Parasitism by <i>Microctonus aethiopoides</i> on a novel host <i>Listronotus bonariensis</i> in Canterbury pastures
AbstractThe parasitoids Microctonus aethiopoides and M hyperodae have been introduced as biological control agents against Sitona discoideus and Argentine stem weevil Listronotus bonariensis respectively Collections from ryegrass/white clover pastures in midCanterbury found that M aethiopoides was widespread in L bonariensis despite the weevil being a novel host Microctonus aethiopoides was recovered from 83 of the 65 sites sampled in Canterbury with parasitism rates of 0419 Studies in lucerne crops showed that M aethiopoides preferentially parasitised its natural host S discoideus although in some cases up to 10 of L bonariensis found in the lucerne were parasitised A possible reason for the prevalence of M aethiopoides in Canterbury pasture was that the widelydispersive flights of S discoideus from aestivation sites provided a source for reinfection of the parasitoid into ryegrass pasture Analysis of field parasitism suggested that parasitism of L bonariensis by M aethiopoides was negatively correlated with parasitism by M hyperodae
How to Cite
McNeill, M.R., J.M. Kean, and S.L. Goldson. “Parasitism by <i>Microctonus aethiopoides</i> on a Novel Host <i>Listronotus bonariensis</i> In Canterbury Pastures”. New Zealand Plant Protection 55 (August 1, 2002): 280–286. Accessed February 23, 2024. https://journal.nzpps.org/index.php/nzpp/article/view/3953.