Évaluer l’intensité de l’utilisation des pesticides dans les colzas d’hiver : cas de la zone d’étude de Fénay

Abstract : We studied pesticide use data (herbicides, insecticides, fungicides and growth regulators) from surveys conducted annually on a small agricultural area located in Côte d'Or. Data on 117 plots belonging to 7 farmers and grown in winter oilseed rape were analyzed for the period 2004–2011. The index used to characterize the use of different groups of pesticides is IFT (Treatment Frequency Index). Overall, the average total IFT is 6.3 with a range of variation between 2.1 and 12.5. It increased between 2004 and 2011, but it remains highly variable during the year and at the same farmer. For a majority of fields, three groups of pesticides were used (61% of fields) but there are also fields (25%) who received only two groups of pesticides (herbicides and insecticides). The use intensity of a group of pesticides is independent of the use intensity of other groups and the number of groups of pesticides. All plots are at least one herbicide (IFT H average = 1.76) but it is the insecticides that are commonly used with IFT I average of 3.79. They contribute on average more than 55% of the total IFT while the IFT herbicides contribute to 30%.
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Submitted on : Friday, April 27, 2018 - 2:52:49 PM
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Fabrice Dessaint, Luc Biju-Duval, Marc Buthiot, Jean-Philippe Guillemin. Évaluer l’intensité de l’utilisation des pesticides dans les colzas d’hiver : cas de la zone d’étude de Fénay. OCL Oilseeds and fats crops and lipids, EDP, 2014, 21 (1), ⟨10.1051/ocl/2013033⟩. ⟨hal-01780405⟩

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