A mathematical approach to simulate spatio-temporal patterns of an insect-pest, the corn rootworm Diabrotica speciosa (Coleoptera: Chrysomelidae) in intercropping systems

Autor(es)

Garcia, Adriano ^[1] ; Consoli, Fernando Luis ^[2] ; Conde Godoy, Wesley Augusto ^[2] ; Ferreira, Claudia Pio ^[1]

Afiliação do(s) autor(es)

^[1] UNESP, IBB, Dept Bioestat, BR-18618000 Botucatu, SP - Brazil

^[2] Univ Sao Paulo, ESALQ, Dept Entomol & Acarol, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: LANDSCAPE ECOLOGY; v. 29, n. 9, p. 1531-1540, NOV 2014.
• Citações Web of Science: 3

Resumo

We report on the use of a spatially explicit model and clustering analysis in order to investigate habitat manipulation as a strategy to regulate natural population densities of the insect-pest Diabrotica speciosa. Habitat manipulation involved four major agricultural plants used as hosts by this herbivore to compose intercropping landscapes. Available biological parameters for D. speciosa on bean, soybean, potato and corn obtained under laboratory conditions were used to group the homogeneous landscapes, composed by each host plant, by a similarity measure of host suitability either for larval survival and development, and adult survival and fecundity. The results pointed corn as the most dissimilar culture. Therefore, intercropping corn with any other crop system tested could reduce insect spread through landscape. This was proved using a cellular automata model which simulate the physiological and behavioural traits of this insect, and also different spatial configurations of the intercropping. Spatio-temporal patterns obtained by simulations demonstrated that the availability of corn bordering the field edge, which are areas more likely to invasion, is key for insect population control. (AU)

• Processo FAPESP: 13/24140-6 - Modelos matemáticos aplicados ao controle de insetos
• Beneficiário: Cláudia Pio Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/00254-0 - Modelagem ecológica aplicada à dinâmica populacional e de interações tróficas em insetos de importância econômica
• Beneficiário: Wesley Augusto Conde Godoy
• Modalidade de apoio: Auxílio à Pesquisa - Regular