Effects of temperature and host developmental stage on Ascosphaera torchioi Youssef and McManus prevalence in Osmia lignaria propinqua Cresson (Hymenoptera: Megachilidae)R. Rusta and P. Torchiob
a University of Nevada, Department of Biology, Reno, NV 89557-0015, USA
b Utah State University, USDA ARS Bee Biology and Systematics Laboratory, Logan, UT 84322-5310, USA
Abstract - Eggs and fifth instar larvae of Osmia lignaria propinqua were inoculated with known concentrations of Ascosphaera torchioi spores and reared at 3 different temperatures. Chalk-brood prevalence was highest following inoculation of bees in the egg stage and when reared at lower temperatures (21 °C).
Key words: Osmia / chalk brood / mycosis / etiology