Negative effects of strain hybridisation on the biocontrol agent <i>Microctonus aethiopoides</i>


  • S.L. Goldson
  • M.R. McNeill
  • J.R. Proffitt



Clover root weevil Sitona lepidus remains a threat to New Zealands whiteclover based pastoral production system Unfortunately the New Zealandestablished strain of M aethiopoides (originally from Morocco) active against Sitona discoideus has been found to have no potential as a control agent against S lepidus It was therefore unexpected that a European strain of M aethiopoides was found to be highly active against the weevil This contribution examined the effect of Moroccan x European strain crosses on the value of M aethiopoides as a control agent of S discoideus and S lepidus It was found that such strain hybridisation led to significant reductions in the impact of this parasitoid species as a control agent against either S lepidus or S discoideus The widespread implications of this finding for biological control are discussed




How to Cite

Goldson, S., McNeill, M. and Proffitt, J. 2003. Negative effects of strain hybridisation on the biocontrol agent &lt;i&gt;Microctonus aethiopoides&lt;/i&gt;. New Zealand Plant Protection. 56, (Aug. 2003), 138–142. DOI:




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