Age and size thresholds for pupation and developmental polymorphism in the browntail moth, Euproctis chrysorrhoea (Lepidoptera: Lymantriidae), under conditions that either emulate diapause or prevent it

Frago, Enric; Selfa, Jesús; Pujadé-Villar, Juli; Guara, Miguel; Bauce, Éric

doi:10.1016/j.jinsphys.2009.06.013

Cited by 12 publications

(19 citation statements)

References 28 publications

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“…It has been argued that the optimal number of instars is that which maximises food acquisition while minimising the costs of moulting (Hutchinson et al, 1997). In some cases, individuals eclosing from smaller eggs are more likely to undergo additional instars (Leonard, 1970;Frago et al, 2009). In some cases, individuals eclosing from smaller eggs are more likely to undergo additional instars (Leonard, 1970;Frago et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…In general, the addition of stadia is a strategy for attaining greater (or critical) body size, whereas the subtraction of stadia is a means of speeding development or, when resources are limiting, saving the energetic cost of a moult. In some cases, individuals eclosing from smaller eggs are more likely to undergo additional instars (Leonard, 1970;Frago et al, 2009). In insects sexually dimorphic for instar number, females tend to have more instars than males (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Age‐specific maternal effects interact with larval food supply to modulate life history in Coleomegilla maculata

Vargas

Michaud

Nechols

et al. 2013

Ecological Entomology

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1. Maternal effects can modify progeny phenotypes to improve their survival under variable conditions, such as changes in food supply. In aphidophagous coccinellids, maternal effects can influence egg size, developmental rate, and final adult body size.2. Four cohorts of Coleomegilla maculata De Geer larvae were reared from four different points in their mothers' reproductive lives (1st, 12th, 24th, and 36th oviposition days) and divided into two diet treatments for rearing; 30-min daily access to eggs of Ephestia kuehniella Zeller or ad libitum.3. Progeny survival was lower on restricted food but increased over the first 12 oviposition days in both treatments, suggesting mothers did not conform to the theoretical norm of producing their 'best' progeny first.4. Larval development was delayed on the restricted diet, but there was no effect of oviposition day on total developmental time, although pupation was faster in the final cohort than in the first.5. The results suggest that mothers employ a mixed strategy and produce subsets of progeny that vary in response to food limitation. A small fraction adopt an 'optimistic' strategy and undergo an additional instar to take advantage of any possible improvement in the food supply, whereas a larger fraction adopt a 'pessimistic' strategy, forgoing an instar and the costs of a moult to pupate at a small size.6. The restricted diet increased the percentage of larvae that added or subtracted an instar, but larvae from later clutches were more likely to pupate after only three instars, independent of treatment, suggesting that a larger proportion of later-hatching progeny are maternally programmed for pessimism, as would be adaptive for larvae exploiting aphid populations in decline.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Age‐specific maternal effects interact with larval food supply to modulate life history in Coleomegilla maculata

Vargas

Michaud

Nechols

et al. 2013

Ecological Entomology

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“…E. chrysorrhoea is characterized by a peculiar life cycle. It spends about 10 months in the larval stage and overwinters as young larvae inside communal nests (Frago et al, 2009). As some other Lepidoptera, it exhibits eruptive population dynamics and represents an economically important defoliator of forests (especially oaks), orchards, and parks (Kniest and Hoffman, 1984).…”

Section: Introductionmentioning

confidence: 99%

Mesoporous silica nanoparticles SBA-15 loaded with emodin upregulate the antioxidative defense of Euproctis chrysorrhoea (L.) larvae

et al. 2017

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The study presented here aims to elucidate the effects of emodin (EO = 1,3,8-trihydroxy-6-methylanthraquinone) in its free form and when loaded into a mesoporous silica nanocarrier SBA-15 (→ SBA-15|EO) on the activities of the main antioxidative enzymes, superoxide dismutase, catalase, glutathione S-transferase, and glutathione reductase, in larvae of a polyphagous insect pest, the browntail moth Euproctis chrysorrhoea (L.). The results show that only SBA-15|EO upregulates the activities of the tested antioxidative enzymes. These results point to significant differences in the effectiveness of the compound in the free versus the loaded form.

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“…(iv) Once larvae reach late instars, colonies break up and post‐diapausing dispersive larvae start feeding independently. Larvae pupate in June after six to eight instars (Frago et al , 2009). Imagos appear approximately 1 month later; they do not feed, have a short lifespan, and lay their eggs in late July and early August.…”

Section: Introductionmentioning

confidence: 99%

Winter feeding leads to a shifted phenology in the browntail moth Euproctis chrysorrhoea on the evergreen strawberry tree Arbutus unedo

Frago

Guara

Pujadé-Villar

et al. 2010

Agri and Forest Entomology

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1 The browntail moth Euproctis chrysorrhoea is a highly polyphagous univoltine forest pest. Although its young larvae usually overwinter in diapause from early autumn to the beginning of spring, winter larval feeding has been reported when this species feeds on the evergreen woody shrub strawberry tree Arbutus unedo. 2 The present study investigated life-history traits of four populations of E. chrysorrhoea feeding on A. unedo, including phenology of the different life stages, larval feeding activity and diapause incidence. By modelling the relationship between larval size and host plant leaf persistence, elevation and mean annual temperature, we also studied larval development in ten populations of this species sampled from a range of geographical locations in Spain, from both A. unedo and deciduous hosts. 3 The results obtained revealed that on A. unedo, E. chrysorrhoea phenology has shifted: from October to March, A. unedo larvae doubled their size, whereas, on deciduous Ulmus minor and Quercus faginea, larval size did not change. General linear models demonstrated that such differences were not related to environmental variables. We also found that on A. unedo larval feeding was arrested for 2 months, with this period representing a true diapause. 4 The results obtained in the present study suggest that E. chrysorrhoea populations are phenologically adapted to their local host plants, and that the presence of foliage is a key element in the phenological shift reported on A. unedo. These results may have implications with respect to the formation of E. chrysorrhoea host races.

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Age and size thresholds for pupation and developmental polymorphism in the browntail moth, Euproctis chrysorrhoea (Lepidoptera: Lymantriidae), under conditions that either emulate diapause or prevent it

Cited by 12 publications

References 28 publications

Age‐specific maternal effects interact with larval food supply to modulate life history in Coleomegilla maculata

Age‐specific maternal effects interact with larval food supply to modulate life history in Coleomegilla maculata

Mesoporous silica nanoparticles SBA-15 loaded with emodin upregulate the antioxidative defense of Euproctis chrysorrhoea (L.) larvae

Winter feeding leads to a shifted phenology in the browntail moth Euproctis chrysorrhoea on the evergreen strawberry tree Arbutus unedo

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