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Establishment of the peanut bruchid (Caryedon serratus) in Australia and two new host species, Cassia brewsteri and C. tomentella

journal contribution
posted on 06.12.2017, 00:00 by D Cunningham, Kerry WalshKerry Walsh
The distribution of Caryedon serratus, the peanut (groundnut) bruchid, on 2 Australian native plants, Cassia brewsteri and C. tomentella, was documented over 2 years. Caryedon serratus was observed across the central and northern parts of the range of C. brewsteri (latitudes 19.258–24.140°S) and at least part of the range of C. tomentella (as far as 24.427°S). Seed loss to C. serratus in these species assessed across all collection sites was 40 ± 8.0% (mean ± s.e.). Where the bruchid was detected at a given site, 72 ± 8.6% of pods on 71 ± 8.5% of trees were affected. Additional distribution points and other potential host species from previous C. serratus collections in the Australian National Insect Collection (ANIC) are reported. The combined data were used to predict a potential range for the bruchid across the dry tropics of Australia. No reports of migration to cultivated or stored peanut (Arachis hypogaea) in Australia were located. Further investigation of the potential impact of this bruchid on the Australian peanut industry is recommended. A potentially beneficial aspect of C. serratus establishment may be the biological control of Acacia nilotica (prickly acacia) in Australia.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

42

Issue

1

eISSN

1836-5787

ISSN

0816-1089

Location

Melbourne

Publisher

CSIRO

Language

en-aus

Peer Reviewed

Yes

Open Access

No

Era Eligible

No

Journal

Australian journal of experimental agriculture.