Publications Scientifiques

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Author: search.filters.author.Adjlane, NoureddineSubject: search.filters.subject.Algeria

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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
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    Effectiveness of Treatments with Thymol in Controlling Varroa Destructor Parasite of The Honey Bee in Algeria
    (2016) Adjlane, Noureddine; Jamal Haddad, Nizar; Ounesse, Tarek
    Varroa disease is a parasitic disease of adult bees and brood, due to a blood-sucking external parasitic mite, Varroa destructor. This is one of the most dangerous diseases in Algeria. The purpose of this study is to evaluate the effectiveness of two treatments approved based thymol (Thymovar® and Apiguard®) in the fight against varroa in Algerian conditions and to determine the side effects of these treatments on bee colonies local Apis mellifera intermissa. The test was performed on 80 colonies with two different formulations for each treatment. As the results show in our test, a wide variation in the effectiveness between colonies is recorded for both treatments. The average efficiency for the group of colonies ½ Thymovar strap in two applications stood at 84.43%. This efficiency is lower for the group ½ straps in one application (77.23%). For Apiguard, the average efficiency is 81% for formulation 2 x 25g spaced two weeks, against a 79% rate for the formulation of 2X25 spaced one week. During our tests, with a few dead bees and nymphs found on nappies, we never recorded unusually high bee mortality. Further tests are needed to determine the optimal dose and the best time for treatment.
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    Effect of Some Honeybee Diseases on Seasonal Mortality ofApismellifera intermissain Algeria Apiaries
    (Springer, 2018) Adjlane, Noureddine; Jamal Haddad, Nizar
    With a view to identify the pathogens and to establish the role of these pathogens in regulation of the density of honey bee population occurring in the apiaries of the area concerned samples of honeybee were collected from the beekeepers in some parts of central Algeria It is revealed that Nosema sp., Varroa destrutor, Peanibacillus larvae are associated with the disease manifestation in honey bees. The presence of Nosema sp., Varroa destrutor, Peanibacillus larvae was analyzed using standard OIE methods. Spores of Paenibacillus larvae were detected in 56.6 % in winter 52.32 % in spring. 29.33 % in autumn and 11.25 % in summer. Nosema infestation was recorded in 47.91 % bee individuals during spring. Varroa infestation rate was maximum 12.57 % in summer and lowest 3.44 % in spring. Analysis of data indicates that Boumerdes and Tipaza, diseases induced mortality exceeds 10 % in honeybee. There exists a significant correlation between Nosema disease and mortalities in honeybees. Seasons play significant role, irrespective of pathogens, in disease manifestation