Journal of Pest Science

, Volume 84, Issue 1, pp 133–142

Generational growth rate estimates of Diabrotica virgifera virgifera populations (Coleoptera: Chrysomelidae)

  • Márk Szalai
  • Judit Papp Komáromi
  • Renata Bažok
  • Jasminka Igrc Barčić
  • József Kiss
  • Stefan Toepfer
Original Paper

DOI: 10.1007/s10340-010-0336-z

Cite this article as:
Szalai, M., Papp Komáromi, J., Bažok, R. et al. J Pest Sci (2011) 84: 133. doi:10.1007/s10340-010-0336-z

Abstract

Modelling population dynamics of the maize pest Diabrotica virgifera virgifera LeConte (western corn rootworm; Coleoptera: Chrysomelidae) requires knowledge on the growth rate (=net reproductive rate) of the species. We investigated the generational (=annual) growth rate of D. v. virgifera in isolated maize fields in southern Hungary and eastern Croatia over several years. The population densities of D. v. virgifera were assessed by absolute counts of emerging adults in 90 gauze cages per study field. Emergence ranged from 1.3 to 30.7 adults per m2 in continuous maize field sections, and from 0.3 to 5.1 adults per m2 in adjacent first-year maize sections. The annual growth rates of D. v. virgifera ranged from 0.5 to 13, and averaged in close to 4. These experimentally assessed growth rates could complement growth estimates in population dynamic models, particularly those for forecasting the population growth to economic thresholds or for estimating population build-ups after new introductions of this alien species in Europe. As an example, the determined growth rate was used to estimate that the first documented successful introduction of this species into Europe occurred between 1979 and 1984, which is 8–13 years before the detection of this species and its larval damage in maize fields near Belgrade, Serbia, in 1992.

Keywords

Western corn rootwormNet reproductive rateEmergence cagesInvasionPopulation dynamicsZea mays

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Márk Szalai
    • 1
  • Judit Papp Komáromi
    • 1
  • Renata Bažok
    • 2
  • Jasminka Igrc Barčić
    • 3
  • József Kiss
    • 1
  • Stefan Toepfer
    • 1
    • 4
  1. 1.Szent István University, Plant Protection InstituteGödöllőHungary
  2. 2.Department of Agricultural ZoologyUniversity of ZagrebZagrebCroatia
  3. 3.Chromos-agro CompanyZagrebCroatia
  4. 4.CABI Europe-Switzerland, c/o Plant Protection and Soil Conservation DirectorateHódmezővásárhelyHungary