| alfalfa leafcutting bee population dynamics, flower availability, and pollination rates in two oregon alfalfa fields. | since the 1970s, it has become increasingly difficult for u.s. alfalfa seed producers to maintain megachile rotundata (f.) populations used for alfalfa, medicago sativa l., pollination. in 1998, we monitored m. rotundata population dynamics and foraging behavior, as well as alfalfa bloom and pollination rates in two fields in eastern oregon. despite marked differences in bee management, establishment was very similar in the two fields (approximately 0.5 females per nesting cavity) and lagged pea ... | 2005 | 16156556 |