Publications

insect grazing on eucalyptus in response to variation in leaf tannins and nitrogen.	many species of eucalyptus, one of the dominant genera in australian forests and woodlands, contain high levels of tannins and other phenols and are also heavily damaged by grazing insects. these phenols do not appear to affect insect attack because a wide range of concentrations of condensed tannins and other phenols in leaves of 13 eucalyptus sp. influenced neither feeding rates of paropsis atomaria larvae, nor their nitrogen use efficiencies. we discuss reasons why tannins may not appreciably ...	1977	28308647
energy and nitrogen budgets for larval and aduit paropsis charybdis stål (coleoptera: chrysomelidae) feeding on eucalyptus viminalis.	\| (1) paropsis charybdis, the eucalyptus tortoise beetle, is a serious defoliator of several eucalyptus species in new zealand. a series of laboratory experiments demonstrated the growth characteristics of larvae and adults when feeding on e. viminalis at 20°c. these were used as the data bases for quantifying its trophic relationships in terms of dry matter, energy and nitrogen. (2) the four larval stages lasted 4.0, 2.5, 3.0 and 9.5 days. growth was exponential until the second day of the four ...	1984	28311054
effects of food quality, particularly nitrogen concentrations, of eucalyptus blakelyi foliage on the growth of paropsis atomaria larvae (coleoptera: chrysomelidae).	five groups of e. blakelyi seedlings were differentially fertilized to obtain a range of n concentrations from 0.8-3.0% dry wt in the foliage. groups of p. atomaria larvae were reared from eclosion to the prepupal stage on these seedlings. the effects on larval growth and development caused by foliar concentrations of n, moisture content, and tannins and leaf toughness were measured. pupal dry weight and development time of p. atomaria did not differ between those reared on foliage with n levels ...	1985	28311863
effects of nitrogen concentrations of eucalyptus blakelyi foliage on the fecundity of paropsis atomaria (coleoptera: chrysomelidae).	the concentration of nitrogen in the foliage of eucalyptus blakelyi strongly influenced both the total number of eggs laid and the rate of production of eggs by female paropsis atomaria, a chrysomelid defoliator of eucalyptus spp. females feeding on foliage with low levels of nitrogen laid fewer eggs at a slower rate than those feeding on foliage with high levels of nitrogen. an increase from 1.5% to 4.0% of nitrogen in the foliage increased the total number of eggs laid by 500% and the rate of ...	1985	28310908
methyl jasmonate does not induce changes in eucalyptus grandis leaves that alter the effect of constitutive defences on larvae of a specialist herbivore.	the up-regulation of secondary metabolic pathways following herbivore attack and the subsequent reduction in herbivore performance have been identified in numerous woody plant species. eucalypts constitutively express many secondary metabolites in the leaves, including terpenes and formylated phloroglucinol compounds (fpcs). we used clonal ramets from six clones of eucalyptus grandis and two clones of e. grandis x camaldulensis to determine if methyl jasmonate (meja) treatment could induce chang ...	2008	18481100
corymbia species and hybrids: chemical and physical foliar attributes and implications for herbivory.	hybridization is an important biological phenomenon that can be used to understand the evolutionary process of speciation of plants and their associated pests and diseases. interactions between hybrid plants and the herbivores of the parental taxa may be used to elucidate the various cues being used by the pests for host location or other processes. the chemical composition of plants, and their physical foliar attributes, including leaf thickness, trichome density, moisture content and specific ...	2009	19777311
two new species of chrysomelobia regenfuss, 1968 (acariformes: podapolipidae) from paropsis charybdis stål (coleoptera: chrysomelidae).	two new species of chrysomelobia regenfuss, 1968, c. alleni n. sp. and c. intrusus n. sp., are described from tasmanian specimens of the eucalyptus leaf beetle paropsis charybdis stål. this beetle is now known to host three species of chrysomelobia, the other being chrysomelobia pagurus seeman, 2008, which is recorded from tasmania for the first time. thus, the three species of paropsis olivier known to have podapolipid mites each have three mite species from three separate lineages of chrysomel ...	2013	24163026
responses of leaf beetle larvae to elevated [co₂] and temperature depend on eucalyptus species.	it is essential to understand the combined effects of elevated [co2] and temperature on insect herbivores when attempting to forecast climate change responses of diverse ecosystems. plant species differ in foliar chemistry, and this may result in idiosyncratic plant-mediated responses of insect herbivores at elevated [co2] and temperature. we measured the response of the eucalypt leaf beetle paropsis atomaria (coleoptera: chrysomelidae) feeding on eucalyptus tereticornis and eucalyptus robusta. ...	2015	25526844
climate change, nutrition and immunity: effects of elevated co2 and temperature on the immune function of an insect herbivore.	balanced nutrition is fundamental to health and immunity. for herbivorous insects, nutrient-compositional shifts in host plants due to elevated atmospheric co2 concentrations and temperature may compromise this balance. therefore, understanding their immune responses to such shifts is vital if we are to predict the outcomes of climate change for plant-herbivore-parasitoid and pathogen interactions. we tested the immune response of paropsis atomaria olivier (coleoptera: chrysomelidae) feeding on ...	2016	26678330
oxidizable phenolic concentrations do not affect development and survival of paropsis atomaria larvae eating eucalyptus foliage.	insect folivores can cause extensive damage to plants. however, different plant species, and even individuals within species, can differ in their susceptibility to insect attack. polyphenols that readily oxidize have recently gained attention as potential defenses against insect folivores. we tested the hypothesis that variation in oxidizable phenolic concentrations in eucalyptus foliage influences feeding and survival of paropsis atomaria (eucalyptus leaf beetle) larvae. first we demonstrated t ...	2017	28367596
correction to: oxidizable phenolic concentrations do not affect development and survival of paropsis atomaria larvae eating eucalyptus foliage.	ian wallis was inadvertently omitted as an author in this study. ian wallis assisted with the collection of the leaf samples that were used in this study, and built the chambers that the insects were housed in.	2017	28983845