Interspecific competition between <i>Rhinocyllus conicus</i> and <i>Urophora soistitialis</i> L on nodding thistle in Canterbury

Authors

  • M.R. McNeill
  • C.J. Fletcher

DOI:

https://doi.org/10.30843/nzpp.2005.58.4319

Abstract

Nodding thistle receptacle weevil Rhinocyllus conicus and gallfly Urophora solstitialis attack the capitula of nodding thistle Carduus nutans L Between 31 October and 15 December 2003 the phenology of both R conicus and U solstitialis was studied at a dryland site in Canterbury Adult R conicus were more numerous than U solstitialis on capitula throughout the experiment Larvae of R conicus were first found on 11 November (15 of capitula infested) and peaked on 2 December with 53 of capitula infested Only 3 of capitula were infested by U solstitialis Adult R conicus or U solstitialis emerged from 79 of the selected primary and secondary capitula The majority of infested capitula (81) contained only R conicus 2 contained only U solstitialis while 17 contained both insect species Parasitism of R conicus by the braconid parasitoid Microctonus aethiopoides was low and occurred when most weevil eggs had been laid

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Published

2005-08-01

How to Cite

McNeill, M., & Fletcher, C. (2005). Interspecific competition between <i>Rhinocyllus conicus</i> and <i>Urophora soistitialis</i> L on nodding thistle in Canterbury. New Zealand Plant Protection, 58, 140-147. https://doi.org/10.30843/nzpp.2005.58.4319

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Papers

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