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Master Thesis

Méthodes alternatives de protection en culture de poireau contre la mouche mineuse des Alliacées (Phytomyza gymnostoma) et le thrips de l'oignon (Thrips tabaci)

Abstract : Two main pests attack leek crops in the Nord Pas-de-Calais: Allium leafminer (Phytomyza gymnostoma) and Onion Thrips (Thrips tabaci). Research of alternative methods of protection is necessary in view of the pressure of these insects. Forecasting and monitoring tools of the leaf miner would allow a better management of its control. Knowledge of its life cycle has been enhanced, thanks to several rearings: importance of temperature on its development has been shown. Additional data could help to create a development model. Potential parasitoids have been discovered, their efficiency has to be studied. Detection techniques through olfactory or chromatic attraction were tested, the study must be continued. Nutrition punctures’ observation remains the most effective method to detect the flight. Finally, natural substances were tested in field conditions, but their efficiency has not been demonstrated. Research against thrips revealed four repellent plants on this species in laboratory conditions. Those species must be tested in field conditions. The study on the interest of favourable plants to auxiliary predatories of thrips (banker plants and flower strips) underlined the attractive aspect of these layouts. However, their efficiency on damages reduction was not highlighted within the context of the study. The interest of other species to provide these services needs to be given further study.
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Master Thesis
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Submitted on : Friday, November 27, 2015 - 4:28:56 PM
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Alexandre Schwartz. Méthodes alternatives de protection en culture de poireau contre la mouche mineuse des Alliacées (Phytomyza gymnostoma) et le thrips de l'oignon (Thrips tabaci). Sciences agricoles. 2015. ⟨dumas-01235047⟩

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