Article (Scientific journals)
A push–pull strategy to control aphids combines intercropping with semiochemical releases
Xu, Qingxuan; Hatt, Séverin; Chevalier Mendes Lopes, Thomas et al.
2018In Journal of Pest Science, 91, p. 93-103
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Keywords :
Triticum aestivum; Pisum sativum; Association; Methyl salicylate; E-b-farnesene; Alginate beads; Integrated pest management
Abstract :
[en] Even if insect pest populations can be reduced by increasing plant diversity through intercropping, natural enemies are not always favored in such systems. Alternatively, semiochemical substances have been tested to enhance biological control, with inconsistent results. Combining both strategies can be an interesting way to maximize pest control. In this work, a 2-year setup involving wheat–pea strip intercropping combined with the release of E-b-farnesene (EBF) or methyl salicylate (MeSA) was tested as a push–pull strategy to simultaneously repel aphids and attract beneficials. Two types of slow-release formulation (i.e., oil and alginate beads) containing EBF or MeSA were deployed with the intercropping. The abundance of aphids was significantly decreased, while hoverfly larvae and mummified aphids increased on both pea plants and wheat tillers by the release of oil-formulated EBF and MeSA. The proportion parasitism of the aphid-parasitism rate [mummies/(aphids + mummies)] was also increased by treating both crops in both years. Releasing EBF through oil rather than alginate beads proved significantly better for attracting natural enemies and reducing aphids. Aphids were negatively correlated with the density of hoverflies (both adults and larvae) and numbers of mummies. All these results showed that combining intercropping with the release of EBF or MeSA formulated in oil can significantly reduce aphid density and attract their natural enemies. Therefore, the combination of both strategies could help farmers reduce the use of insecticides.
Research center :
TERRA Teaching and Research Centre - TERRA
Disciplines :
Environmental sciences & ecology
Entomology & pest control
Agriculture & agronomy
Author, co-author :
Xu, Qingxuan ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol. (Paysage)
Hatt, Séverin ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs
Chevalier Mendes Lopes, Thomas ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.
Zhang, Yong ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol. (Paysage)
Bodson, Bernard ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions végétales et valorisation
Chen, Julian;  Chinese Academy of Agricultural Science > Institute of Plant Protection
Francis, Frédéric  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs
Language :
English
Title :
A push–pull strategy to control aphids combines intercropping with semiochemical releases
Publication date :
2018
Journal title :
Journal of Pest Science
ISSN :
1612-4758
eISSN :
1612-4766
Publisher :
Springer
Volume :
91
Pages :
93-103
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
CARE Agriculture Is Life (University of Liège)
National Key R & D Plan in China (2016YFD0300701)
Cooperation Project between Belgium and China from MOST (2014DF32270)
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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