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Oviposition of the ragwort flea beetle, Longitarsus flavicornis (Stephens) (Coleoptera: Chrysomelidae), in relation to the phenology of ragwort, Senecio jacobaea L. (Asteraceae)

Citation

Potter, KJB and Ireson, J and Allen, GR, Oviposition of the ragwort flea beetle, Longitarsus flavicornis (Stephens) (Coleoptera: Chrysomelidae), in relation to the phenology of ragwort, Senecio jacobaea L. (Asteraceae), Biological Control, 30, (2) pp. 404-409. ISSN 1049-9644 (2004) [Refereed Article]

DOI: doi:10.1016/j.biocontrol.2004.02.003

Abstract

Wick-wiping of herbicides in summer to kill flowering ragwort and reduce seed production is the current recommendation for the integration of herbicide use and biological control using Longitarsus flavicornis (Stephens) in Tasmania, Australia. Ragwort rosettes remain undamaged by wick-wiping and their survival provides a food source for L. flavicornis. This recommendation has always been based on the assumed negative impact of boom-sprayed herbicides on L. flavicornis without the availability of supporting data. Vacuum collections at a site at Franklin, Tasmania, showed that over 80% of adult L. flavicornis occurred on rosettes rather than on flowering plants. Glasshouse choice-trials of L. flavicornis oviposition behavior showed that over 95% of eggs were laid around rosettes rather than on flowering plants. These results now provide supporting evidence for the validity of the current integrated control strategy for ragwort. Reasons for .the habitat preference by L. flavicornis of rosettes over flowering plants and the implications for the survival and increase of this biological control agent are discussed. ©2004 Elsevier Inc. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary Biology
Research Field:Evolutionary Biology not elsewhere classified
Objective Division:Environment
Objective Group:Control of Pests, Diseases and Exotic Species
Objective Field:Control of Animal Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
Author:Potter, KJB (Dr Karina Potter)
Author:Ireson, J (Dr John Ireson)
Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:27160
Year Published:2004
Web of Science® Times Cited:3
Deposited By:Agricultural Science
Deposited On:2004-08-01
Last Modified:2005-06-10
Downloads:0

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