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Filtering by: Subject Pear -- Diseases and pests -- Oregon Degree Level Doctoral Subject Apples -- Diseases and pests

Ecology of mites on pomaceous fruit trees and related wild hosts in Hood River Valley

Creator:

Jorgensen, Clive Darrel

Abstract:

The ecological interrelationships of mites occurring in and near the Hood River Valley, Oregon, pome fruit orchards were investigated to determine the possibility of an integrated control program using the species already present. Survey sampling methods were used to study mites on wild hosts (Crataegus douglasii Lindl., Crataegus columbiana Howell,...

Resource Type:

Dissertation

Full Text:

.) related to pome fruits, abandoned and commercial apple and pear orchards, and soil with its cover in
Host selection, reproductive biology, host-specific development and mortality of the codling moth, Cydia pomonella (L.) (Lepidoptera: Torticidae), in apple and pear

Creator:

Marti, Santiago Marti

Abstract:

The biology and behavior of the codling moth, Cydia pomonella (L.), was studied to determine factors responsible for differences in susceptibility to moth damage among apple and pear cultivars. In release experiments, codling moth adults were intercepted in significantly greater numbers in host (apple, pear) than in non-host (maple) trees,...

Resource Type:

Dissertation

Full Text:

and Mortality of the Codling Moth, Cydiapomonella (L.) (Lepidoptera: Tortricidae), in Apple and Pear