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

Autori
Szalai, Mark ; Papp Komáromi, Judit ; Bažok, Renata ; Igrc Barčić, Jasminka ; Kiss, Jozsef ; Toepfer, Stephan

Izvornik
Journal of pest science (1612-4758) 84 (2011), 1; 133-142

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Western corn rootworm; net reproductive rate; emergence cages; invasion; population dynamics;
(Western Corn Rootworm; net reproductive rate; emergence cages; invasion; population dynamics; Zea mays)

Sažetak
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 this species and its larval damage in maize fields near Belgrade, Serbia, in 1992.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA