Time and energy budgets of alfalfa pollinating beesMegachile nana bingh andMegachile flavipes Spinola (Hymenoptera: Megachilidae)
Laboratory measurements of physiological energetics were coupled with the field observations on time budget/energy intake ofMegachile nana andMegachile flavipes to estimate the daily energy budget. The energy budget varied from one day to another, and crop to crop. In general, the foraging profitability/attractibility was in the following order for both the species:Parkinsonia aculeata> Medicago sativa> Trifolium alexandrium. The studies revealed the competitive superiority ofParkinsonia aculeata overMedicago sativa andTrifolium alexandrium.
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