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Effect of flower traits and hosts on the abundance of parasitoids in perennial multiple species wildflower strips sown within oilseed rape (Brassica napus) crops

文献类型： 外文期刊

作者： Hatt, Severin 2 ; Uyttenbroeck, Roel 1 ; Lopes, Thomas 2 ; Chen, Ju Lian 1 ; Piqueray, Julien 5 ; Monty, Arnaud 4 ; Fr 1 ;

作者机构： 1.Univ Liege, Gembloux AgroBio Tech, TERRA AgricultureIsLife, Passage Deportes 2, B-5030 Gembloux, Belgium

2.Univ Liege, Gembloux AgroBio Tech, Dept Agron Biol & Chem, Funct & Evolutionary Entomol, Passage Deportes 2, B-5030 Gembloux, Belgium

3.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, 2 West Yuanmingyuan Rd, Beijing 100193, Peoples R China

4.Univ Liege, Gembloux AgroBio Tech, Dept Biosyst Engn, Biodivers & Landscapes, Passage Deportes 2, B-5030 Gembloux, Belgium

5.Natagriwal Asbl

关键词： Conservation biological control; Hymenopteran wasp; Flower colour; Ultraviolet reflectance; Nectar availability; Redundancy analysis

期刊名称：ARTHROPOD-PLANT INTERACTIONS （ 影响因子：1.988； 五年影响因子：2.059 ）

ISSN： 1872-8855

年卷期： 2018 年 12 卷 6 期

页码：

收录情况： SCI

摘要： 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.

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