Harmonia axyridis: a threat to Brazilian Coccinellidae?

Revista Brasileira de Entomologia

Camila B. C. Martins²  Lúcia M. Almeida¹  Regina C. Zonta-de-carvalho¹  Camila F. Castro²  Rosylaine A. Pereira² 

[1] ,Universidade Federal do Paraná Departamento de Zoologia Laboratório de Sistemática e Bioecologia de ColeopteraCuritiba,Brazil

关键词: Aphididae;    intraguild predation;    invasive species;    native species;    Aphididae;    espécie invasora;    espécie nativa;    predação intraguilda;   

DOI  :  10.1590/S0085-56262009000400018

来源: SciELO

【 摘 要 】

Harmonia axyridis (Pallas) (Coleoptera, Coccinellidae) is a polyphagous Asian species, well-known as a classical biological control agent of aphids around the world, introduced probably accidentally in Brazil, sampled for the first time in 2002. It is an important intraguild predator, competing for food with native coccinellids. It was studied H. axyridis alimentary sources and host plants, its abundance compared with native and established species, the influence of abiotic factors and the seasons over the abundance of H. axyridis throughout one year, and discussed the mechanisms which influence the displacement of species. Harmonia axyridis was found in 38 plant species, among them 20 were new records, feeding on 20 aphid species, eight of them new alimentary records. Between 2006/2007, eight Coccinellidae species were collected and H. axyridis was the most abundant (91.23%). Harmonia axyridis peak of abundance occurred in August and September 2007, probably influenced by the temperature and food availability. From 1999 to 2007 a reduction and variation in the diversity of collected species of Coccinellidae were observed with the predominance of H. axyridis, which may indicate their displacement.

【 授权许可】

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