The impact of the Hakea seed-moth Carposina autologa on the canopy-stored seeds of the weed Hakea sericea

Gordon, A.J.

Agriculture Ecosystems and Environment 45(1-2): 105-113

1993


ISSN/ISBN: 0167-8809
Accession: 033837034

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Abstract
The Hakea seed-moth, Carposina autologa Meyrick was released in South Africa for the biological control of Hakea sericea Schrader. The impact of the moth on the canopy-stored seeds of H. sericea was evaluated in the southwestern Cape over 3 years. The moth has reduced the mean accumulated seeds at the two study sites by 64.2% and 50.6%. It has shown a surprising ability to disperse and establish new colonies at low population levels. Although seed destruction is not severe, it is expected to contribute to the control of the weed.