Disease and related disorder management

Report to the Oregon Processed Vegetable Commission

Cynthia M. Ocamb
Ext. Specialist and Assistant Professor Botany and Plant Pathology, OSU

Nathan Miller
Graduate Student, OSU, Corvallis

Tim Knight
Faculty Research Assistant, BPP, OSU

Dan McGrath
Linn County, Regional Ag. Agent - Marion County

Jim Myers
OSU Dept of Horticulture

Ed Peachy
OSU Dept of Horticulture

Mary Powelson
OSU Dept of Botany and Plant Pathology

Alex Stone
OSU Dept of Horticulture

Pscheidt, J. and C. Ocamb (eds.) 2012. Pacific Northwest Plant Disease Management Handbook. Available online at http://pnwhandbooks.org/plantdisease/ (verified 25 April, 2012).

To order a print copy of  the handbook, see http://pnwhandbooks.org/plantdisease/order-handbook

Describes the causes and disease cycle of sweet corn root rot diseases, including the infection process and symptom development. Color photos illustrate symptoms at various stages of plant growth. Explains how to evaluate a field's risk for root rot development.
Beth Hoinacki, Department of Botany and Plant Pathology, Oregon State University
Funding for this research was provided by the Oregon Processed Vegetable Commission
OSU Extension Series # EM 8859

Length: 4 pages

Introduction

The purpose of this trial was to evaluate the effectiveness of various fungicides and kelp in controlling anthracnose (Colletotrichum cereale) on annual bluegrass putting greens.

* Growing globe artichokes from seed in western Oregon
* Strip and conventional tillage compared on bush beans and sweet corn
* Irrigation, nitrogen, and spacing affect bush bean yields
* Cultural practices affect corn head smut in 1982

Report to the Oregon Processed Vegetable Commission

George Clough and Philip Hamm
OSU Hermiston Agricultrual Research and Extension Center

Cooperators: Brian Yorgey, OSU Department of Food Science & Technology, Wiegand Hall, Corvallis, OR 97331; Nick David and Stacy Gieck, Oregon State University, Hermiston; Friehe Farms, Moses Lake, WA; Ron Riemann Farms, Pasco, WA; Mark Trent, WSU Extension, Ephrata, WA.

Objective 1: Evaluation of commercial sweet corn varieties and inbred germplasm in small plots for susceptibility to seed rot/damping-off as well as root, stalk, and crown rot.

Objective 2: Evaluation of microbial and chemical treatments for suppression of sweet corn seed rot/damping-off, root rot, and crown rot.

Objective 3: Cooperate with other sweet corn projects (cultivar screenings, irrigation studies, etc.) within and outside of OSU programs.

Cancellation of the registration of an effective bean mold fungicide, Ronilan, occurred at the end of the 2005 growing season. Finding equivalent alternatives for use in snap bean is critical. The goal of the project is to continue evaluations of alternative fungicides for their effectiveness in controlling white mold (Sclerotinia sclerotiorum) and gray mold (Botrytis cinerea) on snap bean.

Objective: to evaluate the impacts of N availability, microbial activity, and root health on corn productivity and yield in high biomass cover crop systems.

Three trials at two locations were conducted to evaluate sweet corn hybrids for performance under root rot conditions. While both sugar/se and supersweet sweet corn hybrids were evaluated, the emphasis was again on identifying supersweet hybrids with improved tolerance to root rot.