LITERATURE CITED
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- Goettel, M. S., J. D. Vandenberg, G. M. Duke, and G. B. Schaalje. 1993. Susceptibility to chalkbrood of alfalfa leafcutter bees, Megachile rotundata, reared on natural and artificial provisions. J. Invertebr. Pathol. 61: 58–61.
- Kish, L. P. 1980. Spore germination of Ascosphaera spp. associated with the alfalfa leafcutting bee, Megachile rotundata. J. Invertebr. Pathol. 36: 125–128.
- McManus, W. R., and N. N. Youssef. 1984. Life cycle of the chalk brood fungus, Ascosphaera aggregata, in the alfalfa leafcutting bee, Megachile rotundata, and its associated symptomatology. Mycologia 76: 830–842.
- Pinnock, D. E., Coles, R. B. and Donovan, B. 1988. Aust. Syst. Bot. 1: 387–389.
- Raper, K. B., and Fennell, D. I. 1965. The genus Aspergillus. Williams & Wilkins Co. Baltimore. 686 pp.
- Skou, J. P. 1972. Ascosphaerales. Friesia 10: 1–24.
- Skou, J. P.. 1975. Two new species of Ascosphaera and notes on the conidial state of Bettsia alvei. Friesia 11: 62–74.
- Skou, J. P.. 1982. Ascosphaera asterophora species nova. Mycotaxon 14: 149–159.
- Skou, J. P.. 1988. Japanese species of Ascosphaera. Mycotaxon 31: 173–190.
- Skou, J. P., and Hackett, K. 1979. A new, homothallic species of Ascosphaera. Friesia 11: 265–277.
- Skou, J. P., and Hackett, K., and Holm, S. N. 1989. Ascosphaera tenax species nova and a variant of Ascosphaera aggregata. Mycotaxon 35: 211–218.
- Skou, J. P., and Hackett, K., and Holm, S. N., and King, J. 1984. Ascosphaera osmophila sp. nov., an Australian spore cyst fungus. Aust. J. Bot. 32: 225–231.
- Vandenberg, J. D. 1992. Bioassay of the chalkbrood fungus Ascosphaera aggregata on larvae of the alfalfa leafcutting bee, Megachile rotundata. J. Invert. Pathol. 60: 159–163.
- Vandenberg, J. D., and W. P. Stephen. 1982. Etiology and symptomatology of chalkbrood in the alfalfa leafcutting bee, Megachile rotundata. J. Invert. Pathol. 39: 133–137.