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Master Thesis

Comparaison du niveau d'activité de Thrips tabaci et de ses ennemis naturels entre une parcelle aménagée avec des plantes de service et une parcelle de poireaux traditionnelle

Abstract : Thrips tabaci is one of the most important pests in leek crops. It causes spots on the leaves. This lead to a downgrading of the quality and furthermore causes economic loses for the producer. Nowadays there are no effective pest control systems for T. tabaci. In order to find solutions, an essay has been set up to evaluate the influence of sanitizing plants on the natural pest control. Flower plants and banker plants should attract natural thrips enemies and lead to a high level of them in the field, whereas some aromatic plants should stop thrips to settle down on leek plants. In a parcel furnished with these plants and in a traditionally leek parcel the activity level of T. tabaci and their natural enemies has been evaluated with traditional (method of Berlese, sweep net) and inventing tools (the camera BEEcam and the software AGATHE which the continuous measurement of the insects activity level). In the same way the damages on leafs has been noted in the two parcels. The results have shown that the activity level of natural enemies was higher in the furnished parcel than in the control parcel. In the same way the activity level of T. tabaci and the damages on leafs were more important in the furnished parcel. It appears that some plants (that have not been identified yet) are attractive for both the natural thrips enemies and T. tabaci. Others plants in this system seemed repulsives to the thrips but this has to be confirmed yet. The yields in this system are not sufficient enough for the producer. Nevertheless, with the help of the invented studding methods, supplementary information could be accumulated to understand the behavior of T. tabaci and their natural enemies.
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Master Thesis
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Submitted on : Friday, October 23, 2015 - 3:49:00 PM
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Theresa Koch. Comparaison du niveau d'activité de Thrips tabaci et de ses ennemis naturels entre une parcelle aménagée avec des plantes de service et une parcelle de poireaux traditionnelle. Sciences agricoles. 2015. ⟨dumas-01219950⟩

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