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Filtering by: Non-Academic Affiliation Oregon State University. Graduate School Subject Agricultural pests

The influence on winter wheat yields of competitive weedy species

Creator:

Albeke, William Edgar

Abstract:

A study was conducted to compare the competitive ability with weeds of the short-strawed Gaines variety wheat and taller growing varieties under different fertility levels at three experimental locations. The experiments were designed so that the effects of variety, nitrogen fertilization, and weed competition could be evaluated. The interactions between...

Resource Type:

Masters Thesis
Effects of dispersion and parent population density on enclosed populations of Microtus montanus (Peale)

Creator:

Smith, Jerome Stafford

Abstract:

This field investigation was designed to further the understanding of the significant influence which parent population density, as well as dispersion, have on the dynamics of enclosed populations of the montane vole, Microtus montanus (Peale). The study was conducted in Klamath County, Oregon from June, 1963 to February, 1964. The...

Resource Type:

Masters Thesis
A study of relationships of four insects to heating in stored grain

Creator:

Eighme, Lloyd Elwyn

Abstract:

This study was conducted to determine the effects of insect infestation on areas of heating in stored grain, and to demonstrate the ability of four species of insects to initiate or promote the spread of these heating areas. The four insects used were the granary weevil Sitophilus granarius (L.), the...

Resource Type:

Dissertation