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The specialist international beekeeping organisation
Tropical Agriculture Issue 54 Vol 4 pages 353-363.
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Of the 48 insect species of 7 orders captured on C. cajan flowers on 4 plots, Megachile species accounted for 31% of the total number of insects caught and Apis dorsata for 4.5%; a single Apis florea was caught. Bees collected both nectar and pollen from the flowers.
The foraging behaviour of A. dorsata A. florea Megachile spp. and Xylocopa spp. was observed on a fifth plot and is described in detail. A. dorsata and Megachile spp. discriminated between a cultivar with flowers of normal structure preferred by Megachile and one with flowers of a modified structure preferred by A. dorsata.
Although most insects carried some C. cajan pollen it is thought that Megachile spp. are responsible for most of the cross-pollination which occurs.