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mdash; Nectar sugar production per flower of Prunus puddum (during 8 h of flower opening) was 4·15 mg, when the nectar was removed at short intervals, compared to 1·89 mg/flower in flowers of the same age where nectar was allowed to accumulate. Similarly, nectar removal every 24 h after flower opening resulted in more nectar sugar production. Flowers where nectar was allowed to accumulate resorbed nectar. Analysis of nectar revealed the presence of glucose, fructose, sucrose and 1 unidentified sugar. Honeybees (Apis cerana indica and A mellifera) foraged both for nectar and pollen on the flowers. The activity of pollen gatherers peaked during early morning hours (8-9 h) and that of nectar gatherers at 11 h. A mellifera spent more time per flower than Ac indica, whether foraging for nectar or pollen. Honeybees preferred 24and 48-h old flowers to freshly opened flowers or those older than 48 h.

Pattern of nectar secretion in wild cherry, Prunus puddum Roxb, and the associated foraging behaviour of Apis cerana indica F and Apis mellifera L