Author:
Goldson S.L.,Proffitt J.R.,McNeill M.R.,Phillips C.B.,Barlow N.D.,Baird D.B.
Abstract
AbstractField enclosure and laboratory cage experiments designed to measure the impact of the parasitoidMicroctonus hyperodaeLoan on the Argentine stem weevil,Listronotus bonariensis(Kuschel) have shown that under high parasitoid pressure, there is significant weevil mortality without obvious parasitism. Parasitoid-exposed, but unparasitized portions of caged populations died at rates significantly higher than both the parasitized weevils from the same population and the unexposed controls. Unexpectedly, parasitized weevils had the lowest mortality rates (prior to larval parasitoid emergence). It was of ecological significance that this mortality effect was detected under field conditions using several years of empirically-collected population dynamics data. Under both field and laboratory conditions this mortality was found to occur within shorter time intervals than that required for full parasitoid larval development; thus it could not be attributed to the mortality that occurs after the emergence of prepupal parasitoids. The mechanism for this mortality remains undetermined, although it could possibly be linked to pseudoparasitism.
Publisher
Cambridge University Press (CUP)
Subject
Insect Science,Agronomy and Crop Science,General Medicine
Reference27 articles.
1. The potential of parasitoid strains in biological control: Observations to date on Microctonus spp. intraspecific variation in New Zealand
2. Hodgson D.J. , Potter M.A. , Lovei G.L. , McNeill M.R. & Goldson S.L. (1993) The effects of water, glucose and pollen as dietary components on the longevity of adult Microctonus hyperodae (Hymenoptera: Braconidae, Euphorinae), a parasitoid of Listronotus bonariensis (Coleoptera: Curculionidae). Proceedings of the 6th Australasian Conference on Grassland Invertebrate Ecology, 384–390.
3. Linear patterns of dispersal and build up of the introduced parasitoidMicroctonus hyperodae(Hymenoptera: Braconidae) in Canterbury, New Zealand
4. Goldson S.L. , McNeill M.R. & Proffitt J.R. (1993b) Unexplained mortality amongst unparasitized Listronotus bonariensis in the presence of the parasitoid Microctonus hyperodae under caging conditions. Proceedings of the 6th Australasian Conference on Grassland Invertebrate Ecology, 355–362.
5. Goldson S.L. & Proffitt J.R. (1990) The effect of storage on the ability of Argentine stem weevil to sustain development of the parasitoid Microctonus hyperodae. Proceedings of the 43rd New Zealand Weed and Pest Control Conference, 339–342.
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