Spatial distribution of Cydia fagiglandana (Zeller) in an exploited holm oak (Quercus ilex L.) forest

  • A. Jimenez-Pino Laboratorio de Entomología Aplicada. Departamento de Fisiología y Zoología. Facultad de Biología. Universidad de Sevilla. Avda. Reina Mercedes, 6. 41012 Sevilla. Spain
  • L. Maistrello Dipartimento di Scienze Agrarie e degli Alimenti. Università di Modena e Reggio Emilia. Reggio Emilia. Italy
  • M. A. Lopez-Martinez Laboratorio de Entomología Aplicada. Departamento de Fisiología y Zoología. Facultad de Biología.Universidad de Sevilla. Avda. Reina Mercedes, 6. 41012 Sevilla. Spain
  • M. E. Ocete-Rubio Laboratorio de Entomología Aplicada. Departamento de Fisiología y Zoología. Facultad de Biología.Universidad de Sevilla. Avda. Reina Mercedes, 6. 41012 Sevilla. Spain
  • F. J. Soria-Iglesias Laboratorio de Entomología Aplicada. Departamento de Fisiología y Zoología. Facultad de Biología.Universidad de Sevilla. Avda. Reina Mercedes, 6. 41012 Sevilla. Spain
Keywords: carpophagous pests, dispersion rates, population density maps, Tortricidae

Abstract

Cydia fagiglandana (Zeller) (Lepidoptera: Tortricidae) is a carpophagous insect which affects the quality and viability of the fruits of beech, oak and chestnut trees. The majority of the works on this species in holm oak woods dealt with assessing its damages. No investigations have yet been performed on the spatial distribution of this pest, although this element is one of the key features to take in account in order to develop proper integrated management programs. The present study, performed during a four years period in an exploited holm oak forest area in Southern Spain, investigated the spatial distribution of C. fagiglandana integrating classic methods based on dispersion rates and distribution fitting together with the elaboration of population density maps based on GIS. Our results showed that the infestation rate progressively decreased from 0.339 in 2001 to 0.102 in 2004. Density maps for C. fagiglandana also show an heterogeneous and aggregated distribution of this insect and a spatio-temporal stability in this area. It is concluded that during the four years of the study inter-specific competition with the weevil Curculio elephas was the factor that most affected the spatial distribution of C. fagiglandana in the experimental plot.

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How to Cite
Jimenez-Pino, A., Maistrello, L., Lopez-Martinez, M. A., Ocete-Rubio, M. E., & Soria-Iglesias, F. J. (1). Spatial distribution of Cydia fagiglandana (Zeller) in an exploited holm oak (Quercus ilex L.) forest. Spanish Journal of Agricultural Research, 9(2), 570-579. https://doi.org/10.5424/sjar/20110902-050-10
Section
Plant protection