Flore ("Pteridophyta" et "Spermatophyta") des zones humides du Maroc Méditérranéen: Inventaire et écologie

Despite the interest that one wears increasingly to wetlands through the world, few studies have been devoted to Moroccan wetland flora. After having prospected 45 sites, we have evaluated the specific diversity of wetland flora from 70 floristic inventories. Among 389 recognised species in this study, 175 are wetland species. Rare species or newly quoted have been underlined. On the other hand, the observed plant groupings have been classified according to the physiognomy and the specific composition. A particular attention has been devoted to the discussion of the main ecological factors affecting wetland plant groupings namely : the submersion, the salinity, the domestic organic loading, the local climate and the anthropic perturbations. Thereby, we have ranked dominant species in some ecological groups.Malgré l'intéret qu' on porte de plus en plus aux zones humides á travers le monde, peu d' etudes ont été consacrées á la flore hygrophile marocaine. Aprés avoir prospecté 45 stations, on a évalué la diversité spécifique des hygrophytes du Maroc méditerranéen á partir de 70 relevés floristiques. Sur les 389 espéces reconnues dans cette etude, 175 especes sont caractéristiques des zones humides. Les espéces rares ou nouvellement citées ont été soulignées. D'autre part, les phytocenoses observées ant été classées en fonction de la physionomie et de la composition spécifique. Une attention particuliere a été consacrée á la discussion des principaux facteurs écologiques influant sur les groupements hygrophiles á savoir : la submersion, la salinité, la charge organique domestique, le mésoclimat et les travaux d'aménagement. Ainsi, on a pu regrouper les espéces dominantes en classes écologiques

Insecticidal activity of four medicinal plant extracts against Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)

Methanol extracts from four medicinal plants, Peganum harmala (Zygophyllaceae), Ajuga iva (Labiateae), Aristolochia baetica (Aristolochiaceae) and Raphanus raphanistrum (Brassicaceae) werestudied for their insecticidal effects on the stored grain pest Tribolium castaneum (Herbst). Response varied with plant species. Larvae growth was significantly inhibited when they were fed with extracts incorporated into the diet. Good insecticidal activity against T. castaneum larvae and adults wasachieved with extract of P. harmala seeds, followed by extract of A. iva, Ari. baetica and R. raphanistrum aerial parts. The extracts of the four plants disrupted the developmental cycle of the insect. Extracts of P. harmala, A. iva and Ari. baetica inhibited F1 progeny production. These naturally occurring plant extracts could be useful for managing populations of T. castaneu

Checklist and diversity of wetland flora (Pteridophyta and Spermatophyta) from the Mediterranean Morocco

The Mediterranean wetlands of Morocco are regressing mainly because of draining and pollution, which obviously affect wetland flora. A checklist of wetland Pteridophyta and Spermatophyta of the Mediterranean Morocco was established on base of 129 studied sites. It comprises 141 genera and 232 species corresponding to 70 families. At infraspecific level, 12 subspecies and 2 varieties are recognised. The present paper underlines also site distribution and habitat type of each identified taxon. New records for several natural areas of N Morocco are given.Los humedales meditérraneos de Marruecos están desapareciendo especialmente debido al drenaje y la contaminación, que afectan claramente a la flora hidrófila. Se ha establecido en un inventario de las Pteridophyta y Spermatophyta de los humedales del Marruecos mediterráneo basado en 129 estaciones. Este inventario comprende 141 géneros y 232 especies correspondientes a 70 familias. A nivel infraspecífico, se han reconocido 12 subespecies y 2 variedades. Se indica la distribución y el tipo de hábitat de cada taxón. Se dan varias citas nuevas para diversas regiones naturales del N de Marruecos