Dynamics in the spatial structure of Leptinotarsa decemlineata (Coleoptera: Chrysomelidae)

P. E. Blom, S. J. Fleischer

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Integrating global positioning systems technology with a visual canopy survey, a 1-m level of sampling support was used to explore within-field spatial organization of the Colorado potato beetle, Leptinotarsa decemlineata (Say), in potatoes. Spatially referenced counts of adult and large larvae (third and fourth instar) L. decemlineata were made in four ≅1.5-ha untreated potato fields during two Pennsylvania growing seasons. The presence and nature of spatial structure varied with developmental stage. Overwintered, immigrating adults established 'trends' or 'drift' in the mean density, but spatial dependency (covariance structure) was not detected. This, coupled with a high incidence-to-mean density relationship, suggests a within-field dispersive role for the colonizers. Large larvae and F1 adults, in contrast, displayed spatial dependency (covariance structure), at times accounting for up to ≅45% of the variation. Their relatively lower incidence-to-mean density relationship suggests less within-field mobility during the reproductive phase of the population cycle. These observations imply that, although an insect population's spatial structure may be difficult to characterize due to its dynamic nature, there is a consistent and predictable pattern in L. decemlineata spatial structure that is linked to its population phenology.

Original languageEnglish (US)
Pages (from-to)350-364
Number of pages15
JournalEnvironmental entomology
Volume30
Issue number2
DOIs
StatePublished - 2001

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Insect Science

Fingerprint Dive into the research topics of 'Dynamics in the spatial structure of Leptinotarsa decemlineata (Coleoptera: Chrysomelidae)'. Together they form a unique fingerprint.

Cite this