8R.R.James and T.L.Pitts-Singer.Ascosphaera aggregata contamination on alfalfa leafcutting bees in a loose cell incubation system[J].Journal of Invertebrate Pathology,2005,89(2):176 ～ 178.
9John.D.Vandenberg.Bioassay of the chalk brood fungus Ascosphaera aggregata on larvae of the alfalfa leafcutting bee,Megachile rotundata[J].Journal of Invertebrate Pathology,1992,60(2):159 ～ 163.
10J.M.Flores,I.Gutierrez.and F.Puerta.Oxytetracycline as a predisposing condition for chalk brood in honey bee[J].Veterinary Microbiology,2004,103 (3):195 ～ 199.
