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Honeybee activity on kohlrabi plants



Honeybee activity on kohlrabi plants



Acta Universitatis Agriculturae, Brno, A Facultas Agronomica 22(2): 341-349



A single kohlrabi flower secreted, on average, 5.0-6.5 mg nectar with a sugar (glucose and fructose) content ranging from 30.2% to 30.9%. It could be calculated that a kohlrabi crop therefore produced 37-52 kg sugar/ha. Honeybees were found to visit and pollinate 7-9 flowers per min. In 1971 (a favouralbe season) an average of 45 500 bees/ha were observed foraging the crop between 12.00 and 14.00 h, and it is calculated that 2 colonies/ha would be sufficient to ensure adequate pollination.D.G.

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