Publications Scientifiques

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End date: 2019Subject: search.filters.subject.Algeria

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    La maîtrise de la démarche à l’exportation, un atout pour l’internationalisation de l’entreprise algérienne et la promotion des exportations hors hydrocarbures
    (Université M'Hamed Bougara Boumerdes /Laboratoire de recherche avenir de l’économie algérienne hors hydrocarbure, 2016) Benzerroug, Ramzi Mourad
    In order to ensure the diversification of the economy and reduce dependence on export earnings from oil and gas, Algeria is making continuous efforts in order to make bets on improving the environment, legislative, institutional and public policies related to promoting exports and exporters, as well as to control the pace of the export process. Nevertheless, public authorities and actors in the sphere of foreign trade abut on various obstacles including poor experience companies, export environment and the establishment of an export strategy. At the same time, the national export outside hydrocarbons champions are making significant efforts that have helped develop for each of them a unique experience to place their products on international markets
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    Inhibitory effect of Trichoderma harzianum on mycelial growth of Fusarium oxysporum f. sp. radicis-lycopersici and Alternaria solani
    (Springer Netherlands, 2018) Lakhdari, Wassima; Dehliz, Abderrahmene; Mlik, Randa; Hammi, Hamida; Benlamoudi, Wiam; Acheuk, Fatma; Doumandji-Mitiche, Bahia B.
    Tomato is one of the most important fruit vegetables for human consumption in Algeria. In recent years, the cultivation of this plant is experiencing a very rapid development. However, this speculation is confronted with several problems including plant health. The purpose of this study is to find biological ways to introduce them into an integrated control program against tomato pests and have an organic agriculture that can increase the production of this culture. Direct confrontation test of an indigenous strain of Trichoderma harzianum with two phytopathogenic fungi that are isolated from tomato leaves (Fusarium oxysporum f. sp. radicis-lycopersici and Alternaria solani) was carried at 26 °C on an artificial culture medium (PDA). It could be demonstrated that T. harzianum inhibited mycelia growth of the two fungi with more than 40% and only after 4 days of incubation. Statistical analysis confirms that T. harzianum had a significant effect of antagonism against the tested pathogens mentioned before with P value 0.02 and 0.04, respectively. Beyond this period, and at the end of the sixth day, T. harzianum occupied the colonies of fungus and began to sporulate marking a very important myco-parasitic power. Indeed, a percent inhibition greater than 50% was recorded into the both fungi
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    Association of oxalic and lactic acid for varroa control in Algeria August 2010
    (2010) Adjlane, Noureddine
    Today, the chemical control of Varroa with pyrethroids is difficult, as they are no longer effective. Thus, it is interesting to use natural products such as organic acids. Oxalic and lactic acid were used for the first time in Algeria on 30 colonies of Apis mellifera intermissa in Langstroth hives: A. 45 g of oxalic acid dehydrate dissolved 1 litre 50 % sucrose syrup B. 30 g of oxalic acid dehydrate dissolved 1 litre 50 % sucrose syrup C. Two applications with 5 ml 15 % lactic acid carried out by pouring the acid between the frames, with a 7 day interval Dead Varroa were counted during the trial period by means of greased bottom inserts covering the hive bottom two weeks after the use of the organic acids. The efficacy of the oxalic lactic acid depends on the presence of brood at the time of the treatment. Following efficacies were measured: Application A.: 82.6 %, application B: 65.5% and application C: 75.23 %. Organic acids must be considered as products for integrated Varroa control in Algeria
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    Efficacy of Varroa destrcutor treatments in Algeria
    (2011) Adjlane, Noureddine; Jamal Haddad, Nizar
    Varroa destructor was registered for the first time in Algeria in 1981 through the Algerian-Tunisian border to the east. Since then Algeria has approved the use of several products to control varroa, in order to minimize the impact of this parasite on the bee colonies and honey production. This experiment was conduted in order to study current effectiveness of varroa treatments registered in Algeria,varroa resistant to these treatments ,The trials were conducted in the region of Mitidja (central Algeria) on 75 hives spread over three apiaries. All colonies where equipped with a mesh tray with insert as a diaper greased roasting for counting dead mites. The control treatment is performed with oxalic acid drip; effectiveness was measured by comparing the mites killed during the experimental treatments to mites killed during a control treatment. The results showed a variation in efficacy between the treatments used Bayvarol saves the efficiency ratio is the most important (94.33%), followed Apistan and Apivar with 87.54% and 82.67% respectively. We note a decrease in the efficiency of these products, tests for resistance in vitro are needed to confirm this decline and to detect possible problem of resistance. Natural treatments based on thymol record the lowest with 79.34% for and 72.65% for Thymovar and Apigaurd. Thymol as Apiguard and Thymovar can be regarded as complementary therapies to be integrated into a control program because the success rate is low and thus the beekeeper is required to use an alternative treatment. The information obtained from this study concerning drug efficacy and resistance acaricides are essential for defining the control strategies adapted to the therapeutic treatment of Varroa disease in Algeria.
