Publications Internationales

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Author: search.filters.author.Jamal Haddad, NizarSubject: search.filters.subject.Honey bee

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    Detection of deformed wing virus in the local bee colonies apis mellifera intermissa in algeria and its relationship with varroa destructor
    (2014) Adjlane, Noureddine; Jamal Haddad, Nizar
    Honeybees are threatened by over 18 viruses, nowadays deformed wing virus (DWV) is known to be one of the most prevalent virus worldwide.. This is the first study in Algeria and most North Africa region which is evaluating the prevalence of the DWV in beehives. The objective of this study is to eva-luate the impact of this virus on honey bees mortality, and its relationship to infestation with the Varroa destrutor parasitic mite. We conducted this study on an apiary located in the central region of Algeria. PCR results showed the presence of DWV in Apis mellifera intermissa honey bee colonies, where 42% of the samples are infected with the virus. We highlighted the role of V. destructor and its association with the DWV and the mortality recorded in the same apiary
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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
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    Study of the Efficacy of Oxalic Acid and Thymovar (Thymol) against the Parasitic Mite of the Honey Bee, Varroa destrutor
    (Egyptian Academic Journal of Biological Sciences. A, Entomology, 2020) Adjlane, Noureddine; Smaoui, Redha; Jamal Haddad, Nizar
    Varroasis is a dangerous pathogen of the honey bee caused by the mite Varroa destructor, the aim of this work is to assess the effectiveness of two natural products (oxalic acid and thymol) in the fight against varroasis. The experiment covered 40 colonies in the central region of Algeria. Two doses of oxalic acid were used: 30 and 45 grams per liter of sugar syrup. For thymol (Thymovar), two treatments were carried out: ½ strip with one and two applications for each group of colonies. The 1/2 strip formulation in two applications at an interval of two weeks apart seems the most effective; the 45 gm solution of oxalic acid has a higher efficacy compared to that of 30 gm, that the effectiveness of oxalic acid is directly linked to the presence of brood at the time of the intervention. these two treatments are of control measure to be integrated by beekeepers as part of an alternative control strategy