La lutte biologique contre les tétranyques dans les framboisières sous tunnels : introduction d’acariens phytoséiides et modèle de simulation dynamique

Authors: Lemaire, Émilie
Advisor: Fournier, ValérieRoy, Michèle
Abstract: The main objective of this project was to evaluate the effectiveness of releases of phytoseiid predatory mites (Neoseiulus fallacis, N. californicus and Phytoseiulus persimilis) to suppress spider mites in high tunnel raspberries. Results suggested that phytoseiid releases are a realistic way to control spider mites and to reduce the use of acaricide in this new production system without compromising the quality of the crop. However, temperature and humidity conditions must be suitable to achieve successful establishment of predators and release rates must be sufficiently high to promote acceptable pest control. The second objective was to model the evolution of mite populations to better understand the dynamics observed under tunnels. The model developed describes the spider mite outbreak and abundance over time with a good fit. It shows that higher temperature under tunnel is a critical parameter governing predation and spider mite population increase.
Document Type: Mémoire de maîtrise
Issue Date: 2012
Open Access Date: 18 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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