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    Survey of American foulbrood in honey bee colonies Apis mellifera intermissa in mid- northen region of Algeria (2010-2011)
    (2012) Adjlane, Noureddine; Bounar-Kechih, Saliha; Jammal haddad, Nizar
    American foulbrood caused by Paenibacillus larvae is one of the most serious bacterial diseases of honey- bee brood. Few data are currently available on the prevalence of this disease in Algeria. This study pro- vides an overview of the prevalence of this disease in the Mid-North. Samples of adult bees were collected from 65 apiaries. Detection of spore samples was performed using methods bacteriological, microscopic and biochemical. Spores of Paenibacillus larvae were detected in 23.5 % of the apiaries examined in 2010 and 30 % in 2011. The prevalence of the wreck is different from one region to another. Many factors can possibly explain this difference in the prevalence of the disease.
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    Detection of paenibacillus larvae spores in honey samples from beekeepers of the central region of algeria
    (Slovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, 2013) Adjlane, Noureddine; Ameur lain, Karima; Gharabi, Nassiba; Lecksir, Nawel; Haddad, Nizar
    The American foulbrood in one of the most serious diseases that may affect brood of larvae and pupae stages, which cause economic losses and biological hazards in a large beekeeping sector in several countries across the world in general and Algeria in particular. The causative agent of this disease is a bacterium called Paenibacillus larvae that target bees Apis mellifera the latter are often present in honey.The aim of this project is studying the spread of this disease in the northern region of Algeria through the analysis of honey obtained from these areas. Microbiological, microscopic and biochemical methods were used in this study. The results obtained have shown that the prevalence rate varies from region to region, several factors may explain this variation in the prevalence of the disease. The average infection rate for all regions is 32%. To prevent the spread of this disease in Algeria must be taken is mandatory and means of prevention into account.
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    Varroa destructor resistance to fluvalinate in Algeria
    (2013) Adjlane, Noureddine; Jamal Haddad, Nizar; Doumandji, Salaheddine
    Varroa destructor Anderson & Trueman, is considered as a major problem for the beekeeping sector, not only for Apis mellifera L. in Algeria but also worldwide. In cases of no control it can cause severe problems that may end in the death of honeybee colonies. Fluvalinate is the predominant compound used in Algeria to control V. destructor, its constant application has caused the appearance of resistant mite populations to this product in several parts of the world. This study was conducted to detect the possible existence of populations of resistant mites to fluvalinate in the area north-center of Algeria. To determine the mites mortality percentage to the fluvalinate, they were exposed to strips of 2.5 x 1.0 cm. Varroa mortality in apiaries treated with fluvalinate was 41.23%, lower than the 81.51% mortality obtained in apiaries that only received an alternative treatment. A significant difference (P > 0.05) was found between two mortality of Varroa. These results show for the first time the existence of Varroa destructor populations resistant to fluvalinate in Algeria. These results are essential for beekeeping sector not only in Algeria but also in Africa since very little data is available on this issue in the northern parts of Africa.
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    The first data on hygienic behavior of Apis mellifera intermissa in Algeria
    (2014) Adjlane, Noureddine; Jamal Haddad, Nizar
    Hygienic behavior is considered as an important factor in selection programs of resistance honey bee mite to Varroa destructor, the objective of this study was to evaluate this behavior Apis mellifera intermissa, the local honey bee race of Algeria. The study was performed on 40 colonies in spring and fall. The results had show a variation in the removal rate of dead brood where it was 91 .56% in spring and, 83.55% in autumn. This is the first test of hygienic behavior in Apis mellifera intermissa in Algeria. We can conclude, that the Algerian local bees are characterized by a good cleaning ability.
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    Atypical viral and parasitic pattern in Algerian honey bee subspecies Apis mellifera intermissa and A. m. sahariensis
    (Springer Verlag, 2016) Adjlane, Noureddine; Dainat, Benjamin; Gauthier, Laurent; Dietemann, Vincent
    Unusually high losses of honey bee colonies are reported in many regions of the world, but little data isavailable concerning the status of honey bee stocks in Africa. However, the situation on this continent, wherebeekeeping is weakly developed and where the wild population of the pollinator remains large, can give us an insighton the causes of increased mortalities elsewhere. In this study, we evaluate the health status ofApis melliferaintermissaandA. m. sahariensispopulations inhabiting the north and the south of Algeria, respectively. We reportfew colony losses associated with an atypical pattern of prevalence for common honey bee parasites and pathogens.The presence or absence of these risk factors is discussed in relation to the occurrence of local and global colonylosses to contribute to our understanding of how honey bee pathogens and parasite impact this pollinator’s health