Agrochemical synergism imposes higher risk to Neotropical bees than to honeybees

Royal Society Open Science, Journal Year: 2017, Volume and Issue: 4(1), P. 160866 - 160866

Published: Jan. 1, 2017

Bees are key pollinators whose population numbers declining, in part, owing to the effects of different stressors such as insecticides and fungicides. We have analysed susceptibility Africanized honeybee, Apis mellifera , stingless bee, Partamona helleri, commercial formulations deltamethrin imidacloprid. The toxicity fungicides based on thiophanate-methyl chlorothalonil were investigated individually combination, with insecticides. Results showed that bees more susceptible than honeybees. or caused low mortality, regardless concentration; however, their combination was toxic imidacloprid both species, over 400-fold for A. . There highly synergistic mortality by interactions mixture thiophanate-methyl, combined fungicide formulation mellifera, also a lesser extent P. helleri By contrast, mixtures induced high synergy but had little effect Differences physiology modes action agrochemicals discussed factors underlying differences agrochemicals.

Language: Английский

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Glyphosate is lethal and Cry toxins alter the development of the stingless bee Melipona quadrifasciata

Environmental Pollution, Journal Year: 2018, Volume and Issue: 243, P. 1854 - 1860

Published: Oct. 3, 2018

Language: Английский

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Botanical and synthetic pesticides alter the flower visitation rates of pollinator bees in Neotropical melon fields

Environmental Pollution, Journal Year: 2019, Volume and Issue: 251, P. 591 - 599

Published: May 10, 2019

Language: Английский

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The impact of four widely used neonicotinoid insecticides on Tetragonisca angustula (Latreille) (Hymenoptera: Apidae)

Chemosphere, Journal Year: 2019, Volume and Issue: 224, P. 65 - 70

Published: Feb. 18, 2019

Language: Английский

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Ethoflow: Computer Vision and Artificial Intelligence-Based Software for Automatic Behavior Analysis

Sensors, Journal Year: 2021, Volume and Issue: 21(9), P. 3237 - 3237

Published: May 7, 2021

Manual monitoring of animal behavior is time-consuming and prone to bias. An alternative such limitations using computational resources in behavioral assessments, as tracking systems, facilitate accurate long-term evaluations. There a demand for robust software that addresses analysis heterogeneous environments (such field conditions) evaluates multiple individuals groups while maintaining their identities. The Ethoflow was developed computer vision artificial intelligence (AI) tools monitor various parameters automatically. object detection algorithm based on instance segmentation implemented, allowing the under environments. Moreover, convolutional neural network implemented assess complex behaviors expanding analyses’ possibilities. heuristics used generate training data AI models automatically are described, trained with these datasets exhibited high accuracy detecting assessing behavior. employed kinematic assessments detect trophallaxis social bees. desktop applications had graphical user interface. In algorithm, processing separate from other modules, facilitating measurements an ordinary machines graphics units. useful support tool biology related fields.

Language: Английский

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Neonicotinoid effects on tropical bees: Imidacloprid impairs innate appetitive responsiveness, learning and memory in the stingless bee Melipona quadrifasciata

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 877, P. 162859 - 162859

Published: March 16, 2023

Language: Английский

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Spinosad‐mediated effects on the walking ability, midgut, and Malpighian tubules of Africanized honey bee workers

Pest Management Science, Journal Year: 2017, Volume and Issue: 74(6), P. 1311 - 1318

Published: Dec. 1, 2017

The global decline in Apis mellifera colonies is attributed to multiple factors, including pesticides. bioinsecticide spinosad was initially recognized as safe for non-target organisms; however, its toxicity has been changing this view. Here, we investigated the survival, behavioral changes, and structural changes midgut Malpighian tubules of A. treated orally with a formulation.The field-recommended concentration killed 100% bees. 5% 50% lethal concentrations (LC5 LC50 , respectively) altered activity, reducing walking distance velocity, increased resting time comparison control. caused disorganization epithelia tested organs induced oxidative stress cell death.The present work provides new insights into debate about role bioinsecticides mortality Africanized honey Even at very low concentrations, formulation toxic vital adversely affected behavior. This detailed evaluation impact on will contribute clarification disturbances probably by formulations, which can be used develop more sustainable protocols agriculture. © 2017 Society Chemical Industry.

Language: Английский

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The reduced-risk insecticide azadirachtin poses a toxicological hazard to stingless bee Partamona helleri (Friese, 1900) queens

Chemosphere, Journal Year: 2018, Volume and Issue: 201, P. 550 - 556

Published: March 6, 2018

Large-scale pesticide application poses a major threat to bee biodiversity by causing decline in populations that, turn, compromises ecosystem maintenance and agricultural productivity. Biopesticides are considered an alternative synthetic pesticides with focus on reducing potential detrimental effects beneficial organisms such as bees. The production of healthy queen stingless bees is essential for the survival reproduction hives, although it remains unknown whether biopesticides influence reproduction. In present study, we investigated biopesticide azadirachtin survival, behavior, morphology, development, queens Partamona helleri (Friese, 1900). neonicotinoid imidacloprid was used toxic reference standard. Queens were orally exposed vitro contaminated diet (containing imidacloprid) during development. Azadirachtin resulted reduced similarly imidacloprid, altered development time, caused deformations, size queens' reproductive organs. All these factors could potentially compromise colony survival. Results from study showed posed toxicological hazard P. queens.

Language: Английский

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Azadirachtin-induced antifeeding in Neotropical stingless bees

Apidologie, Journal Year: 2016, Volume and Issue: 48(3), P. 275 - 285

Published: Oct. 14, 2016

Language: Английский

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Occurrence of virus, microsporidia, and pesticide residues in three species of stingless bees (Apidae: Meliponini) in the field

The Science of Nature, Journal Year: 2020, Volume and Issue: 107(3)

Published: April 16, 2020

Language: Английский

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