Phytoprotection (2003) 84, 121-128
Jacques Mignon, Pierre Colignon, Éric Haubruge and Frédéric Francis (2003)
Effet des bordures de champs sur les populations de chrysopes [Neuroptera : Chrysopidae] en cultures maraîchères
[Impact of field borders on lacewing populations [Neuroptera: Chrysopidae] in vegetable open fields]
Phytoprotection 84 (2), 121-128
Abstract: Both diversity and density of lacewings depend on prey availability but also on plant composition near crops. The impact of field borders vegetation on abundance and diversity of Syrphidae and Coccinellidae is well known but very few studies have been realised to assess its effect on the abundance and diversity of Chrysopidae. In 2000 and 2001, the impact of adjacent habitats on lacewing populations was investigated in both carrot and broad bean open fields. Three types of field borders were selected: (1) set-asides mainly composed by Lolium perenne and Trifolium spp., (2) crops (wheat, beet or other vegetables) and (3) woody areas (mixture of Acer sp., Populus sp. and Salix sp.). Insects were caught using yellow pan traps. Chrysopidae populations were shown to be significantly lower in carrot and broad bean fields bordered with woodland. Lacewing and other Neuroptera species richness were always low and were discussed in relation with their role of pest predators associated with other aphidophagous insects.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: French)
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Database assignments for author(s): Frédéric Francis
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
