Index Catalog // ScholarsArchive@OSU

Start Over

Filtering by: Creator Western Orchard Pest and Disease Management Conference Advisor Berry, Ralph E. Decade 1980-1989

Twospotted spider mite, Tetranychus urticae Kock, in Oregon peppermint, Mentha piperita L. : sampling, population dynamics and economic injury

Creator:

Hollingsworth, Craig Stephen

Abstract:

A pest management program for Tetranychus urticae Koch in Oregon peppermint was developed based on studies of sampling, plant phenology, population dynamics and damage thresholds. A sample size of 45 leaves provided a confidence level of 90% and a confidence interval of 50%. Estimation of the sample mean was based...

Resource Type:

Dissertation

Full Text:

pest east of the Cascade Mountains and in south-western Oregon, where hot, dry weather is conducive to
Effects of tillage on emergence of mint root borer, Fumibotys fumalis Guenée, and on other agronomic factors in peppermint, Mentha piperita L.

Creator:

Talkington, Michael Lee

Abstract:

Studies were conducted in the Willamette Valley of western Oregon to evaluate the effects of plowing (7.5-15 cm deep) and disking (5-10 cm deep) in peppermint, Mentha piperita L., on the following factors: 1) emergence of adult "mint root borer", Fumibotys fumalis Guenée; 2) suppression of common groundsel, Senecio vulgaris...

Resource Type:

Masters Thesis

Full Text:

in eastern Oregon and western Idaho. Since its discovery in Umatilla County, Oregon in 1971 (Berry