Competitive interactions between an exotic and a native ladybeetle: A field cage study

Marlijn Hoogendoorn, George E Heimpel

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We conducted field-cage studies on the direct interactions between a coccinellid species native to North America, Coleomegilla maculata De Geer, and a species introduced from Asia, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae). We compared the mortality and weight gain of larvae of both species in field cages that enclosed one or both species with corn plants containing high or low aphid numbers. We did not find a significant effect of the presence of H. axyridis on the survival or weight gain of C. maculata, but H. axyridis larvae weighed more when kept with C. maculata for 5 days than when kept with equal numbers of conspecifics. This suggests that intraspecific competition was stronger for H. axyridis than the interspecific competition with C. maculata. The spatial distribution of C. maculata over the plants differed between single-species and two-species treatments in a manner that suggested that this species avoided interactions with H. axyridis.

Original languageEnglish (US)
Pages (from-to)19-28
Number of pages10
JournalEntomologia Experimentalis et Applicata
Volume111
Issue number1
DOIs
StatePublished - Apr 1 2004

Fingerprint

Coleomegilla maculata
Harmonia axyridis
cages
weight gain
larva
larvae
intraspecific competition
interspecific competition
Coccinellidae
aphid
introduced species
native species
Aphidoidea
indigenous species
Zea mays
maize
spatial distribution
Coleoptera
mortality

Keywords

  • Aphids
  • Coccinellidae
  • Coleomegilla maculata
  • Coleoptera
  • Competition
  • Harmonia axyridis
  • Invasion

Cite this

Competitive interactions between an exotic and a native ladybeetle : A field cage study. / Hoogendoorn, Marlijn; Heimpel, George E.

In: Entomologia Experimentalis et Applicata, Vol. 111, No. 1, 01.04.2004, p. 19-28.

Research output: Contribution to journalArticle

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