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Natural enemies of Paropsis atomaria Olivier (Coleoptera: Chrysomelidae) in south-eastern Queensland eucalypt plantations

Nahrung, H.F. and Duffy, M.P. and Lawson, S.A. and Clarke, A.R. (2008) Natural enemies of Paropsis atomaria Olivier (Coleoptera: Chrysomelidae) in south-eastern Queensland eucalypt plantations. Australian Journal of Entomology, 47 (3). pp. 188-194.

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Article Link(s): http://dx.doi.org/10.1111/j.1440-6055.2008.00656.x

Publisher URL: http://www3.interscience.wiley.com/cgi-bin/home

Abstract

A field survey for natural enemies of Paropsis atomaria was conducted at two south-eastern Queensland Eucalyptus cloeziana plantation sites during 2004-2005. Primary egg and larval parasitoids and associated hyperparasitoids were identified to genus or species, and parasitism rates were determined throughout the season. Predators were identified to family level but their impact was not quantified. P. atomaria adults were also examined as potential hosts for parasitic mites and nematodes. An undescribed species of Neopolycystus (Pteromalidae) was the major primary egg parasitoid species reared from egg batches, parasitising half of all egg batches collected. Three hyperparasitoid species (Baeoanusia albifunicle (Encyrtidae), Neblatticida sp. (Encyrtidae) and Aphaneromella sp. (Platygasteridae) were present, representing around one-quarter to one-third of all emergent wasps; this is the first host association record for Neopolycystus-B. albifunicle. In contrast to populations of P. atomaria from the Australian Capital Territory, primary larval parasitism was very low, around 1%, and attributable only to the tachinid flies Anagonia sp. and Paropsivora sp. However, the presence of the sit-and-wait larval hyperparasitoid, Perilampus sp. (Perilampidae) was high, emerging from around 17% of tachinid pupae, with planidia infesting a further 40% of unparasitised hosts. Three species of podapolipid mites parasitised sexually mature P. atomaria adults, while no nematodes were found in this study. Spiders were the most common predators and their abundance was positively correlated with P. atomaria adult and egg numbers. Although natural enemy species composition was identical between our two study sites, significant differences in abundance and frequency were found between sites.

Item Type:Article
Additional Information:© The State of Queensland through its Department of Primary Industries and Fisheries.
Keywords:Eucalyptus cloeziana; Neopolycystus; Paropsine.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Science > Zoology > Invertebrates > Insects
Plant pests and diseases > Individual or types of plants or trees
Forestry
Deposited On:02 Feb 2009 03:52
Last Modified:18 Apr 2011 05:39

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