Modelling thermal reaction norms for development and viability in Drosophila suzukii under constant, fluctuating and field conditions

Journal of Thermal Biology, Journal Year: 2024, Volume and Issue: 123, P. 103891 - 103891

Published: June 15, 2024

Phenological models for insect pests often rely on knowledge of thermal reaction norms. These may differ in shape depending developmental conditions (e.g. constant vs. fluctuating) and other factors such as life-stages. Here, we conducted an extensive comparative study the norms development viability invasive fly, Drosophila suzukii, under fluctuating regimes. Flies, were submitted to 15 different temperatures (CT) ranging from 8 35 °C. We compared responses CT with patterns observed temperature (FT) tested several equations performance curves various obtain limits degree-day estimations. To validate model's predictions, phenology was monitored two artificial field-like natural outdoor cages during spring winter. Thermal norm egg pupa broader than that adult. FT yielded a breadth CT, extended towards colder side, consistent our field observations Models resulting both made accurate predictions long remained within linear part rate curve. Under cold winter conditions, model based data more predictions. Model failed predict adult's emergence also document first record adult throughout D. suzukii. Population dynamics suzukii are all summer phenotype CT. Accounting variations between seasonal phenotypes, stages, (CT FT) could improve predictive power models.

Language: Английский

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The apparent seasonal biphenism in Drosophila suzukii stems in reality from continuous reaction norms

Pest Management Science, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

Abstract The spotted wing drosophila (SWD) is supposed to show only two distinct seasonal phenotypes: the dark, diapausing winter morph (WM) and light, reproductively active summer (SM). It unclear if these phenotypes result from a true developmental switch or expression of extreme continuous thermal reaction norms. This study aims investigate this question by examining traits across range temperatures. Using 12 temperatures (8 30 °C), we assessed including viability, growth, morphology, cold tolerance, metabolic rate, ovarian maturation. Gradual increases in temperature induced gradual changes all traits, indicating classical nonlinear Low (14 °C below) produced flies with extended development, dark color, larger size, increased reduced metabolism, delayed oogenesis, characteristic WM. Given months required for emergence egg maturation at cold, generations SWD may develop discrete environments resulting an apparent biphenism. What appears be (WM SM) actually implies need precise terminology SWD. We recommend using terms like ‘winter‐acclimated’ ‘winter phenotype’ rather than morph’. © 2024 Author(s). Pest Management Science published John Wiley & Sons Ltd on behalf Society Chemical Industry.

Language: Английский

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Urban ecology of Drosophila suzukii

Urban Ecosystems, Journal Year: 2024, Volume and Issue: 27(5), P. 1983 - 2004

Published: June 4, 2024

Language: Английский

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Winter fruit contribution to the performance of the invasive fruit fly Drosophila suzukii under different thermal regimes

Insect Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Polyphagous insect species develop using multiple host plants. Often considered beneficial, polyphagy can also be costly as nutritional quality may vary. Drosophila suzukii (Matsumura) is an invasive that on numerous fruit over the annual cycle. Here, we assessed contribution of winter-available to development seasonal populations D. suzukii, under fluctuating late winter/early spring temperature regimes. We infested artificial diet and three suitable available in (Aucuba japonica, Elaeagnus ×submacrophylla, Viscum album) with larvae regimes: constant 20 °C, controlled regime 8-15 °C (12 h light at 8 12 dark 15 °C), uncontrolled outdoor during spring. As expected, fly performance was impaired by early spring-like environmental conditions, whatever diet, winter were suboptimal diets compared thermal regime. However, cold regimes, ranking supporting best changed, highlighting occurrence physiological trade-offs. Winter-acclimated females preferentially oviposited A. japonica and/or E. regime, which does not support preference-performance hypothesis. This finding discussed context management strategies.

Language: Английский

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Four Neurotoxic Insecticides Impair Partner and Host Finding in the Parasitoid Leptopilina heterotoma and Bioactive Doses Can Be Taken up Via the Host

Journal of Chemical Ecology, Journal Year: 2025, Volume and Issue: 51(1)

Published: Jan. 29, 2025

Abstract In modern agriculture, control of insect pests is achieved by using insecticides that can also have lethal and sublethal effects on beneficial non-target organisms. Here, we investigate acute toxicity four the males’ sex pheromone response female host finding ability Drosophila parasitoid Leptopilina heterotoma . The nicotinic acetylcholine receptor antagonists acetamiprid, flupyradifurone sulfoxaflor, as well acetylcholinesterase inhibitor dimethoate were applied topically acetone solutions. Males treated with all no longer preferred in a T-olfactometer. Duration wing fanning, an element pheromone-mediated male courtship behavior, was reduced insecticides. females to orientate towards host-infested feeding substrate not affected acetamiprid tested dose range. However, treatment dimethoate, sulfoxaflor resulted loss females’ preference for odor. At lowest doses interfering olfactory abilities L. this study (acetamiprid: 0.21 ng, dimethoate: 0.105 flupyradifurone: 2.1 ng sulfoxaflor: ng), ≥ 90% wasps survive insecticide treatment. Male responses disturbed those had developed D. melanogaster larvae reared dimethoate-treated medium at levels. Hence, sufficient interfere chemical orientation be taken up via food chain.

Language: Английский

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Environmental factors driving infestations of a keystone winter fruit by an invasive and a native fruit fly

Arthropod-Plant Interactions, Journal Year: 2024, Volume and Issue: 18(5), P. 867 - 880

Published: May 27, 2024

Language: Английский

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Biomonitoring of biocontrol across the full annual cycle in temperate climates: Post‐harvest, winter and early‐season interaction data and methodological considerations for its collection

Agricultural and Forest Entomology, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

Abstract Conservation biocontrol, the regulation of crop pests by naturally occurring biocontrol agents (e.g., predators and parasitoids), is predominantly monitored throughout periods primary growth when exert most observable impact on yields. Pest‐focused agricultural biomonitoring often overlooks post‐harvest, winter even early‐season despite significant predator–pest interactions during these that profoundly affect pest abundance and, consequently, Rapid advances in biomonitoring, particularly detection underpin provide an opportunity to reconsider how we monitor interactions. Advances must transcend methodological innovation encompass conceptual changes monitoring systems. Here, assess existing evidence supporting importance beyond for are likely evolve periods, subsequently influencing population dynamics period. We advocate a greater concerted effort establish continuous interactions, temperate climates. To facilitate this, also summarise approaches can make it possible explore extending sampling across full annual cycle might practicalities outcomes approaches. Year‐round both crops adjacent semi‐natural habitats, will previously intractable understanding dynamics, offering potential enhance our ability optimise manipulate This would manifest reduced yield losses, infestation rates disease transmission, with concomitant long‐term financial, environmental land‐use benefits.

Language: Английский

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Modelling Thermal Reaction Norms for Development and Viability in Drosophila Suzukii Under Constant, Fluctuating and Field Conditions

Published: Jan. 1, 2024

Phenological models for insect pests often rely on knowledge of thermal reaction norms. These may differ in shape depending developmental conditions (e.g. constant vs. fluctuating) and other factors such as stage endosymbionts. Here, we conducted an extensive comparative study the norms development viability invasive fly, Drosophila suzukii, under fluctuating regimes. Flies, infected or not with Wolbachia, were submitted to 15 different temperatures (CT) ranging from 8 35 °C. We compared responses CT patterns observed (FT). tested several equations performance curves various obtain limits degree-day estimations. To validate model's predictions, phenology was monitored two artificial field-like natural outdoor cages during spring winter. Development rates mostly similar flies Wolbachia. Thermal norm egg pupae larger than that adult. FT yielded a breadth CT, extended towards colder side, consistent our field observations Models resulting both made accurate predictions long temperature remained within linear part rate curve. Under cold winter conditions, model based data more predictions. Model failed predict adult's emergence also document first time successful adult throughout Population dynamics D. suzukii are all summer morphotype CT. Accounting variations between morphotypes, stages, (CT FT) could improve predictive power models.

Language: Английский

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Winter fleshy‐fruited plants are the catalysts for spring populations of an invasive fruit fly

Ecological Entomology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract Winter is a critical bottleneck period for many insects and particularly pivotal pest species, being major regulator of their populations. In winter, insect fruit pests such as the invasive fly, Drosophila suzukii , not only have to cope with harsh environmental conditions but also need find alternative resources when cultivated are scarce. This study aimed disentangle relative roles climatic, landscape local factors affecting infestation rates winter spring host plants by D. . We assessed in Aucuba japonica Elaeagnus × submacrophylla (syn. ebbingei ), Mahonia aquifolium M. Viscum album north France, between January July 2022. emerged from all plant species except The fly was that A. E. co‐occurred V. subobscura Climatic (e.g. cumulative precipitation, number frost hours), composition grassland, shrubland water cover) variables resource abundance, vegetation architecture) influenced infestation, effects varying plants. fruiting succession these five effectively provides continuum March June, which particular, plays role before commercial become available strawberries, cherries). Non‐crop should be considered integrative management strategies they could catalyse populations early season.

Language: Английский

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Harnessing Environmental DNA (eDNA) to Explore Frugivorous Interactions: A Case Study in Papaya (Carica papaya) and Pineapple (Ananas comosus)

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

Abstract Plant-animal interactions (PAIs) are critical in ecosystem function, mediating energy flow and species interactions. Traditional methods of tracking PAIs, such as morphological identification camera trapping, limited speed scalability, posing challenges for comprehensive biodiversity monitoring. Recently, environmental DNA (eDNA) metabarcoding has emerged a promising technique detecting non-destructively. This pilot study explores the application eDNA to investigate involving partially consumed intact fruits Carica papaya Ananas comosus . were performed from 36 6 fruit samples. Metabarcoding mitochondrial COI gene fragments revealed diverse range taxa, with Arthropoda, particularly insects, being most abundant. Results indicated significant differences taxonomic composition between pineapple samples, where both hold some unique well shared taxa. Furthermore, diversity also differed fruits, suggesting that serve rich sources, capturing various frugivores decomposers. Signal organisms detected through damaged allowed us capture wide array revealing insights into ecological relationships. The ASVs associated each type suggest certain taxa may showing preferences based on characteristics sugar content, texture, or chemical profile. Present work highlighted importance unraveling fruit-associated plant-animal method needs expertise, less labors, fast effective, which can be implemented monitoring economical

Language: Английский

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