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Desiccation and egg viability of the ragwort flea beetle, Longitarsus flavicornis (Coleoptera: Chrysomelidae)


Potter, KJB and Ireson, J and Allen, GR, Desiccation and egg viability of the ragwort flea beetle, Longitarsus flavicornis (Coleoptera: Chrysomelidae), Biocontrol Science and Technology, 20, (3) pp. 311-316. ISSN 0958-3157 (2010) [Refereed Article]

DOI: doi:10.1080/09583150903514031


© 2010 Commonwealth Scientific and Industrial Research Organisation (CSIRO). A study was conducted to investigate the effect of desiccation on the survival of eggs of Longitarsus flavicornis. Eclosion of L. flavicornis eggs in laboratory trials decreased with increasing desiccation time between 0 days (93% hatching) and 42 days (no egg hatching) at 50±2% relative humidity and 23±2°C. Probit analysis indicated that 25, 50 and 99% mortality of L. flavicornis eggs occurred after 5.7, 9.3 and 50.4 days desiccation, respectively. Egg development varied between a minimum of 8 days at 7 days desiccation to a maximum of 15 days at 28 days desiccation. Hatching span did not differ between treatments with all eggs hatching within 12 days of each other. A relative humidity of 88-100% was measured under ragwort rosettes in non-drought field conditions. This would be expected to facilitate successful egg eclosion. However, the occurrence of summer drought could be detrimental to egg survival.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture protection (incl. pests, diseases and weeds)
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Evaluation, allocation, and impacts of land use
UTAS Author:Potter, KJB (Dr Karina Potter)
UTAS Author:Ireson, J (Dr John Ireson)
UTAS Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:59504
Year Published:2010
Web of Science® Times Cited:1
Deposited By:Agricultural Science
Deposited On:2009-12-03
Last Modified:2011-04-14

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