Ingestion and effects of cerium oxide nanoparticles on Spodoptera frugiperda (Lepidoptera: Noctuidae)

Author(s)

Castro, Barbara M. M. ^[1] ; Santos-Rasera, Joyce R. ^[2] ; Alves, Dejane S. ^[3] ; Marucci, Rosangela C. ^[1] ; Carvalho, Geraldo A. ^[1] ; Carvalho, Hudson W. P. ^[2]

Affiliation

^[1] Univ Fed Lavras, Dept Entomol, Campus Univ, Caixa Postal 3037, BR-37200900 Lavras, MG - Brazil

^[2] Univ Sao Paulo, Ctr Energia Nucl Agr, Av Centenario 303, BR-13416000 Piracicaba, SP - Brazil

^[3] Univ Tecnol Fed Parana, Campus Santa Helena, BR-85892000 Santa Helena, Parana - Brazil

• Document type: Journal article
• Source: Environmental Pollution; v. 279, JUN 15 2021.
• Web of Science Citations: 0

Abstract

The objective of this study was to evaluate the biological and nutritional characteristics of Spodoptera frugiperda (Lepidoptera: Noctuidae) , an arthropod pest widely distributed in agricultural regions, after exposure to nano-CeO2 via an artificial diet and to investigate the presence of cerium in the body of this insect through X-ray fluorescence mapping. Nano-CeO2 , micro-CeO2 , and Ce(NO3)(3) were incorporated into the diet (0.1, 1, 10, and 100 mg of Ce L-1). Cerium was detected in caterpillars fed with diets con-taining nano-CeO2 (1, 10 and 100 mg of Ce L-1), micro-CeO2 and Ce(NO3)(3) , and in feces of caterpillars from the first generation fed diets with nano-CeO2 at 100 mg of Ce L-1 as well. The results indicate that nano-CeO2 caused negative effects on S. frugiperda. After it was consumed by the caterpillars, the nano-CeO2 reduced up to 4.8% of the pupal weight and 60% of egg viability. Unlike what occurred with micro-CeO2 and Ce(NO3)(3) , nano-CeO2 negatively affected nutritional parameters of this insect, as consumption rate two times higher, increase of up to 80.8% of relative metabolic rate, reduction of up to 42.3% efficiency of conversion of ingested and 47.2% of digested food, and increase of up to 1.7% of metabolic cost and 8.7% of apparent digestibility. Cerium caused 6.8-16.9% pupal weight reduction in second generation specimens, even without the caterpillars having contact with the cerium via artificial diet. The results show the importance of new ecotoxicological studies with nano-CeO2 for S. frugiperda in semi-field and field conditions to confirm the toxicity. (C) 2021 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 15/05942-0 - Shedding light on the metabolism of nanomaterials absorbed by plants with X-ray and vibrational spectroscopy
• Grantee: Hudson Wallace Pereira de Carvalho
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 15/19121-8 - Multi-User Equipment approved in grant 2015/05942-0: micro X-Ray Fluorescence system
• Grantee: Hudson Wallace Pereira de Carvalho
• Support Opportunities: Multi-user Equipment Program