A mixture containing the herbicides Mesotrione and Atrazine imposes toxicological risks on workers of Partamona helleri

Araújo, Renan dos Santos; Bernardes, Rodrigo Cupertino; Martins, Gustavo Ferreira

doi:10.1016/j.scitotenv.2020.142980

Cited by 24 publications

(12 citation statements)

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“…Furthermore, the ERK 1/2 protein regulates the proliferation of intestinal steam cell (ISC) in the midgut of insects (Biteau and Jasper, 2011). Therefore, we suggest that the increased amount of cells positive for ERK 1/2 may be related to the induction of apoptotic cell death and/or the increased ISC proliferation, in an attempt to enhance midgut epithelial renewal, similarly to that reported for P. helleri exposed to a mix of herbicides (Araújo et al, 2020).…”

Section: Fipronil Induces Oxidative Stress and Cell Death And Impairs...supporting

confidence: 74%

Insecticide selectivity to the predator Podisus nigrispinus (Heteroptera: Pentatomidae) used in eucalyptus culture

Silva¹

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The control of defoliating caterpillars in forestry includes chemical and biological insect management. The predatory stink bug Podisus nigrispinus Dallas (Heteroptera: Pentatomidae) is a biological control agent, but some insecticides can affect this natural enemy, which needs risk assessment. Therefore, the selectivity of insecticides for use with non-target organisms in agricultural and forestry areas is essential for integrated pest management. The present work aimed to fill gaps about the effects of insecticides when used together with the predator P. nigrispinus. In chapter 1, the objective was to evaluate the side effects on survival, respiration, behavioral response, preference and consumption in third instar nymphs of P. nigrispinus when exposed to Bacillus thuringiensis (Bt), permethrin, tebufenozide and thiamethoxam in the laboratory. The insecticides permethrin and thiamethoxam were the most toxic to P. nigrispinus nymphs. The survival of nymphs of this predator was 93.3%, 66.7%, 56.6%, 0% and 0% in the control, treatments with tebufenozide, Bt, permethrin and thiamethoxam, respectively. Bt and the insecticides tebufenozide, permethrin and thiamethoxam reduced the respiratory rate of P. nigrispinus. Permethrin, tebufenozide and thiamethoxam affected the locomotion of this insect's nymphs. Prey treated with Bt, permethrin and thiamethoxam were less preferred by P. nigrispinus. Furthermore, the reduction in the consumption of prey, treated with neurotoxic insecticides, reduced the predatory potential of this natural enemy. Bt and tefubenozide had low toxicity for P. nigrispinus, but neurotoxic products had low compatibility with this natural enemy and, therefore, they are not recommended, with this predator, in the management of forest pests. In chapter 2 we investigated the survival, preference and consumption of prey and the histopathology of the midgut of adults of P. nigrispinus fed on prey treated with the lethal concentration (LC 50 ) of Bacillus thuringiensis (Bt), permethrin, tebufenozide and thiamethoxam. The insecticides Bt, permethrin and thiamethoxam reduced survival and prey consumption in P. nigrispinus fed on prey contaminated with these insecticides.However, the four insecticides tested, including tebufenozide, caused histological changes, such as irregular epithelial architecture, cytoplasmic vacuolization and release of cell fragments in the lumen of the midgut of P. nigrispinus. The sublethal effects of Bt, permethrin, tebufenozide and thiamethoxam on the natural enemy suggest that they should be better evaluated to be used in conjunction with P. nigrispinus for integrated pest management in forestry. Keywords: Biological control. Compatibility. Non target organism. Pesticides.

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Section: Fipronil Induces Oxidative Stress and Cell Death And Impairs...supporting

confidence: 74%

Insecticide selectivity to the predator Podisus nigrispinus (Heteroptera: Pentatomidae) used in eucalyptus culture

Silva¹

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“…However, these pesticides should be used with caution because at high doses they affect larval development in both A. m. ligustica and A. c. cerana . Herbicides are assumed to change the structure and variety of plant nectar, affecting bee populations indirectly 42, 43 …”

Section: Discussionmentioning

confidence: 99%

“…Herbicides are assumed to change the structure and variety of plant nectar, affecting bee populations indirectly. 42,43 Pesticide tolerance across species was significantly different. Aphis mellifera ligustica showed high resistance compared with A. c. cerana to all tested pesticides.…”

Section: Discussionmentioning

confidence: 99%

The effects of beta‐cypermethrin, chlorbenzuron, chlorothalonil, and pendimethalin onApis mellifera ligusticaandApis cerana ceranalarvae rearedin vitro

Qing

Liu

et al. 2021

Pest Management Science

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BACKGROUND Declines in bee populations and diversity have drawn international attention. The long‐term use of chemical pesticides has affected bee behavior and physiology. This study aimed to investigate the effects of chronic exposure to four commonly used chemical pesticides (beta‐cypermethrin, chlorbenzuron, chlorothalonil and pendimethalin) on the growth of Apis mellifera ligustica and Apis cerana cerana larvae reared in vitro. RESULTS Pesticide type and concentration were the main factors affecting honeybee fitness. Beta‐cypermethrin and chlorbenzuron had chronic toxic effects on bee larvae. They reduced the fitness of A. m. ligustica and A. c. cerana even at low doses of 323.5 ng g−1 for beta‐cypermethrin and 62.6 ng g−1 for chlorbenzuron in bee bread. The effects were positively associated with the dietary amounts of pesticides. By contrast, chlorothalonil and pendimethalin exposure did not affect bee larvae despite changes in enzyme activities. Caution is still needed with chlorothalonil, which led to a decrease in harvest adult bee numbers at a high dose (6937.2 ng g−1). Furthermore, a difference in pesticide resistance was observed, suggesting that A. m. ligustica may tolerate toxic effects better than A. c. cerana. CONCLUSION This study sheds new light on chronic toxicity in bee larvae exposed to residues in bee bread. The results could guide the scientific and rational use of chemical pesticides to reduce the potential risks to A. m. ligustica and A. c. cerana. © 2021 Society of Chemical Industry.

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“…Finally, (v) we evaluated parameters associated with Ethoflow’s performance. Thus, the proposed software: has a graphical user interface (GUI) and has already been successfully applied in other studies [ 11 , 12 ]; performs animal tracking in homogeneous or heterogeneous environments; can maintain the identity among individuals in animal group tracking; evaluates various kinematic variables (e.g., mean speed, turning angle, and group interaction); supports complex behavior assessment (e.g., mating, grooming, and trophallaxis). …”

Section: Introductionmentioning

confidence: 99%

“…has a graphical user interface (GUI) and has already been successfully applied in other studies [ 11 , 12 ];…”

Section: Introductionmentioning

confidence: 99%

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

Bernardes

Lima

Guedes

et al. 2021

Sensors

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

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A mixture containing the herbicides Mesotrione and Atrazine imposes toxicological risks on workers of Partamona helleri

Cited by 24 publications

References 56 publications

Insecticide selectivity to the predator Podisus nigrispinus (Heteroptera: Pentatomidae) used in eucalyptus culture

Insecticide selectivity to the predator Podisus nigrispinus (Heteroptera: Pentatomidae) used in eucalyptus culture

The effects of beta‐cypermethrin, chlorbenzuron, chlorothalonil, and pendimethalin onApis mellifera ligusticaandApis cerana ceranalarvae rearedin vitro

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

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