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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Apis mellifera and Melipona scutellaris exhibit differential sensitivity to thiamethoxam

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Miotelo, Lucas [1] ; Mendes dos Reis, Ana Luiza [1] ; Malaquias, Jose Bruno [2] ; Malaspina, Osmar [1] ; Roat, Thaisa Cristina [1]
Total Authors: 5
[1] Univ Estadual Paulista UNESP, Inst Biociencias, Campus Rio Claro, Sao Paulo - Brazil
[2] Sao Paulo State Univ UNESP, Inst Biosci IBB, Dept Biostat, BR-18618693 Botucatu, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Environmental Pollution; v. 268, n. A JAN 1 2021.
Web of Science Citations: 1

Apis mellifera is a pollinator insect model in pesticide risk assessment tests for bees. However, given the economic and ecological importance of stingless bees such as Melipona scutellaris in the Neotropical region, as well as the lack of studies on the effect of insecticides on these bees, toxicity tests for stingless bees should be carried out to understand whether insecticides affect both species of bees in the same manner. Thus, the present study quantified the differential sensitivity of the bees M. scutellaris and A. mellifera to the oral ingestion of the insecticide thiamethoxam by determining the mean lethal concentration (LC50), mean lethal time (LT50), and their effect on the insecticide target organ, the brain. The results showed that the stingless bee is more sensitive to the insecticide than A. mellifera, with a lower LC50 of 0.0543 ng active ingredient (a.i.)/mu L for the stingless bee compared to 0.227 ng a.i./mu L, for A. mellifera. When exposed to a sublethal concentration, morphological and ultrastructural analyses were performed and evidenced a significant increase in spaces between nerve cells of both species. Thus, A. mellifera is not the most appropriate or unique model to determine the toxicity of insecticides to stingless bees. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 15/20380-8 - Ecological modelling of the larval dispersion of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Bt cotton: implications for evolution and resistance management
Grantee:José Bruno Malaquias
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/20435-5 - Modeling with game theory of behavioral / adaptive strategies of Spodoptera frugiperda and Helicoverpa armigera in Bt crops with spatio-temporal co-occurrence
Grantee:José Bruno Malaquias
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/05953-7 - Ecological Modeling of the Resistance Evolution of Spodoptera frugiperda on Bt Cotton Mediated by Seed Contamination and Temperature Increasing
Grantee:José Bruno Malaquias
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/13370-8 - How is the reaction of the Apis mellifera brain to a sublethal dose of thiamethoxam?
Grantee:Thaisa Cristina Roat
Support type: Research Grants - Young Investigators Grants