The nng nematode, Cnconenwlla xenoplax, has been reported to depress the vigor and yields of grapevines in Europe, California, Washington, and Michigan. Population densities of 500 C. xenoplax per kg of soil have reported to reduce vine yield 10-25% in California. A survey of Oregon vineyards found C. xenoplax in...
The Purpose of the Study
The central purpose of this study was to determine the professional
education competencies of selected community college vocational
instructors. Respondents in the study included instructors of business
and distributive education. Major dimensions were the construction
and validation of a questionnaire for community college vocational
instructors;...
Grafted grapevines will become increasingly important in Oregon vineyards in order to prevent loss of plants to phylloxera infestations. Several rootstocks are now being evaluated in Oregon for horticultural traits and characteristics related to wine quality. Resistance or tolerance to other plant diseases affecting grapevines needs to be examined as...