Effets des phytoconstituants du Nerium oleander (Apocynacées) sur les vers blancs (Rhizotrogini Coleoptera Scrabaeidae)
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The realization of this thesis allowed us to collect information on an ecological study of the devastating species of crops in general and especially of the cereal crops. This is materialized by the determination of two species belonging to the order Coleoptera and the family Scarabaeidae. These are Pseudoapterogyna tusculus Buquet and Pseudoapterogyna dispar Buquet.However, a systematic analysis of the larvae of Rhizotrogini allowed us to establish a recency of the forms of the anal shield (Raster). This will allow agricultural systematicians and technicians to determine the Rhizotrogini species based on the shape of the raster. The use of thin-layer chromatography and mass spectrophotometry enabled us to carry out a phytochemical study in which five flavonoid molecules (Quercitine Kaempherol Luteoline, Apigenin and Quercetin 3OR in Nerium oleander Plant of the family Apocynaceae. The effects of phytocoants of this plant are expressed by the hydrological extract of the Neruim balsam leaves which are toxic to the larvae of Rhizotrogyni (Coleoptéra Scarabaeidae). This toxicity is expressed by the inhibition of the AchE and the variation of the Protein level.