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Master thesis

Évaluation du niveau de régulation biologique des adventices par les Carabidés

Abstract : Integrated pest management crops systems are studied as an alternative to conventional agriculture. They use different solutions to struggle against pests like weeds. Studies have shown that carabids can reduce the weed seedbank but none show if an integrated pest management system can improve the weed seed predation by carabids. This project studied the effects of crop systems on weed and carabid communities and on weed seed predation (total and by invertebrates). Using data from 22 arable fields at the France national scale, distributed in 3 types of crops (winter oilseed rape, cereals and summer crops) and 8 crop systems, we shown that crops had an impact on weed (i) and carabid (ii) communities with higher activity-density of carabids and higher diversity of granivorous in winter oilseed rape, same as an higher predation rate (iii). We also shown that predation by invertebrates was strongly and positively correlated to granivorous activity-density and that there was a region effect as well (v). Nevertheless we did not highlight a crop system impact because of crop and region effects. Thas is why it would be interesting to set up a new experiment with a same distribution of crops and regions in the crop systems.
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Master thesis
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Submitted on : Wednesday, July 11, 2018 - 2:24:57 PM
Last modification on : Saturday, April 30, 2022 - 4:03:12 PM
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  • HAL Id : hal-01835518, version 1



Antoine Lubac. Évaluation du niveau de régulation biologique des adventices par les Carabidés. Sciences de l'environnement. 2014. ⟨hal-01835518⟩



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