TIME APPEARANCE OF NON - INFECTIOUS CHILLED BROOD DISEASE AND ITS EFFECT ON HONEYBEE BROOD AND BEE FORAGING ACTIVITY | ||||
| Minia Journal of Agricultural Research and Development | ||||
| Volume 42, Issue 2, September 2022, Page 187-194 PDF (517.02 K) | ||||
| DOI: 10.21608/mjard.2022.260449 | ||||
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| Abstract | ||||
| Climate changes especially temperature played a big role in the survival of honeybee. The present study evaluated the effect of chilled brood disease from three axes: relationship with temperature, brood area and foraging activity during the two successive winter seasons of 2019/2020 and 2020/2021. Results recorded negative relation between chilled larvae and inter/outer temperature: -0.8707 and -3.6313 for inter temperature, -0.3462 and 0.6065 for outer temperature in 2019/2020 and 2020/2021, respectively. On the other hand data showed significant decrease in mean area of larvae reared chilled brood diseases in bad wintering which showed 26.50 inch2 comparing with 36.46 inch2 in reared in perfect wintering (control) and brood area which reduced from 36.46 to 26.50 inch sq. and from 40.59 to 28.88 inch sq. in winter 2019/2020 and 2020/2021, respectively. Finally, foraging bee activity of bees in the obtained results showed high effect between chilled brood symptoms and foraging rate, which decrease the number of returned workers from10.71 to 6.88 bee/min. and from 13.00 to 8.21 bee/min. in seasons 2019/2020 and 2020/2021, respectively. | ||||
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