Region: South America > Brazil
Categorized: Environmentally safe pesticides and pesticide risk management
Tagged: host strains insecticide resistance population genetics
Population genetic structure and demographic history of Spodoptera frugiperda (Lepidoptera: Noctuidae): implications for insect resistance management programs
Spodoptera frugiperda is a destructive pest that often imposes difficult management due to its high polyphagy and rapid insecticide resistance evolution. Knowledge of species diversification, population structure, and host preference can aid efforts to manage pest populations. In this study, we investigated the patterns of hybridization, genetic structure, and gene flow in S. frugiperda populations, discussing how we can apply this knowledge to insect resistance management programs in South America.
We conclude that high levels of population admixture, including between corn‐ and rice‐strains, were found in sampled populations. We showed that S. frugiperda immigrants will not necessarily cause an increase in LC50 upon arrival in a new location but will assure the constant presence of resistance alleles in the area. Increases in LC50 largely depend on the local pesticide management adopted in the areas. Our results indicate that pesticide resistance management must be adopted on a local or small regional scale
Hi Aline, I’m wondering what the implications of your research might be for pesticide resistance management in Africa and Asia?
Hi Roger, FAW is a problem in Brazil for a while now. Thus, we have a solid amount of research on its biological, behavior, resistance management, population genetics, and other topics. As Africa and Asia, Brazil is a vast country with different ecoregions, and it’s in this context this specific work can help. FAW studies in Brazil can work as a model to be considered when studying and debating FAW management strategies in Africa and Asia. In this paper, we show that we need to think of FAW resistance management in terms of the ecoregion and population dynamics, not the… Read more »