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

---

An advanced metabolomic approach on grape skins untangles cultivar preferences by Drosophila suzukii for oviposition

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: Aug. 21, 2024

Insects’ host preferences are regulated by multiple factors whose interactions only partly understood. Here we make use of an in-depth, untargeted metabolomic approach combining molecular networking (MN) and supervised Analysis variance Multiblock Orthogonal Partial Least Squares (AMOPLS) to untangle egg-laying Drosophila suzukii , invasive, highly polyphagous destructive fruit pest originating from Southeast Asia. Based on behavioural experiments in the laboratory as well field observation, selected eight genetically related Vitis vinifera cultivars (e.g., Ancellotta, Galotta, Gamaret, Gamay, Gamay précoce, Garanoir, Mara Reichensteiner) exhibiting significant differences their susceptibility toward D. . The two most least attractive red were chosen for further analyses grape skins. combination MN statistical AMOPLS findings with semi-quantitative detection information enabled us identify flavonoids interesting markers attractiveness four studied towards Overall, dihydroflavonols accumulated unattractive cultivars, while richer flavonols. Crucially, both flavonols abundant metabolites analysis extracted molecules skin. We discuss how these flavonoid classes might influence behaviour females they could serve potential infestations grapes that can be potentially extended other fruits. believe our novel, integrated analytical also applied study biological relationships characterised evolving parameters.

Language: Английский

---

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

---

A novel sustainable biocide against the fruit fly Drosophila suzukii made from orange peels

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Nov. 14, 2024

Abstract Drosophila suzukii ( D. ), a pervasive pest originating from Southeast Asia, presents substantial risk to global agriculture. The ability of the female flies lay eggs within fruits varying maturity stages, combined with accelerated offspring development warmer climates, results in rapid population growth. This poses significant challenges for fruit production and viticulture, exacerbated by increasing prevalence pesticide resistance. We propose solution this growing issue using an attract-and-kill approach making use upcycled organic waste materials made orange peels. Specifically, we have tested innovative salty peel product (OPP) choice experiment, which OPP hydrogel (control) were available Petri dishes situated beneath red wine grapes. number dead both counted each day fly maggots inside berries extracted after four days. Since covered lid, only selected on basis olfactory cues. Our showed higher captured containing compared those control. Furthermore, notable reduction was observed grapes located above closer Dilution followed lower count flies. In additional experiments, concentration NaCl found be positively correlated suggests important lethal effect caused high salt concentrations. final also commercially-available attractant called Drosalure™, resulted slightly attractiveness . These findings suggest that holds potential as cost-efficient eco-friendly biocide material. offered traps equipped small entry holes is safe bees may replace other less control measures vineyards.

Language: Английский

---

Oviposition Preference and Developmental Performance of Drosophila suzukii on Different Cherry Cultivars

Insects, Journal Year: 2024, Volume and Issue: 15(12), P. 984 - 984

Published: Dec. 11, 2024

Drosophila suzukii is a major pest of sweet cherries. In this study, we evaluated its oviposition preferences across six cherry cultivars and assessed the effects fruit traits on growth development. Significant differences in color, firmness, sugar content were observed among ripeness stages. The highest rates recorded for “Hongdeng” (HD) “Burlat” (BLT) both non-choice (HD: 31.9 ± 2.0 eggs/cherry; BLT: 31.3 1.9 eggs/cherry) choice 32.4 3.2 27.6 tests, largely influenced by color. While developmental parameters showed slight variation cultivars, significant pupation (ranging from 0.80 to 0.89) survival 0.51 0.62), with being cultivar. correlation analysis revealed that darker color—characterized lower lightness (L*), chromaticity (b*), higher color index red grapes (CIRG)—positively rates. Although other correlations not significant, positively correlated sweetness negatively firmness. These findings enhance our understanding how influence D. behavior, providing critical insights management strategies production.

Language: Английский

---

Asymmetric oviposition behaviour between Drosophila suzukii and Drosophila subpulchrella suggests competition for the shared niche in their native range

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

Published: Dec. 22, 2024

Abstract Release from competitors is one of the mechanisms ascribed to ecological success invasive species outside their native range (competitive release hypothesis). However, studies describing natural in homeland are limited. Drosophila suzukii , spotted‐wing drosophila, an pest small fruits expanding its worldwide, whereas subpulchrella most closely related D. remains endemic . inferior terms host usage capability, and it has not been considered as a major competitor This study examined interaction between two egg‐laying behaviour. A field survey revealed that 11% wild berries were co‐infected by both species. In laboratory experiments, avoided oviposition substrates had already oviposited either conspecific or females, did show any preference/avoidance toward asymmetric indicates may have negative effect on propagation niche‐sharing homeland, raising possibility competition with helped expansion populations invaded areas.

Language: Английский

---