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Fatma Bousmaha

  • Biodiversity Journal, 11 (4): 1031-1036

    Labdelli Fatiha, Bousmaha Fatma, Adamou Djerbaoui Malika, Bouchenafa Nadia, Oulbachir Karima & Laouidj Aicha
    Impact of Nematode Heterodera avenae Wollenwebwer, 1924 (Heteroderidae) attack on cereal yields in the region of Tiaret (Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2020.11.4.1031.1036

    ABSTRACT
    The cyst nematode Heterodera avenae Wollenweber, 1924 (Heteroderidae) is an obligate endoparasite of grasses. It is the most studied and most damaging nematode known for more than a century. The study of the distribution of the H. avenae cyst nematode was carried out on some plots of cereal-oriented municipalities in the Tiaret region to assess the infestation levels of the plots in order to study the impact of the nematode infestation on cereal yields. Spearman’s test was used, which allowed us to study the correlation between the degree of infestation and cereal yields, particularly wheat, barley and oats. The plots of the communes surveyed are all infested by H. avenae with different levels of infestation except the plots of the town of Sebaine and Mahdia where the infestation is practically non-existent (0 cysts/100 g of soil). The correlation is negative between the degree of infestation and the yield (r = -0.06), the yields of hard wheat are low when the degree of infestation is high. Soft wheat and barley yields are negatively correlated with respectively, r = - 0.26 and r = -0.27, therefore, heavy infestations of the nematode lead to a decrease in yield. Unlike other cereal species, the correlation is positive with the degree of infestation (r = 0.18), so the infestation of the nematode did not greatly influence oat yields. Oats are a tolerant species for nematode attack in relation to wheat and barley that have recorded decreases in yields. Unlike the three previous crop types, oats stand out for their tolerance to this parasite.

  • Biodiversity Journal, 10 (2): 141-146

    Fatma Bousmaha, Malika Adamou-Djerbaoui, Fatiha Labdelli, Mohamed Essalah Azzaoui, Fatima Beldjillali, Khadidja Raci, Khadidja Titaf & Walid Dahmani
    Inventory of scorpion fauna (Arachnida Scorpiones) in Tiaret region (Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2019.10.2.141.146

    ABSTRACT
    The present work was carried out in the region of Tiaret to study the diversity of scorpions in western Algeria. In this locality, three stations were chosen: the first one is a rocky area, the second one is represented by a scrub and the third is an anthropized zone. The scorpions sampling was done, during the year 2017, randomly and it was carried out by searching the scorpions in their hiding places, where a total of 200 individuals were sampled. The specimens morphometry, based on the measurement of 8 parameters, made it possible to diagnose two families: Buthidae represented by two species Buthus occitanus (Amoreux, 1789) (88.5%) and Buthacus arenicola (Simon, 1885) (7%) and Scorpionidae represented by Scorpio maurus Linnaeus, 1758 (4.5%). Among the measures that make the difference between these species, we mention the width of the chela, which is of the order of 3.03 ± 0.67 for Buthus occitanus and 2.27 ± 0.49 mm for Buthacus arenicola, while Scorpio maurus has larger chela.