Hostname: page-component-7479d7b7d-t6hkb Total loading time: 0 Render date: 2024-07-10T14:30:29.981Z Has data issue: false hasContentIssue false
  • English
  • Français

POPULATION TRENDS AND BEHAVIOR OF THE PEAR RUST MITE, EPITRIMERUS PYRI (PROSTIGMATA: ERIOPHYOIDEA), ON PEARS IN NOVA SCOTIA1

Published online by Cambridge University Press:  31 May 2012

H. J. Herbert
H. J. Herbert
Affiliation:
Agriculture Canada, Research Station, Kentville, Nova Scotia B4N 1J5
Get access Rights & Permissions [Opens in a new window]

Abstract

The pear rust mite, Epitrimerus pyri (Nal.), overwinters in a semi-active state in old leaf scar crevices and under bud chips of the leaf clusters. It becomes active within the bud in mid-April, as soon as the weather warms, and passes through three generations in the growing season as indicated by distinct peak egg populations observed in May, June, and July. The first generation eggs are laid within the swelling bud. The mites feed on the ventral surface of the leaves causing bronzing and on the calyx end of the fruit resulting in russeting of the epidermal tissue. Deutogynes of the third generation begin to enter hibernation by mid-August. Occasionally population levels reach economic injury level resulting in the downgrading of fruit.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 8 , August 1979 , pp. 955 - 957
Copyright
Copyright © Entomological Society of Canada 1979

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

Brittain, W. H. 1916. Apple and pear mites. A. Rep. of the Secretary for Agriculture, Nova Scotia, for the year 1916.Google Scholar
Easterbrook, M. A. 1978. The life history and bionomics of Epitrimerus pyri (Acarina: Eriophyidae) on pear. Ann. appl. Biol. 88: 13–22.CrossRefGoogle Scholar
Henderson, C. F. and McBurnie, H. S.. 1943. Sampling technique for determining populations of the citrus red mite and its predators. U.S. Dep. Agric. Circ. 671.Google Scholar
Herbert, H. J. 1974. Notes on the biology of the apple rust mite, Aculus schlechtendali (Prostigmata: Eriophyoidae), and its density on several cultivars of apple in Nova Scotia, Can. Ent. 106: 1035–1038.CrossRefGoogle Scholar
Herne, D. and Simpson, C.. 1976. The pear rust mite. Can. Fruit Grower 32(2): 6–7.Google Scholar
Jeppson, L. R., Keifer, H. H., and Baker, E. W.. 1975. Mites injurious to economic plants. University of California Press, Berkeley and Los Angeles. 614 pp.CrossRefGoogle Scholar
Morgan, C. V. G. and Arrand, J. C.. 1969. Pear rust mite and its control in British Columbia. Report British Columbia Department of Agriculture Branch. 69–8.Google Scholar
Westigard, P. H. 1975. Population injury level and sampling of the pear rust mite on pears in southern Oregon. J. econ. Ent. 68: 786–790.CrossRefGoogle Scholar