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Phenology, synchrony and host range of the Tasmanian population of Cotesia urabae introduced into New Zealand for the biocontrol of Uraba lugens

Citation

Rowbottom, RM and Allen, GR and Walker, PW and Berndt, LA, Phenology, synchrony and host range of the Tasmanian population of Cotesia urabae introduced into New Zealand for the biocontrol of Uraba lugens, BioControl: journal of the International Organisation for Biological Control, 58, (5) pp. 625-633. ISSN 1386-6141 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 International Organization for Biological Control

DOI: doi:10.1007/s10526-013-9524-0

Abstract

The population dynamics of Cotesia urabae (Austin and Allen) (Braconidae: Microgastrinae), a biological control agent from Tasmania, and its eucalypt feeding host, Uraba lugens (Walker) (Lepidoptera: Nolidae) was investigated prior to its introduction to New Zealand in 2011. Previous host range testing on potential New Zealand non-targets determined C. urabae had some potential to attack an endemic species, Nyctemera annulata (Boisduval) (Lepidoptera: Arctiidae). A closely related species in Tasmania, Nyctemera amica, was thus investigated as a potential host along with the native host U. lugens, to better understand the host range of C. urabae and the synchrony with its host in Tasmania. Adult C. urabae emerged from pupal cocoons in the field during January which confirmed a five month window in which its host, the larvae of U. lugens, was absent in the field. Experiments using sentinel N. amica and U. lugens larvae, field collections of N. amica and of larvae of other Lepidopteran species during this five month time window detected no parasitism by C. urabae. In the laboratory, host specificity testing showed reduced attack rates and no resultant C. urabae eggs or developing larvae or any successful pupation of C. urabae larvae from attacked N. amica larvae. It was concluded that N. amica is most unlikely to be a host for C. urabae in Tasmania and no evidence of any other alternative host was found.

Item Details

Item Type:Refereed Article
Keywords:host specificity trials, parasitic wasp, Uraba lugens, Cotesia urabae, New Zealand, biological control
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Forestry Pests, Health and Diseases
Objective Division:Environment
Objective Group:Control of Pests, Diseases and Exotic Species
Objective Field:Control of Animal Pests, Diseases and Exotic Species in Coastal and Estuarine Environments
Author:Rowbottom, RM (Mrs Raylea Rowbottom)
Author:Allen, GR (Associate Professor Geoff Allen)
Author:Walker, PW (Dr Paul Walker)
ID Code:86665
Year Published:2013
Web of Science® Times Cited:5
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2013-10-09
Last Modified:2014-12-17
Downloads:0

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