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 1990 CSIRO
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 Type:||Refereed Article|
|Research Division:||Agricultural, Veterinary and Food Sciences|
|Research Group:||Forestry sciences|
|Research Field:||Forest health and pathology|
|Objective Division:||Environmental Management|
|Objective Group:||Terrestrial systems and management|
|Objective Field:||Control of pests, diseases and exotic species in terrestrial environments|
|UTAS Author:||Allen, GR (Associate Professor Geoff Allen)|
|Web of Science® Times Cited:||21|
|Deposited By:||Tasmanian Institute of Agriculture|
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