https://dspace.univ-ouargla.dz/jspui/handle/123456789/27422 2026-04-09T09:59:08Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27447 Titre: STUDY OF THE BIOECOLOGY OF Tuta absoluta MEYRICK (LEPIDOPTERA, GELECHIIDAE) IN THE REGION OF OUARGLA (SEPTENTRIONAL SAHARA, ALGERIA) Auteur(s): CHENNOUF Rekia; SAGGOU Hayat; GUEZOUL Omar; BRAHMI Karima; DOUMANDJI-MITICHE Bahia Résumé: The study of pests of the bio destructive Tuta absoluta (Meyrick) under greenhouse tomato in the region of Hassi Ben Abdallah (31 ° 59 'N, 5 ° 26' E.) in Ouargla by pheromone traps showed that the global dynamics of populations T. absoluta 5 shows the difference in successive generations of six months is the growth cycle of tomato. There were a maximum of 765 individuals, 912 and 245 respectively in the three greenhouses studied in I .T.D.A.S. The life cycle of T. absoluta in tomato plants (T: 34 ° C H%: 50 - 60%) lasts 23.85 days: egg (6 d), L1 (3.25 d), L2 (2.7 d), L3 (2.15 d), L4 (1d) and 8.75 days the chrysalis. This pest has caused losses of up to 100% in leaves and fruits of two varieties of tomato Zahra and Nedjma in February. The infestation in Nedjma is more important than Zahra. Description: Revue des BioRessources 2021-06-30T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27445 Titre: INGENIOUS SYSTEMS THREATENED WITH EXTINCTION; CASE OF THE GHOUT SYSTEM Auteur(s): BOUMADDA Abdelbasset; DADAMOUSSA Med Lakhdar; BELAROUSSI Med El Hafed; IDDER IGHILI Hakima Résumé: The life of the Oasis remains singular in more ways than one. To survive in a hostile environment, oases have developed ingenious techniques, adapted to local conditions, but also social forms closely aligned with the former. For millennia, the management of clean water in each Oasis has managed to maintain a balance between scarce water resources and growing food needs. The intrusion of the modern world into the Oasis by means of technological means, by motorization and industrialization has caused major upheavals. The ‘Ghout’, this agrarian crater remains in place until today and embodies a sustainability where the local producer is characterized by his wisdom and his perfect knowledge of the environment in which he lives. The local peasants, unable to bring water to them, decided to go to it via this ingenious system. In recent decades, and unlike some Saharan regions that suffer from a lack of water, the Souf region has suffered from a problem of rising water levels that has had a negative impact on the state of ‘Ghouts’. The purpose of this study is to establish an inventory of the situation in two areas of the large agro-ecological region (Souf), based on local potential criteria, The situation and future of the ‘Ghout’ system and the strategies of local actors to combat the phenomenon of upwelling. Our field investigations reveal that it is under the combined effect of urban expansion and the problem of rising water tables that the ‘Ghout’ system is currently in a dying phase. Description: Revue des BioRessources 2021-06-30T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27443 Titre: LA PRESERVATION DES CULTIVARS DE PALMIERS DATTIERS SOURCE DE DURABILITE DU SYSTEME PHOENICICOLE: CAS DE LA REGION DE OUARGLA Auteur(s): IDDER-IGHILI Hakima; DADAMOUSSA Mohamed Lakhdar; BELAROUSSI Mohamed El Hafed; BOUMADDA Abdelbasset; IDDER Mohamed Azzedine Résumé: In Ouargla, the current phoenicicultural potential I sbothrich and diversified. It covers an area of more than 24,110 ha and has more than 2,399,145 feet of which 1,906892 producing more than one million quintals per year. The palm groves of thisregionstillretain a significantvarietaldiversity, date palm cultivars are part of thisheritage. We have identified 55 cultivars, 22 of which are rare. This varietaldiversityislowcompared to the large number of date palms. We have alsofoundthat about 70% of palm trees are over 50 yearsold, whichraises questions in terms of regeneration of palm groves. A renewal management plan must beinitiated to anticipate the aging of the Ouargla palm grove. Varietaldiversityis more or lesspresent but in a disparate waybetween the palm groves. However, the two main varietiesGhars and Deglet-Nour are present in nearly 60% of the palm grovessurveyed. The main secondary cultivars in the region are: Ajina, Ammeria, l'Anba, Ouzal, Sbaa- Badra. The plantingmethodisorganizedwith a spacing of 12 x 12 m in Hassi Ben Abdellah. In the rest of the palm grovesthisspacingis not necessarilyrespected. itisnecessary to think about the creation of local or regional collections, such as a Phoenicicole garden at the KASDI Merbah-Ouargla University, whichis in the planning stage, and to makeavailable to farmers a certain number of cultivars thatcurrentlyexist but in verylownumber in order to avoid the disappearance of thisheritage Description: Revue des BioRessources 2021-06-30T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27438 Titre: SUSTAINABILITY OF PHOENICULTURAL SYSTEMS (CASE OF THE OUARGLA REGION) Auteur(s): IDDER Mohamed Azzedine; IDDER-IGHILI Hakima; DADAMOUSSA Mohamed Lakhdar; BELAROUSSI Mohamed El Hafed; BOUMADDA Abdelbasset Résumé: The sustainability of phoenicoles systems is a multidimensional and multicriteria concept. This notion takes into account criteria which vary according to the researchers and the schools. Some mention the socio-economic and ecological dimensions; others add the agrological dimension... After several readings, on this notion of sustainability, with its indicators, methods and diagnoses (IDEA, AHP ...), and to simplify the task, we took into account the following elements: socio-economic, agronomic (technical) and environmental to assess the sustainability of the three phoenicicultural systems present in Ouargla, namely; bour, ksourien and current.On the basis of several readings, in particular the survey work carried out in the region, we found it useful to assign a rating to the selected criteria, according to their importance, in order to make this sustainability visible. Preliminary results have shown that the bour system is extinct, if not on the verge of extinction. The Ksourian system is also in marked decline on all socioeconomic, agronomic and environmental levels, despite several indicators confirming the sustainability of this system. Here, it is therefore a question of thinking of a conversion of public utility. As for the current system, some farms are following a trajectory of sustainability, while the vast majority is failing. If interventions are necessary to be carried out to save as soon as possible certain assets closely linked to the notion of sustainability, the “public power” parameter, in other words political, must imperatively be one of the three other parameters retained. Description: Revue des BioRessources 2021-06-30T00:00:00Z