Trends towards Lower Susceptibility of Spodoptera frugiperda (Lepidoptera: Noctuidae) to Teflubenzuron in Brazil: An Evidence for Field-Evolved Resistance

Autor(es)

Amaral, Fernando Semmelroth de Assuncao e ; Kanno, Rubens Hideo ; Nascimento, Antonio Rogerio Bezerra do ; Guidolin, Aline Sartori ; Omoto, Celso

• Tipo de documento: Artigo Científico
• Fonte: INSECTS; v. 14, n. 2, p. 11-pg., 2023-02-01.

Resumo

Simple Summary The fall armyworm (FAW), Spodoptera frugiperda (J.E Smith), is an important insect pest that can cause severe damage to a wide range of economically important crops. Many insecticides are used to manage the FAW in Brazil, including teflubenzuron. Here, we monitored the susceptibility of the FAW to teflubenzuron in more than 200 field-collected populations from major corn-growing regions of Brazil, from 2004 to 2020. Overall, our findings showed that the FAWs susceptibility to this insecticide reduced over the years, providing evidence of field-evolved resistance. We discuss the possible causes for this loss in the susceptibility to teflubenzuron in S. frugiperda and focus on the importance of implementing resistance management strategies. Susceptibility monitoring to insecticides is a key component to implementing insecticide resistance management (IRM) programs. In this research, the susceptibility to teflubenzuron in Spodoptera frugiperda (J.E Smith) was monitored in more than 200 field-collected populations from major corn-growing regions of Brazil, from 2004 to 2020. Initially, we defined a diagnostic concentration of 10 mu g mL(-1) of teflubenzuron using a diet-overlay bioassay for monitoring the susceptibility. A variation in the susceptibility to teflubenzuron in S. frugiperda was detected among populations from different locations. We also detected a significant reduction in the susceptibility to teflubenzuron throughout time in all the populations of S. frugiperda evaluated, with larval survival at diagnostic concentration varying from values of <5% in 2004 to up 80% in 2020. Thus, this research provides evidence of field-evolved resistance of S. frugiperda to teflubenzuron and reinforces that IRM practices are urgently needed to be implemented in Brazil. (AU)

• Processo FAPESP: 14/26212-7 - Exploração de técnicas de sequenciamento de nova geração (SNG) para a identificação de marcadores moleculares para o monitoramento da resistência de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) a inseticidas e proteínas Bt
• Beneficiário: Antonio Rogério Bezerra do Nascimento
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/09159-0 - Mapa genético e QTLs associados a resistência de Spodoptera frugiperda (J. e. Smith) a inseticidas e toxinas Bt
• Beneficiário: Antonio Rogério Bezerra do Nascimento
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 19/06217-8 - Impacto da paisagem agrícola para manejo da resistência de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) a inseticidas espinosinas
• Beneficiário: Rubens Hideo Kanno
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/17215-6 - Identificação de marcadores moleculares para a detecção de resistência a inseticidas em Spodoptera frugiperda e Euschistus heros e o papel da microbioma do inseto na resistência
• Beneficiário: Antonio Rogério Bezerra do Nascimento
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado