Foraging behaviour ofApis ceranaon cauliflower and cabbage and its impact on seed production
| Autor: | Uma Partap, L R Verma |
|---|---|
| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Journal of Apicultural Research. 33:231-236 |
| ISSN: | 2078-6913 0021-8839 |
| Popis: | SUMMARYIn the Kathmandu valley of Nepal, cauliflower (Brassica oleracea var. botrytis) and cabbage (Brassica oleracea var. capitata) plants had averages of 7 branches with 600 flowers and 12 branches with 94 flowers, respectively. Flower diameter was 14.9 mm in cauliflower and 13.8 mm in cabbage. The yellow flowers of both crops opened in the morning and remained open for two to three days; the total flowering period of each crop lasted for about one month, with cauliflower beginning in mid-February and cabbage in mid-March. Apis cerana colonies were caged individually with plants of the target crops. Bees started foraging on cauliflower and cabbage at c. 07.00 h and 06.30 h, respectively, and ceased flight activity at c. 18.00 h and 18.30 h, respectively. Foraging on cauliflower started at ambient temperatures of 7°C. Peak foraging activity was between 11.00 h and 13.00 h for each crop. The duration of individual foraging trips was 26.9 min for cauliflower and 23.9 min for cabbage. Visits to individual f... |
| Databáze: | OpenAIRE |
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