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Master Thesis

Distinction des dommages causés sur les caryopses de céréales par la carbonisation et le charançon du blé (Sitophilus granarius) : expérimentations sur caryopses de seigle (Secale cereale) et de blé tendre (Triticum aestivum) & applications aux assemblages carpologiques

Abstract : Among the different bio-agents responsible for crops degradation, insects undoubtedly figure among the major pests by altering, destroying and contaminating stored products, including grains. For these reasons, the archaeoentomological approach appears to be a relevant tool in the study and interpretation of ancient carpological assemblages. Among pests of grains stocks, the granary weevil Sitophilus granarius (Coleoptera: Curculionidae) is, by far, the commonest species in archaeological context. However, the traces of this insect’s activity (trophic and / or nesting) in ancient carpological corpus remains poorly documented. These traces are even more difficult to recognize on charred grains since some alterations can be mistaken for lesions already present on seeds, especially if no insect remains are preserved. These taphonomical biases make it difficult to interpret archaeological assemblages. Because of the parameters involved (e.g. time, temperature), carbonization may affect the caryopses parasitized by S. granarius differentially; causing different types of impacts (deformation, tunneling, splitting). From carbonization experiments conducted on both healthy and parasitized grains of modern caryopses of rye (Secale cereale) and wheat (Triticum aestivum), criteria to discriminate the impacts of carbonization from those related to grain weevil infestation are presented. Following a taphonomic approach, these experimental results are then compared to archaeological assemblages.
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Master Thesis
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Jérémy Rollin. Distinction des dommages causés sur les caryopses de céréales par la carbonisation et le charançon du blé (Sitophilus granarius) : expérimentations sur caryopses de seigle (Secale cereale) et de blé tendre (Triticum aestivum) & applications aux assemblages carpologiques . Archéologie et Préhistoire. 2016. ⟨dumas-01633516⟩

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