2006 Cilt 6 Sayı 4

Permanent URI for this collectionhttps://hdl.handle.net/11452/15702

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Browsing by Subject "Apis mellifera L."

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    Development and control of the varroa (varroa destructor) ın honey bee (apis mellifera.) colonıes and effects on the colony productıvıty
    (Uludağ Üniversitesi, 2006) Akyol, Ethem; Karatepe, Bilge; Karatepe, Mustafa; Karaer, Zafer
    This study was carried out to determine the rate of Varroa (varroa destructor) infestation of both brood and adult honeybees (Apis mellifera anatoliaca), struggle with it and effect on the productivity of the colonies. The rate of varroa infestation, on 15 honeybee colonies in three apiaries, was investigated both at the beginning of the study and during the control period (every 24 days on worker bees, within closed worker and drone brood cells). Varroa infestation rate has continually increased in all groups until the first chemical treatment (26 july 2004). Following chemical treatment, infestation level of Varroa has clearly decreased. Until the second chemical application (25th October 2004), Varroa infestation level kept increasing on adult worker bees, within closed worker and drone brood cells. After the second chemical application, Varroa infestation rate has decreased remarkably in all experimental colonies. The average rate of varroa infestation in drone brood cells (24.14% in group I, 59.08% in group II, 81.72% in group III ) was found higher than both in Worker brood cells (1.44% in group I, 3.52% in group II, 4.76% in group III) and on adult worker bees (8.88% in group I, 12.54% in group II, 17.32% in group III). The number of Varroa has reached the maximum level after the number of drone cells were the highest. Level of varroa infestation had a negative effect on population growt and honey production of the colonies. Much infested colonies (Group II and III) had lower adult bee populations (10.16±0.46 and 10.10±0.47 number frame/colony) and produced less honey(24.20±2.68 and 26.20±3.70 kg/colony) than Less infested (Group I). colonies (12.80±0.47 number frame adult vorkerbees/colony, and 34.20±8.83 kg/colony honey).