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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Predicting evolution of insect resistance to transgenic crops in within-field refuge configurations, based on larval movement

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Autor(es):
Garcia, Adriano G. ; Ferreira, Claudia P. ; Consoli, Fernando L. ; Godoy, Wesley A. C.
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: ECOLOGICAL COMPLEXITY; v. 28, p. 94-103, DEC 2016.
Citações Web of Science: 9
Resumo

The selection pressure imposed by the widespread use of transgenic technologies can lead to the evolution of insect resistance, and the availability of refuge areas that allow susceptible homozygous insects to survive is a key factor in delaying the evolution of resistance in agricultural landscapes. Different strategies to exploit refuge areas exist, but several insect-related ecological traits may directly affect the efficiency of refuges in slowing the development of resistance. Insect larval movement is one such trait that may affect the management of resistance, depending on the refuge strategy adopted. We developed a computational model to simulate how larval movement would affect the spatio-temporal dynamics of the evolution of resistance of insect pests to Bt crops, under different refuge configurations. In order to test the model, we used population data for Spodoptera frugiperda, one of the main target pests for control with Bt toxins. Simulations were run for spatial arrangements composed of three refuge configurations (seed mixture, blocks, and strips), with sizes ranging from 20% to 50% for two types of resistance (incomplete and complete) and three rates of larval movement (proportion of larvae moving per time step), equal to 0, 0.1 and 0.5. We demonstrated that with a seed mixture, in most cases the higher the rate of larval movement, the higher the proportion of resistant insects in the population in an area, regardless of the type of resistance tested. Strip configurations showed the opposite trend. In a block configuration, the number of resistant larvae was highest at an intermediate dispersal rate (0.1). We concluded that larval movement is an important variable affecting the evolution of resistance to Bt crops, but its effect depends on the type of resistance and the configuration and size of the refuge. (C) 2016 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 14/16609-7 - Abordagem multi e interdisciplinar para compreender padrões espaço-temporais de insetos praga e delinear paisagens para manejo sustentável de pragas em sistemas agrícolas tropicais
Beneficiário:Wesley Augusto Conde Godoy
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 15/10640-2 - Abordagem matemática para a dinâmica espaço-temporal de populações de pragas em cultivos Bt e o estabelecimento de refúgio
Beneficiário:Adriano Gomes Garcia
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 16/00831-8 - Predição da distribuição espaço-temporal de populações de Spodoptera frugiperda (Lepidoptera: Noctuidae) em paisagens agrícolas da Flórida (EUA)
Beneficiário:Adriano Gomes Garcia
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado