“…The management of several new pollinators is recently developing (Parker et al, 1987;Batra, 1994;Stubbs et al, 1994). New techniques for mass rearing bumble bees (Ptacek, 1985;Röseler, 1985;van (Allard, 1911;Green, 1955;Fronk and Slater, 1956;Medler, 1956; ), but as knowledge of ecosystem dynamics and change increased, more attention was paid to this subject, especially the relationships between native bees, honey bees and plants (Primack and Silander Jr, 1975;Schemske and Horvitz, 1984;Herrera, 1987Herrera, , 1989Harder and Thomson, 1989; Thomson, 1989, 1992;Young and Stanton, 1990;Westerkamp, 1991a,b;Willmer, 1991;Wilson and Thomson, 1991;Chagnon et al, 1993;Kunin, 1993;Cresswell, 1994;Marquez et al, 1994a,b Parker et al, 1987;Torchio, 1991), general awareness of the diversity of bee species and public knowledge of their value to ecosystems is increasing (Morse, 1960;Malyshev, 1963;Michener, 1979;Schreck and Schedl, 1979;Westrich, 1983bWestrich, , 1990MacKenzie and Winston, 1984;Scott-Dupree and Winston, 1987;Zöckler, 1988;Banaszak, 1989a;O'Toole, 1993;Adams and Senft, 1994 (Emeis, 1...…”