Distribution of black fungus gnats (Diptera, Sciaridae) in Morocco, with an updated list of species and an emphasis on Moroccan crop pest species

The present work deals with the spatial distribution of the sciarid species (black fungus gnats) recorded from Morocco throughout the major biogeographical regions: Rif, Eastern Morocco, Atlantic Plain, Middle Atlas, High Atlas, and Anti-Atlas, providing for the first time an atlas of the distribution of Moroccan sciarid fauna. The analysis of the species distribution showed differences between the regions, revealing that the High Atlas and the Rif hosted the greatest specific richness. Of the surveyed sites, forests, crop fields, and aquatic habitats seem to be the most favourable for supporting many sciarid species. Ecological preferences for each species are discussed, indicating a clear preference for medium altitudes ranging from 500 to 1000 m. Alongside the study on the distribution of species, a review of the species recorded in Morocco and gathered from the literature has enabled us to update the checklist of sciarid species, which comprises 65 so far in Morocco. Particular emphasis focused on black fungus gnats considered potentially harmful, with the aim of assessing their distribution in the country, has revealed that Bradysia transitata, B. trivittata, B. xenoreflexa, Lycoriella sativae, Scatopsciara subarmata were collected from strawberry greenhouses (Rosaceae: strawberries), Bradysia placida, B. santorina, B. scabricornis, B. tilicola, B. trivittata and Camptochaeta jeskei were collected from fruit trees (Rosaceae: almond trees), Bradysia santorina, Corynoptera saccata and C. semipedestris were found on palms (Arecaceae: date palms), Scatopsciara atomaria and S. curvilinea were captured in crop fields (Poaceae, Fabaceae), Bradysia scabricornis, Bradysiopsis vittata were collected from Liliaceae, Scatopsciara atomaria was also found on Asteraceae and Solanaceae, and Corynoptera praeparvula was exclusively reported from Solanaceae

Influence of strain/stress on the nonlinear-optical properties of sprayed deposited ZnO:Al thin films

International audienc

Caractérisation physico-chimique des argiles fibreuses de « Souk el Arbaa » du Gharb, Maroc

Le présent travail s’intéresse à l’étude de la qualité industrielle des argiles fibreuses de ‘Souk El Arbaa’ du Gharb appartenant à l’étage géologique Eocène-Miocène. Cette étude a révélé à travers l’analyse d’une vingtaine d’échantillons, prélevés sur des niveaux marneux variés, par spectrométrie à fluorescence X une carence en fer, une richesse en CaO, des taux plus ou moins élevés en Al2O3. La diffractométrie aux rayons X a permis de mettre en évidence une composition minéralogique assez variée dans les différents échantillons analysées, dominée par la présence de paragenèses minéralogiques composées de calcite, dolomite, quartz, sépiolite et attapulgite (argiles fibreuses). Ainsi, le chimisme des échantillons analysés indique d’une façon inéluctable que les argiles de ‘Souk El Arbaa’ du Gharb nécessitent un traitement afin de les rendre exploitables pour la production de céramique d’excellente qualité.Mots-clés : qualité industrielle, argiles fibreuses, Eocène-Miocène, céramique, Maroc

Nonlinear optical studies of Oligomers dyades of polyphenylene using Open aperture z-scan technique

National audienc

Nonlinear optical studies of Oligomers Anisole dyades by Open-aperture z-scan technique

International audienc

Comparative pathogenicity of Colletotrichum spp. against different varieties of strawberry plants (Fragaria ananassa) widely grown in Morocco

The evolution of anthracnose symptoms on the aerial part (leaves, stems and strawberries) of three varieties Fortuna, Camarosa and Festival of strawberry plants inoculated with the conidial suspensions of Colletotrichum acutatum and Colletotrichum gloeosporioides isolates was followed. The severity index and infection coefficients increased in function of time. Seven days after inoculation they were low not exceeding 13.43% and 43.33, but they increased four weeks after inoculation, respectively, to 37.96% and 99 on strawberry plants of the Camarosa variety, 54.44% and 105 on those of Fortuna and 51.12% and 85 on those of Festival. At the sixth week, the severity index and infection coefficients became very high, reaching respectively 100% and 408 on Fortuna plants inoculated with C. gloeosporioides isolate (Coll3) followed by Coll2 (89.28% – 300), Coll1 (86.66% – 378) and Coll4 (80.45% – 198) of C. acutatum species. Similarly, the isolate Coll3 caused fruit rot; the percentage of rotten strawberries was 100% on Fortuna variety, 83.33% on Festival and 70.25% on Camarosa. A positive re-isolation of the tested Colletotrichum isolates has been noted from leaves of strawberry varieties and negative from crowns or the roots. A significant to moderate reduction in fresh and dry weights of the aerial part and roots was noted in inoculated strawberry plants compared to the control

The Investigation of third-order hyperpolarizabilities and susceptibilities of push-pull azobenzene polymers

International audienc

Third order nonlinear optical response of self-assembled molecular corners

International audienc

Effect of poling in Polymers Containing Azobenzene Push–Pull Chromophores on nonlinear optic of second and third order

International audienc