Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-25T07:05:19.065Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations on the Natural Control of the Pear Psylla, Psylla pyricola Förster, in California

Published online by Cambridge University Press:  31 May 2012

H. F. Madsen ,
P. H. Westigard  and
R. L. Sisson
H. F. Madsen
Affiliation:
University of California, Berkeley
P. H. Westigard
Affiliation:
University of California, Berkeley
R. L. Sisson
Affiliation:
University of California, Berkeley
Get access Rights & Permissions [Opens in a new window]

Abstract

Studies in 1961 and 1962 showed that several naturally occurring conditions suppress the pear psylla. Temperatures above 100°F. caused mortality of nymphal stages and reduced adult oviposition. Crystallization of honeydew was a mortality factor in a few instances, and seemed to be associated with high temperature and low humidity. Absence of new growth and poor condition of leaves caused a steady decline in pear psylla numbers in abandoned orchards. Anthocoris antevolens White was an effective predator in unsprayed orchards and significantly reduced pear psylla populations. A parasite, Trechnites insidiosus (Crawford) was encountered, but its significance as a mortality agent was not determined.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 8 , August 1963 , pp. 837 - 844
Copyright
Copyright © Entomological Society of Canada 1963

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

Anderson, N. H. 1962. Anthocoridae of the Pacific Northwest with notes on distributions, life histories, and habits (Heteroptera). Canad. Ent. 93: 1325–1334.Google Scholar
Bethell, D. 1960. Report on pear psylla. Western Fruit Grower 14: 24.Google Scholar
Burts, E. 1961. Unpublished report to Western Cooperative Spray Project.Google Scholar
Georgalla, M. B. 1957. A contribution to the biology of the pear psylla sucker, Psylla pyricola Foerst. Ann. Rept. East Malling Res. Sta. 1956: 133–141.Google Scholar
Jensen, D. D. 1957. Parasites of the Psyllidae. Hilgardia 27: 71–99.Google Scholar
List, G. N. 1939. The effect of temperature upon egg deposition, egg hatch, and nymphal development of Paratrioza cockerelli (Sulc.). Jour. Econ. Ent. 32: 1–30.Google Scholar
Madsen, H. F. 1961. Notes on Anthocoris melanocerus Reuter (Hemiptera: Anthocoridae) as a predator of the pear psylla in British Columbia. Canad. Ent. 93: 660–662.CrossRefGoogle Scholar
Madsen, H. F., Sisson, L., Bethell, R. S.. 1962. The pear psylla in California. Calif. Agr. Expt. Sta. Circ. 510: 1–11.Google Scholar
Marlatt, C. L. 1895. The pear-tree psylla. U.S. Dept. Agr. Circ. 7: 1–8.Google Scholar
Marshall, J. 1959. An unusual manifestation in the natural control of the pear psylla, Psylla pyricola Foerst. Proc. Ent. Soc. British Columbia 36: 69–71.Google Scholar
Slingerland, M. V. 1892. The pear-tree psylla. Cornell Univ. Agr. Expt. Sta. Bull. 44: 161–186.Google Scholar
Wilde, W. H. A. 1962. The pear psylla in British Columbia. Canad. Dept. Agr. Res. Sta. Summerland, B.C. 12 p.Google Scholar