Interaction of Insecticides and Fungicides in Bees

Frontiers in Insect Science, Journal Year: 2022, Volume and Issue: 1

Published: Jan. 25, 2022

Honeybees and wild bees are among the most important pollinators of both cultivated landscapes. In recent years, however, a significant decline in these has been recorded. This decrease can have many causes including heavy use biocidal plant protection products agriculture. The frequent residues bee originate from fungicides, while neonicotinoids and, to lesser extent, pyrethroids popular insecticides detected products. There is abundant evidence toxic side effects on honeybees produced by neonicotinoids, but only few studies investigated because they generally regarded as not being harmful for bees. field, variety substances taken up mixtures their combinations be lethal pollinators, depending specific group insecticide or fungicide. review discusses different major fungicide classes Fungicides inhibiting sterol biosynthesis pathway strongly increase toxicity pyrethroids. Other contrast, do appear enhance when combined with neonicotinoid pyrethroid insecticides. But knowledge possible interactions fungicides poor, particularly bees, emphasizing need further insecticide-fungicide

Language: Английский

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BioClocks UK: driving robust cycles of discovery to impact

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1918)

Published: Jan. 23, 2025

Chronobiology is a multidisciplinary field that extends across the tree of life, transcends all scales biological organization, and has huge translational potential. For UK to harness opportunities presented within applied chronobiology, we need build our network outwards reach stakeholders can directly benefit from discoveries. In this article, discuss importance rhythms health, society, economy environment, with particular focus on circadian rhythms. We subsequently introduce vision objectives BioClocks UK, newly formed research network, whose mission stimulate researcher interactions sustain discovery-impact cycles between chronobiologists, wider communities multiple industry sectors. This article part Theo Murphy meeting issue ‘Circadian in infection immunity’.

Language: Английский

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Neonicotinoids disrupt memory, circadian behaviour and sleep

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: Jan. 21, 2021

Abstract Globally, neonicotinoids are the most used insecticides, despite their well-documented sub-lethal effects on beneficial insects. Neonicotinoids nicotinic acetylcholine receptor agonists. Memory, circadian rhythmicity and sleep essential for efficient foraging pollination require signalling. The effect of field-relevant concentrations European Union-banned neonicotinoids: imidacloprid, clothianidin, thiamethoxam thiacloprid were tested Drosophila memory, rhythms sleep. Field-relevant clothianidin disrupted learning, behavioural whilst exposure only affected Exposure to imidacloprid prevented day/night remodelling accumulation pigment dispersing factor (PDF) neuropeptide in dorsal terminals clock neurons. Knockdown neonicotinoid susceptible Dα1 Dβ2 subunits mushroom bodies or neurons recapitulated like deficits memory sleep/circadian behaviour respectively. Disruption likely have far-reaching detrimental insects field.

Language: Английский

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Experimental heatwaves disrupt bumblebee foraging through direct heat effects and reduced nectar production

Functional Ecology, Journal Year: 2022, Volume and Issue: 37(3), P. 591 - 601

Published: Dec. 1, 2022

Abstract Heatwaves are an increasingly common extreme weather event across the globe and projected to surge in frequency severity coming decades. Plant‐pollinator mutualisms vulnerable due interacting effects of heat on insect pollinator foraging behaviour their forage plants. We designed experiment parse impact bumblebee mediated directly through air temperature indirectly changes plant rewards. Temperatures simulating a moderate heatwave negatively impacted bumblebees reducing proportion successful bouts, bout duration flower visitation indirect stress reduced nectar production that limited duration. Our experimental results provide mechanistic link between climate, plants pollinators suggest situ conditions from heatwaves could have profound negative consequences for colony persistence maintenance pollination services. Read free Plain Language Summary this article Journal blog.

