Temperature-dependent performance and potential distribution of Pareuchaetes insulata, a biological control agent of Chromolaena odorata in South Africa

Uyi, Osariyekemwen; Zachariades, C.; Hill, Martin; McConnachie, Andrew

doi:10.1007/s10526-016-9760-1

Cited by 13 publications

(31 citation statements)

References 27 publications

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“…Total leaf consumption by P. insulata has been shown to be positively correlated with female pupal mass and adult fecundity (Uyi et al, 2014a). The overall survival rate for insects feeding on SAB (88.8%) and on C. odorata from Florida (87.5%) is similar to the 88% recorded in an earlier study on SAB by Uyi et al (2014a). Those insects that do not acquire proteins as adults must obtain all the reserves during their larval stage.…”

Section: Discussionsupporting

confidence: 61%

“…Total leaf consumption by P. insulata has been shown to be positively correlated with female pupal mass and adult fecundity (Uyi et al, 2014a). Total leaf consumption by P. insulata has been shown to be positively correlated with female pupal mass and adult fecundity (Uyi et al, 2014a).…”

Section: Discussionmentioning

confidence: 96%

“…However, studies on possible factors that could constrain the establishment and performance of biological control agents are often not prioritised pre-release, because they are difficult to perform, and infrequently conducted post-release to provide possible explanations for the establishment failure of biological The biology, host range, and population genetics of P. insulata have been studied (Kluge & Caldwell, 1993;Dube et al, 2014;Uyi et al, 2014a). The main features of the moth's life cycle can be summarised as follows (Uyi et al, 2014a): the golden-yellow adult female lays its pale yellow, spherical eggs in batches of 1-16 on the leaves of C. odorata (usually on the underside). A single female can produce up to 661 eggs, which hatch after an average of 4.8 days (at 25°C).…”

Section: Introductionmentioning

confidence: 99%

“…This included P. insulata, which was collected in Florida on C. odorata plants which differed in appearance and odour to SAB C. odorata. The role of climatic factors cannot yet be excluded in the poor performance of P. insulata (Uyi et al, 2014b). The role of climatic factors cannot yet be excluded in the poor performance of P. insulata (Uyi et al, 2014b).…”

Section: Introductionmentioning

confidence: 99%

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Variation in host plant has no effect on the performance and fitness‐related traits of the specialist herbivore Pareuchaetes insulata

Uyi

Hill

Zachariades

2014

Entomologia Exp Applicata

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The effect of host plant dissimilarity on insect preference and performance was tested using two morphological forms of Chromolaena odorata (L.) King & Robinson (Asteraceae) (one from Florida, USA, another from South Africa), and a specialist herbivore, Pareuchaetes insulata (Walker) (Lepidoptera: Erebidae: Arctiinae) from Florida, USA, that was introduced as a biological control agent in South Africa. Although this insect did establish at one site, of some 21 sites at which over 800 000 individuals were released, its population level in the field has remained low after an initial outbreak in 2006. To explain the poor performance of P. insulata, we hypothesised that P. insulata larvae prefer Floridian C. odorata to the southern African C. odorata, which is morphologically and probably genetically distinct, and that larvae reared on Floridian C. odorata should have higher fitness and performance. We tested this by comparing insect performance metrics on each of the two plant forms in laboratory experiments. Apart from pupal mass, which was significantly greater on southern African C. odorata, P. insulata performance metrics were similar on both plant forms; there were no significant differences in total leaf area consumed, egg and larval development, immature survival rates, feeding index, host suitability index, growth index, and fecundity between the Floridian and southern African C. odorata plants. In sum, we could not demonstrate that differences in plant forms in C. odorata are responsible for the poor performance of P. insulata in South Africa.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Variation in host plant has no effect on the performance and fitness‐related traits of the specialist herbivore Pareuchaetes insulata

Uyi

Hill

Zachariades

2014

Entomologia Exp Applicata

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“…Following the initial establishment of the Floridian population of P. insulata, a population outbreak occurred in 2006 (Zachariades et al 2011), but since then, the population has remained low and consequently its impact on C. odorata has been negligible. Although the role of climatic factors cannot yet be ruled out in the poor performance of P. insulata (Uyi et al 2014), morphological or genetic differences between the C. odorata from which P. insulata was collected in Florida, and the South African C. odorata are thought not to be important because of the equal larval and adult performance on both plant types .…”

Section: Introductionmentioning

confidence: 99%

The Life History Traits of the Arctiine MothPareuchaetes insulata, a Biological Control Agent ofChromolaena odoratain South Africa

2014

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Limited sex differences in plastic responses suggest evolutionary conservatism of thermal reaction norms: A meta-analysis in insects

et al. 2022

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Temperature has a profound effect on the growth and development of ectothermic animals. However, the extent to which ecologically driven selection pressures can adjust thermal plastic responses in growth schedules is not well understood. Comparing temperature‐induced plastic responses between sexes provides a promising but underexploited approach to evaluating the evolvability of thermal reaction norms: males and females share largely the same genes and immature environments but typically experience different ecological selection pressures. We proceed from the idea that substantial sex differences in plastic responses could be interpreted as resulting from sex‐specific life‐history optimization, whereas similarity among the sexes should rather be seen as evidence of an essential role of physiological constraints. In this study, we performed a meta‐analysis of sex‐specific thermal responses in insect development times, using data on 161 species with comprehensive phylogenetic and ecological coverage. As a reference for judging the magnitude of sex specificity in thermal plasticity, we compared the magnitude of sex differences in plastic responses to temperature with those in response to diet. We show that sex‐specific responses of development times to temperature variation are broadly similar. We also found no strong evidence for sex specificity in thermal responses to depend on the magnitude or direction of sex differences in development time. Sex differences in temperature‐induced plastic responses were systematically less pronounced than sex differences in responses induced by variations in larval diet. Our results point to the existence of substantial constraints on the evolvability of thermal reaction norms in insects as the most likely explanation. If confirmed, the low evolvability of thermal response is an essential aspect to consider in predicting evolutionary responses to climate warming.

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Temperature-dependent performance and potential distribution of Pareuchaetes insulata, a biological control agent of Chromolaena odorata in South Africa

Cited by 13 publications

References 27 publications

Variation in host plant has no effect on the performance and fitness‐related traits of the specialist herbivore Pareuchaetes insulata

Variation in host plant has no effect on the performance and fitness‐related traits of the specialist herbivore Pareuchaetes insulata

The Life History Traits of the Arctiine MothPareuchaetes insulata, a Biological Control Agent ofChromolaena odoratain South Africa

Limited sex differences in plastic responses suggest evolutionary conservatism of thermal reaction norms: A meta-analysis in insects

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