uhttps://weevil.myspecies.info/bionomics-invasive-species-sitona-lepidus-during-its-establishment-new-zealand00609nas a2200157   4500008004100000245010700041210006900148300000600217490000700223100002300230700002100253700001800274700001900292700001800311856012200329       1999                        eng d00aPotential for impact of Microctonus spp. (Hymenoptera: Braconidae) outside the target host environment0 aPotential for impact of Microctonus spp Hymenoptera Braconidae o  a50 v221 aBarratt, B., I. P.1 aFerguson, C., M.1 aGoldson, S.L.1 aPhillips, C.B.1 aMcNeill, M.R.  uhttps://weevil.myspecies.info/potential-impact-microctonus-spp-hymenoptera-braconidae-outside-target-host-environment