Reference : Effect of flower traits and hosts on the abundance of parasitoids in perennial multip...
Scientific journals : Article
Life sciences : Entomology & pest control
Life sciences : Agriculture & agronomy
Life sciences : Environmental sciences & ecology
Effect of flower traits and hosts on the abundance of parasitoids in perennial multiple species wildflower strips sown within oilseed rape (Brassica napus) crops
Hatt, Séverin mailto [Université de Liège - ULiège > > R&D Direction : Chercheurs ULiège en mobilité >]
Uyttenbroeck, Roel mailto [Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
Chevalier Mendes Lopes, Thomas mailto [Gembloux Agro‑Bio Tech, University of Liège, Gembloux, Belgium > Department of Agronomy, Biology and Chemistry > Functional and Evolutionary Entomology > >]
Chen, Julian mailto [Chinese Academy of Agricultural Sciences > Institute of Plant Protection > State Key Laboratory for Biology of Plant Diseases and Insect Pests > >]
Piqueray, Julien mailto [Natagriwal Asbl > > > >]
Monty, Arnaud mailto [Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
Francis, Frédéric mailto [Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs >]
Arthropod-Plant Interactions
"Ecology and Control of the Pollen Beetle"
[en] Conservation biological control ; Hymenopteran wasp ; Flower colour ; Ultraviolet reflectance ; Nectar availability ; Redundancy analysis
[en] Reducing the use of insecticides is an important issue for agriculture today. Sowing wildflower strips along field margins or within crops represents a promising tool to support natural enemy populations in agricultural landscapes and, thus, enhance conservation biological control. However, it is important to sow appropriate flower species that attract natural enemies efficiently. The presence of prey and hosts may also guide natural enemies to wildflower strips, potentially preventing them from migrating into adjacent crops. Here, we assessed how seven flower traits, along with the abundance of pollen beetles (Meligethes spp., Coleoptera: Nitidulidae) and true weevils (Ceutorhynchus spp., Coleoptera: Curculionidae), affect the density of parasitoids of these two coleopterans in wildflower strips sown in an oilseed rape field in Gembloux (Belgium). Only flower traits, not host (i.e. pollen beetles and true weevils) abundance, significantly affected the density of parasitoids. Flower colour, ultraviolet reflectance and nectar availability were the main drivers affecting parasitoids. These results demonstrate how parasitoids of oilseed rape pests react to flower cues under field conditions. Similar analyses on the pests and natural enemies of other crops are expected to help to develop perennial flower mixtures able to enhance biological control throughout a rotation system.
TERRA Teaching and Research Centre - TERRA
CARE AgricultureIsLife
Researchers ; Professionals ; Students

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