Index Catalog // ScholarsArchive@OSU

Start Over

Filtering by: Subject Hazel -- Diseases and pests -- Biological control -- Oregon Decade 1990-1999

The potential of endemic natural enemies to suppress pear psylla, Cacopsylla pyricola Förster, in the Hood River Valley, Oregon

Creator:

Booth, Steven R.

Abstract:

This thesis addressed the potential of endemic predaceous and parasitic arthropods of the Hood River Valley, Oregon to suppress the pear psylla, Cacopsylla pyricola F8rster. Natural enemies adequately suppressed psylla in three of seven unsprayed orchards of differing vegetational settings, orchard age, and size. Relatively few psylla natural enemies dispersed...

Resource Type:

Dissertation

Full Text:

immatures and their natural enemies 64 Psylla russet damage 68 Incidence of pear psylla biological control