Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control
In: ISSN: 0021-8901, 2019
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International audience ; 1. Conservation biological control aims to control pests by promoting wild populations of natural enemies. One challenge is to attract and retain efficient natural enemies in crop fields, which often are a suboptimal environment. Towards this goal, the attract-and-reward strategy relies on combining attractive synthetically produced herbivore-induced plant volatiles (HIPVs) with companion plants (non-crop plants which provide alternative resources to the targeted natural enemies). Although severely overlooked, the spatial arrangement of HIPV dispensers and rewards inside crop fields may strongly influence the foraging behaviour and persistence of natural enemies and thus the success of this pest management strategy.2. We tested the impact of two contrasting spatial arrangements of HIPV dispensers and rewards, alternatively inside and around a block of target apple trees, on the efficacy of the biological control of Aphis citricola populations by the common predatory ladybird Propylea japonica in apple orchards in northern China. We used synthetic methyl salicylate (MeSA) as an attractant and the companion plant Calendula officinalis as a reward. To better understand how the spatial arrangement of MeSA dispensers and companion plants affected the attraction and foraging behaviour of adult ladybirds, we conducted indoor experiments in a flight mill, an olfactometer and a wind-tunnel.3. Blocks of target trees treated with MeSA dispensers inside and companion plants around provided the most efficient pest control in orchards, compared with the opposite spatial arrangement.4. The synthetic MeSA dispenser and the companion plant synergistically attracted ladybirds in the olfactometer and enhanced their flight activity in the flight mill. In the wind-tunnel, MeSA served as a spatial cue for ladybirds to find nearby prey, while companion plants were sought in the absence of prey.5. Synthesis and applications. The present study will help further improvements of aphid control in apple orchards ...
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Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control
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Autor/in / Beteiligte Person: | Jaworski, Coline, C ; Xiao, Da ; Xu, Qingxuan ; Ramirez-Romero, Ricardo ; Guo, Xiaojun ; Wang, Su ; Desneux, Nicolas ; Evolution et Diversité Biologique (EDB) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) ; Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) ; Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement IRD : UMR237-Centre National de la Recherche Scientifique (CNRS) ; Institute of Plant and Environment Protection ; Beijing Academy of Agriculture and Forestry Sciences ; Universidad de Guadalajara ; Institut Sophia Agrobiotech (ISA) ; Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Centre National de la Recherche Scientifique (CNRS) ; Beijing Key Laboratory of Environment-Friendly Management on Fruit Disease and Pests in North China BZ0432 ; International Joint Research Program of BAAFS GJHZ2016 ; Youth Scientific Research Funds of Beijing Academy of Agricultural and Forestry Sciences QNJJ201725 ; National Key Research and Development Program of China 2017YFD0201000 ; Beijing Science and Technology Program D171100001617003 |
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Zeitschrift: | ISSN: 0021-8901, 2019 |
Veröffentlichung: | HAL CCSD ; Wiley, 2019 |
Medientyp: | academicJournal |
DOI: | 10.1111/1365-2664.13353 |
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