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Uraba lugens Walker (Lepidoptera: Noctuidae): larval survival and parasitoid biology in the field in South Australia

Citation

Allen, GR, Uraba lugens Walker (Lepidoptera: Noctuidae): larval survival and parasitoid biology in the field in South Australia, Journal of the Australian Entomology Society, 29, (4) pp. 301-312. ISSN 0004-9050 (1990) [Refereed Article]

Copyright Statement

Copyright 1990 CSIRO

DOI: doi:10.1111/j.1440-6055.1990.tb00367.x

Abstract

Twenty-two species were found in the parasitoid complex attacking Uraba lugens Walker: 11 primary parasitoids, 10 hyperparasitoids and 1 facultative hyperparasitoid. All immature stages of U. lugens were parasitised, with larval parasitoids killing hosts from the third instar onwards. The majority of parasitoids were found in both the summer and the winter generations of U. lugens, and at least 4 of the primary parasitoids produced more than 1 generation per generation of the host. Parasitoids were collected from hosts on several species of Eucalyptus. The longevity of adult female parasitoids in the complex varied between 8 and 254 days. Of the hyperparasitoids, many were gregarious and polyphagous, and all but 1 species parasitised the pupae of primary parasitoids.

High mortality occurred among early instar larvae of U. lugens, but older instars were much less affected by mortality factors. The survival of larvae between trees and even between different groups on the 1 tree was variable. Caging of larvae greatly increased overall survival and decreased the fluctuations in mortality between larvae on different trees. Although parasitism was very high in some individual groups, it accounted for only a small proportion of mortality of U. lugens. Hyperparasitism and the presence of many polyphagous primary parasitoids in the complex may be a contributing factor to the low levels of parasitism observed on U. lugens.

Item Details

Item Type:Refereed Article
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 Plant Pests, Diseases and Exotic Species in Forest and Woodlands Environments
Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:102690
Year Published:1990
Web of Science® Times Cited:21
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-09-03
Last Modified:2016-02-26
Downloads:0

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