The ground-nesting bee Anthophora plumipes as a model species for assessing effects of soil-mediated pesticide exposure

Apidologie, Год журнала: 2025, Номер 56(1)

Опубликована: Фев. 1, 2025

Язык: Английский

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Size-dependent responses of colony-founding bumblebee (Bombus impatiens) queens to exposure to pesticide residues in soil during hibernation

The Science of The Total Environment, Год журнала: 2024, Номер 948, С. 174852 - 174852

Опубликована: Июль 18, 2024

Bumblebees and other key pollinators are experiencing global declines, a phenomenon driven by multiple environmental stressors, including pesticide exposure. While bumblebee queens spend most of their life hibernating underground, no study to date has examined how exposure pesticide-contaminated soils might affect during this solitary phase lifecycle. We exposed Bombus impatiens (n = 303) soil treated with field-realistic concentrations two diamide insecticides (chlorantraniliprole cyantraniliprole) fungicides (boscalid difenoconazole), alone or combined, 30-week hibernation period. found that boscalid residues in doubled the likelihood surviving through colony initiation period (after successful hibernation) laying eggs. Our data also revealed complex interactions between queen body mass on aspects founding. Among others, cyantraniliprole led lethal sublethal post-hibernation effects were dependent size, larger showing higher mortality rates, delayed emergence first brood, producing smaller workers. results show depend intrinsic traits physiology challenge our understanding bees respond pesticides under environmentally realistic scenarios.

Язык: Английский

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Bumblebee (Bombus impatiens) queens prefer pesticide-contaminated soils when selecting underground hibernation sites

The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176534 - 176534

Опубликована: Сен. 25, 2024

New evidence points to substantial impacts of exposure pesticide residues in soil for a range bee taxa that have close regular contact with this substrate. Among others, the risk is high bumblebee (Bombus spp.) queens hibernating agricultural soils. An important question whether can detect and avoid pesticide-contaminated soils, or they might be attracted such agrochemical residues. To address question, we performed multiple-choice preference experiment which newly emerged impatiens) were given access arrays 36 crates treated different pesticides large mesh-covered enclosures. Five most commonly encountered soils (boscalid, chlorantraniliprole, clothianidin, cyantraniliprole, difenoconazole) selected testing at two contamination levels (lower higher), based on field-realistic estimates. Bumblebee consistently avoided pesticide-free both levels, while showing no avoidance any pesticide-treated types. At lower level, 1.3 2.4-fold less frequently average than spiked none from higher group soil. This apparent increases likelihood potential hazard during hibernation, critical highly vulnerable period their annual life cycle.

Язык: Английский

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Understanding and comparing relative pesticide risk among North American wild bees from their association with agriculture

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175378 - 175378

Опубликована: Авг. 8, 2024

In North America, approximately 21 % (739 species) of the total wild bee diversity is known to be associated with crops, species varying in extent this association. While current evaluations pesticide effects on bees primarily focus a limited subset species, new needed ensure comprehensive protection all agricultural contexts. This study introduces novel approach characterize and compare relative potential risk for their association crops. Using intrinsic vulnerability traits extrinsic factors like crop toxic loads strength, we calculated Bee-Crop Risk Scores 594 identifying those experiencing highest from exposure American agroecosystems. We discuss influence outline avenues refining our approach. As most facing across America are ground-nesters, suggests that (e.g., Osmia spp., Megachile spp.) commonly proposed as models assessments may not accurately represent

Язык: Английский

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No impact of cyantraniliprole on the hibernation success of bumble bees (Bombus terrestris audax) in a soil‐mediated laboratory exposure study

Ecology and Evolution, Год журнала: 2024, Номер 14(10)

Опубликована: Окт. 1, 2024

Abstract Increasing evidence shows that wild bees, including bumble are in decline due to a range of stressors, pesticides. Our knowledge pesticide impacts has consequently grown enable the design increasingly realistic risk assessment methods. However, one area where gaps may still hinder our ability assess full bee‐pesticide interactions is field exposure. Exposure historically been linked either direct contact with pesticides or ingestion contaminated pollen and nectar by bees. other also be exposed while using soil as an overwintering substrate. Yet how soil‐mediated exposure affects bee health lacking. Here we take first steps towards addressing this gap designing method for testing effects on queen hibernation success. We measured survival, body weight change abdominal fat content found none these responses were affected novel insecticide cyantraniliprole. study help developing standardised test route queens.

Язык: Английский

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Synthesis and antifungal activity of novel amide derivatives from quinic acid against the sweet potato pathogen Ceratocystis fimbriata

Pest Management Science, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 6, 2024

Abstract BACKGROUND Ceratocystis fimbriata is a fungal pathogen that infects sweet potato roots, producing enormous economic losses. Cyclic polyhydroxy compound quinic acid common metabolite synthesized in plant tissues, including tubers, showing weak antifungal properties. Although several O ‐acylated derivatives have been and found nature their properties explored, based on modification of the carboxylic never evaluated. RESULTS In this study, amide were via linkage amines with moiety acid. Derivatives high dipolar moments low number rotatable bonds showed greater activities toward C. vitro than chlorogenic acids. Derivative 5b , which was by coupling p ‐aminobenzoic ( ABA) acid, had greatest activity. iron(II)‐chelating reduced ergosterol content cells, causing irregularities cell wall inhibiting conidia agglutination. Application 3 m black rot symptoms potatoes 70.1%. CONCLUSIONS Collectively, derivatization from demonstrated to be suitable strategy improve compound. This study reveals new efficient for management . © 2024 Society Chemical Industry.

Язык: Английский

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Digging below the surface: Hidden risks for ground-nesting bees

Science, Год журнала: 2024, Номер 386(6723), С. 739 - 739

Опубликована: Ноя. 14, 2024

Hidden risks for ground-nesting bees.

Язык: Английский

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