Language: Английский

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Pesticide impacts on insect pollinators: Current knowledge and future research challenges

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176656 - 176656

Published: Oct. 2, 2024

Language: Английский

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Effects of spinetoram and glyphosate on physiological biomarkers and gut microbes in Bombus terrestris

Frontiers in Physiology, Journal Year: 2023, Volume and Issue: 13

Published: Jan. 9, 2023

The sublethal effects of pesticide poisoning will have significant negative impacts on the foraging and learning bees bumblebees, so it has received widespread attention. However, little is known about physiological spinetoram glyphosate exposure bumblebees. We continuously exposed Bombus terrestris to (2.5 mg/L) or under controlled conditions for 10 days. superoxide dismutase, glutathione-S-transferase, carboxylesterase, prophenoloxidase, α-amylase protease activities, changes in gut microbes were measured understand physiology Sublethal significantly increased dismutase activity decreased bumblebees but had no effect carboxylesterase activities. In addition, prophenoloxidase. Interestingly, we observed that neither two pesticides a dominant bacteria, altered structure fungal community, reduced relative abundance Zygosaccharomyces associated with fat accumulation. These results suggest do not affect detoxification system may bumblebee health by inhibiting energy acquisition. Our provide information low concentrations terms microbes.

Language: Английский

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Chronic larval exposure to thiacloprid impairs honeybee antennal selectivity, learning and memory performances

Frontiers in Physiology, Journal Year: 2023, Volume and Issue: 14

Published: April 20, 2023

The use of agricultural neonicotinoid insecticides has sub-lethal chronic effects on bees that are more prevalent than acute toxicity. Among these insecticides, thiacloprid, a commonly used compound with low toxicity, attracted significant attention due to its potential impact the olfactory and learning abilities honeybees. effect larval exposure thiacloprid antennal activity adult honeybees ( Apis mellifera L.) is not yet fully understood. To address this knowledge gap, laboratory-based experiments were conducted in which honeybee larvae administered (0.5 mg/L 1.0 mg/L). Using electroantennography (EAG), impacts selectivity common floral volatiles evaluated. Additionally, odor-related memory also assessed. results study reveal, for first time, decreased antenna EAG responses scents, leading increased high-dose (1.0 mg/L) group compared control (0 vs . mg/L: p = 0.042). suggest negatively affected odor-associated paired acquisition, as well medium-term (1 h) 0.019) long-term (24 0.037) amplitudes dramatically reduced following R-linalool training 0.001; 0 0.5 0.027), while activities only differed significantly between unpaired groups. Our indicated concentrations may affect perception behaviors These findings have important implications safe agrochemicals environment.

Language: Английский

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Gut microbiota composition and gene expression changes induced in the Apis cerana exposed to acetamiprid and difenoconazole at environmentally realistic concentrations alone or combined

Frontiers in Physiology, Journal Year: 2023, Volume and Issue: 14

Published: May 3, 2023

Apis cerana is an important pollinator of agricultural crops in China. In the environment, A. may be exposed to acetamiprid (neonicotinoid insecticide) and difenoconazole (triazole fungicide), alone or combination because they are commonly applied various crops. At present, our understanding toxicological effects on honey bee gut microbiomes limited. The primary objective this study was explore whether these two pesticides affect bees' microbiota analyze transcriptional head gut. study, adults were and/or by contaminated syrup at field-realistic concentrations for 10 days. Results indicated that chronic exposure did not survival food consumption, whereas decreased weight bees. 16S rRNA sequencing suggested mixture diversity index shaped composition bacteria microbiota, impact bacterial community. ITS sequence data showed neither affected fungal community structure. Meanwhile, we also observed significantly altered expression genes related detoxification immunity tissues. Furthermore, adverse effect health greater than a single mixture. Taken together, demonstrates induced changes microbiome gene expression.

Language: Английский

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Multimodal floral recognition by bumblebees

Current Opinion in Insect Science, Journal Year: 2023, Volume and Issue: 59, P. 101086 - 101086

Published: July 17, 2023

Flowers present information to their insect visitors in multiple simultaneous sensory modalities. Research has commonly focussed on presented visual and olfactory Recently, focus shifted towards additional 'invisible' information, whether modalities enhances the interaction between flowers visitors. In this review, we highlight work that addresses how multimodality influences behaviour, focussing conducted bumblebees (Bombus spp.), which are often used due both learning abilities ability use modes identify differentiate flowers. We review evidence for being able humidity, electrical potential, surface texture temperature as modalities, consider performance. mechanisms, including cross-modal transfer of occurs when bees patterns learnt one modality an without learning.

Language: Английский

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

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176534 - 176534

Published: Sept. 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.

Language: Английский

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