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Background:The mallow is a perennial, herbaceous biennial plant of the Malvaceae family occupying an important place in the Algerian flora. Several investigations demonstrated that this plant is very rich in bioactive compounds and possesses a large plethora of therapeutic properties, making it an interesting material deserving to be studied and developed to emphasize its curative power. Within the framework of the conservation and valorization of the consumable plants cultivated in Algeria, we aimed in the present work to investigate Malva sylvestris cultivated in the region of Sidi Bel Abbes (West of Algeria) as a consumable and a medicinal plant and to evaluate its anti-inflammatory activity.Methods: In this context, an ethnobotanical survey was carried out highlighting the popular knowledge regarding the medicinal uses of this plant. In addition, anti-inflammatory activity was assessed in-vivo using carrageenan-induced paw edema test.Results: Our survey demonstrated that the great mallow is used as a consumable plant and as a treatment against: inflammation, anti-cholesterol and anti-diabetes. For the anti-inflammatory activity, the studied extract proved its effective effect, and was able to inhibit the inflammation induced by carrageenan in a significant way (P≤0.05), after two hours of its administration, and at a dose of 550 mg/Kg PC.Conclusion: Malva sylvestris appears to be an interesting plant that could be used judiciously in the treatment of inflammation.

Our work consists in characterizing the phytoplanktonic biodiversity of lake Sidi Mhamed Benali, also, biotic parameters were employed to assess lake trophic conditions, by Multivariate Analysis and by the ecological indices, during the period which extends from March to May 2021.The results of the phytoplankton analysis allowed us to list 89 species divided into 6 classes (Diatoms, Chlorophyceae, Euglenophyceae, Cyanophyceae, Cryptophyceae and Dinophyceae).The general composition of the phytoplankton of the lake is dominated by Diatoms with 34 taxa, or 36.62% of the phytoplankton community, represented mainly by the following genera: Cyclotella, Nitzschia and Fragilaria, followed respectively by Chlorophyceae with 25 taxa, or 31.81% of the total population, they are represented mainly by Oocystis, Tetraspora and Closterium, Eugenophyceae with 13 taxa, a proportion of 12. 82%, the Cryptophyceae: groups 5 taxa, with a proportion of 10.44%, the Cyanophyceae: counts 9 taxa, with a proportion of 6.88%, the Dinophyceae which groups 3 taxa, with a proportion of 1.42%. Moreover, the waters of the lake are classified as waters of average quality and are in as hypereutrophic state.

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This study was accomplished with the intention of developing a new strategy of conflict against the grubs of C pipiens, vectors of parasitical diseases, by bringing a major interest in the use of essential oils of plants as bio-insecticide. The method of job which we adopted, aimed at the valuation of the larvicide activity of the plant material of R officinalis in this species of mosquito collected from the MEKKERA wadi of the city of SIDI BEL ABBES. The results obtained show that the essential oil extracted from R officinalis manifested toxicity towards fourth-stage larvae in Culex pipiens, with a concentration-response relationship. Analysis of the data shows that R. officinalis causes a reduction in several morphometric parameters such as the width of the thorax, the weight and the body volume of the larval stage 4 individuals of C pipiens compared to the controls.