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Author: search.filters.author.Jamal Haddad, NizarSubject: search.filters.subject.Varroa destructor

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    Evaluation of the efficacy of different acaricides again st Varroa destructor on Apis mellifera intermissa in Algeria
    (2013) Adjlane, Noureddine; Jamal Haddad, Nizar; El-ouness, Tarek
    Varroa mite has become a major concern of beekeepers in Algeria since the discovery of the first cases of infestation in the year 1982. The objective of this study was to test different registered chemicals aside with those prepared by beekeepers. The experiment was conducted on 50 Apis meliffera intermissa colonies in a commercial apiary and kept in standard Langstroth hives. Among the products which are approved in Algeria and tested in our experiment are Bayvarol which recorded the highest efficiency rate (91.62%), followed by Apivar (86.50%) and then Apistan (77.75%). Traditional preparations treatments had very low efficiency where it was only: 39.37% for amitraz and 44.21% for tau-fluvalinate (Mavrik). Our study showed a reduction in the efficiency of commercial products (Apistan, Bayvarol and Apivar) and a very low efficiency for amitraz and Mavrik. Such results prove the high demand of searching for more effective treatments against Varroa
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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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    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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    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.