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Conduite du pois protéagineux et dégâts de sitones en Seine-et-Marne

Thierry Doré 1 
Abstract : Infestation size ofpea weevil (Sitona lineatus L.) and damages on pea crops have been studied in farmers' plots during a three years program in northern Seine-et-Marne district (French Bassin parisien), with special attention to the effects of sowing dates. Great differences do exist each year between plots and even within a plot, regarding the importance of attacks by adults at emergence of the pea crop. The sowing date has a significant effect on the percentage of plots showing serious attacks: the earliest the crop is sown in a given year, the highest the risk of a serious attack. In case of important attacks by adults at emergence, larvae cause serious damages to nodules during flowering. Therefore nitrogen supply during grain number establishment period is impeded, and final grain yield at harvest may be decreased. A chemical treatmentis not always sufficient to control Sitona as adults are numerous on a plot. Therefore, early sowing periods which are often recommanded in order to enhance total duration of the crop and to avoid water supply problems, could induce problems of another type: costs of treatments, duration of plot inspecting, and risk of not obtaining high yields could increase with early sowing due to attacks by weevils.
Mots-clés : sitone date de semis pois
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Submitted on : Tuesday, August 20, 2019 - 2:58:57 PM
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  • HAL Id : hal-02268173, version 1



Thierry Doré. Conduite du pois protéagineux et dégâts de sitones en Seine-et-Marne. Comptes Rendus de l'Académie d'Agriculture de France, Académie d'agriculture de France, 1991, 77 (8), pp.137-146. ⟨hal-02268173⟩



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