Eight methods for ventilating confined honeybee colonies during the application of insecticides
M. A. Abd Al-Fattah And A. A. M. El-Shemy
Eight ventilation methods were tested during confinement of 108 honeybee colonies for 1.5 or 3 days. These methods were: (1) ventilation bottom board on hive stand (VBBs), (2) ventilation bottom board on ground (VBBg), (3) honey section super with top wire screen (HSSt) or (4) with bottom wire screen (HSSb), (5) empty Langstroth box with top (ELBb) or (6) bottom wire screen (ELBb), (7) wire screen cage (ASWc) and (8) two sides wire screen cage (TSWc). Differences associated with regulating the internal temperature appeared significant between the methods using HSSt and ELBt compared with ASWc, although temperature remained within the optimum range (34·5-36·2°C). The average water consumption ranged from 0.383 to 0.666 Vcol. and the number of dead bees ranged from 42.82 to 367.75 bees/col. Highly significant differences were found in the number of dead bees and water consumption between weak and strong colonies throughout the periods of confinement. The tested ventilation methods could be ranked according to their effectiveness during confinement as follows: VBBs, VBBg, HSSt, Elbt, TSWc, ASWc, HSSb and ELBb.
ventilating confined honeybee colonies, application of insecticides, honeybees