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Overwintering sites of Chrysophtharta bimaculata (Olivier) (Coleoptera : Chrysomelidae) in commercially managed Eucalyptus obliqua forests
Citation
Clarke, AR and Shohet, D and Patel, VS and Madden, JL, Overwintering sites of Chrysophtharta bimaculata (Olivier) (Coleoptera : Chrysomelidae) in commercially managed Eucalyptus obliqua forests, Australian Journal of Entomology, 37, (2) pp. 149-154. ISSN 1326-6756 (1998) [Refereed Article]
DOI: doi:10.1111/j.1440-6055.1998.tb01562.x
Abstract
Chrysophtharta bimaculata is a serious pest of eucalypt forests in Tasmania. The beetle overwinters as a diapausing adult, but it is poorly documented whether it forms overwintering aggregations or where it shelters. During winter 1992, we searched 386 possible overwintering sites for C. bimaculata in Eucalyptus obliqua forests. Fourteen types of habitat were identified, of which clumps of Gahnia grandis sheltered the greatest mean number of insects (3.31 ± 0.72 insects/plant, n = 65 plants), while bracken fern litter sheltered the least (0.14 ± 0.14 insects/sample, n = 7, 1 m 2 quadrat samples). Of the 14 habitat types, all except two (under the bark of eucalypt stags and in G. grandis clumps) were more often unoccupied. Beetles were more commonly found on mature forest edges or in logged and regenerating forests; few were found within mature forests. Our results show that C. bimaculata rarely forms overwintering aggregations of greater than 20 individuals per site, nor does it appear to have a significant pre-diapause dispersal.
Item Details
Item Type: | Refereed Article |
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Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Forestry sciences |
Research Field: | Forest health and pathology |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Forestry |
Objective Field: | Softwood plantations |
UTAS Author: | Clarke, AR (Dr Clarke) |
UTAS Author: | Shohet, D (Mr Shohet) |
UTAS Author: | Patel, VS (Mr Vinu Patel) |
UTAS Author: | Madden, JL (Dr John Madden) |
ID Code: | 13213 |
Year Published: | 1998 |
Web of Science® Times Cited: | 4 |
Deposited By: | CRC for Forestry |
Deposited On: | 1998-08-01 |
Last Modified: | 2011-08-08 |
Downloads: | 0 |
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