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Titre: | Population dynamic of Varroa Destructor in the local honey bee Apis Mellifera Intermissa in Algeria |
Auteur(s): | Adjlane, Noureddine Benaziza, Benaziza Jamal Haddad, Nizar |
Mots-clés: | Varroa destructor Apis mellifera intermissa population dynamic Mediterranean climate |
Date de publication: | 2015 |
Editeur: | BPAS Publications |
Collection/Numéro: | Bulletin of Pure and Applied Sciences. Vol.34 A (Zoology),n° 1-2;p p. 25-37 |
Résumé: | Population dynamics of Varroa destructor were studied for two years
(septembre 2012– 2014) in 20 Apis mellifera intermissa colonies located in
Blida (center of Algeria). The number of bees, the amount of open brood
and capped, daily natural mortality, level of infestation of adult bees and
level of infestation of the brood, was monitored.
The brood cycle and behavior of reproduction in Apis mellifera intermissa
is set by exceptional and seasonal contrasts in climate: dry summer (June to
September), with an almost complete stop brood. Autumn, relatively wet
causes a second peak of activity and brood development. The values of
the infestation rate of brood and bees show peaks in August, this period
when there is the minimum amount of both bees and brood in the colony.
In all colonies, the population of Varroa presented during the spring curve
of exponential growth, which is explained by the continued presence of
brood. In the growth phase, followed by a collapse of populations of mites,
which in our experimental conditions, occurred from early summer, along
with a weakening of colonies phase. Successive brood cycles allow the
population growth of Varroa, while the absence of brood during the
summer months has the opposite effect of reducing populations of Varroa.
It appears that the level of Varroa infestation in colonies varies according to
climatic conditions (seasonal) and internal conditions of each colony. In
Mediterranean climates of Algeria, the milder winter climatic conditions
and the possibility to collect food resources during a considerable part of
the winter count for the permanent brood-rearing activity of honey bee
colonies, which is relevant for the intrinsic growth rate of Varroa in these
regions. |
URI/URL: | https://www.indianjournals.com/ijor.aspx?target=ijor:bpaszo&volume=34a&issue=1and2&article=004 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6357 |
ISSN: | 0970 0765 |
Collection(s) : | Publications Internationales
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