Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-28T07:05:32.306Z Has data issue: false hasContentIssue false
  • English
  • Français

OCCURRENCE OF CHALKBROOD CAUSED BY ASCOSPHAERA AGGREGATA SKOU IN A NATIVE LEAFCUTTING BEE, MEGACHILE RELATIVA CRESSON (HYMENOPTERA: MEGACHILIDAE), IN SASKATCHEWAN

Published online by Cambridge University Press:  31 May 2012

D.W. Goerzen ,
M.A. Erlandson  and
J. Bissett
D.W. Goerzen
Affiliation:
Saskatchewan Alfalfa Seed Producers' Association, 107 Science Crescent, Saskatoon, Saskatchewan, Canada S7N 0X2
M.A. Erlandson
Affiliation:
Agriculture Canada Research Station, 107 Science Crescent, Saskatoon, Saskatchewan, Canada S7N OX2
J. Bissett
Affiliation:
Biosystematics Research Centre, Agriculture Canada, Research Branch, Ottawa, Ontario, Canada K1A 0C6
Get access Rights & Permissions [Opens in a new window]

Extract

The alfalfa leafcutting bee, Megachile rotundata (Fab.), is an important domesticated pollinator of alfalfa grown for seed in Canada. Chalkbrood, a disease caused by the fungus Ascosphaera aggregata Skou, has caused high mortalities in M. rotundata populations in the northwestern United States since 1972. Chalkbrood was found in Manitoba in 1982, Alberta in 1983, and Saskatchewan in 1984 (Richards 1985). Although subsequent surveys have indicated the presence of A. aggregata at high levels in some southern Alberta M. rotundata populations, the disease has been detected only sporadically and at low levels in Saskatchewan populations (Goerzen 1990).

Type
Research Article
Information
The Canadian Entomologist , Volume 122 , Issue 6 , December 1990 , pp. 1269 - 1270
Copyright
Copyright © Entomological Society of Canada 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bissett, J. 1988. Contribution toward a monograph of the genus Ascosphaera. Can. J. Bot. 66: 2541–2560.CrossRefGoogle Scholar
Goerzen, D.W. 1990. Leafcutter bee foliar moulds, their effects on bee populations and producer health, and methods for their control. pp. 21–26 in Proceedings, 21st Annual Northwest Alfalfa Seed Conference, Pasco, WA.Google Scholar
Rank, G.H., and Goerzen, D.W.. 1981. Native leafcutter bee species and associated parasites in commercial hives in Saskatchewan, Canada. Apidologie 12: 211–220.CrossRefGoogle Scholar
Richards, K.W. 1985. Detection of a chalkbrood fungus, Ascosphaera aggregata, in larvae of the alfalfa leaf-cutter bee (Hymenoptera: Megachilidae). Can. Ent. 117: 1143–1145.CrossRefGoogle Scholar
Rose, J.B., and Christensen, M.. 1984. Ascosphaera species inciting chalkbrood in North America and a taxonomic key. Mycotaxon 19: 41–55.Google Scholar
Skou, J.P. 1975. Two new species of Ascosphaera and notes on the conidial state of Bettsia alvei. Friesia 11: 62–74.Google Scholar
Stephen, W.P., and Undurraga, J.M.. 1976. X-radiography, an analytical tool in population studies of the leafcutter bee Megachile pacifica. J. Apic. Res. 15: 81–87.CrossRefGoogle Scholar