Disease and related disorder management

Report to the Oregon Processed Vegetable Commission

Jim Meyers
OSU Dept of Horticulture

Brian Yorgey
OSU Dept of Food Science and Technology

Objectives:

1. Test various inbred combinations for hybrid production, and evaluate commercial cultivars for adaptation to Oregon growing conditions and for head rot resistance.

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 (biofungicides) 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, 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.

Report to the Oregon Processed Vegetable Commission

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

Cooperators: Nick David and Stacy Gieck, OSU, HAREC; Watts Brothers, Inc.

Objectives:

1. Twenty-nine sweet corn cultivars were evaluated for resistance to natural infection by common smut

Objective: Identify sweet corn hybrids released for the processing market for high and stable yields under heavy and light root rot pressure.

Objectives: 1. Breed Bush Blue Lake green bean varieties with high economic yield and improved plant architecture. 2. Improve pod characteristics including straightness, color, smoothness, texture, flavor and quality retention, and combine with delayed seed size development. 3. Incorporate white mold resistance and improve root rot tolerance. 4. Map genes for resistance to white mold to facilitate marker aided selection.

Report to the Oregon Processed Vegetable Commission

Jim Meyers
OSU Dept of Horticulture

Brian Yorgey
OSU Dept of Food Science and Technology

Objectives: 

1. Test various inbred combinations for hybrid production, and evaluating commercial cultivars for adaptation to Oregon growing conditions and for head rot resistance

Objective 1: Evaluate commercial sweet corn varieties and inbred germplasm in small plots for susceptibility to root rot, stalk node rot, and crown rot. Objective 2: Examine the relationship between Western Spotted Cucumber Beetle reproduction and seed microbial communities.

Report to the Oregon Processed Vegetable Commission

Cindy Ocamb
OSU Dept of Botany and Plant Pathology

Nathan Miller
Postdoctoral Research Assistant, BPP, OSU

David H. Gent
USDA-ARS, Corvallis

Robert B. McReynolds
OSU North Willamette Research & Ext. Center

Objective:

1. Determine whether ascospores of S. sclerotiorum can be detected in experimental bean plantings by polymerase chain reaction (PCR).

Report to the Oregon Processed Vegetable Commission

Alex Stone
OSU Dept. of Horticulture

Ken Johnson
OSU Dept. of Botany and Plant Pathology

Objectives:

1. To determine the impact of fall Contans applications on Coniothyrium minitans (Cm) infection and survival of sclerotia left on the soil surface through the winter and summer
2. To determine the impact of summer irrigation and burial on sclerotial survival and infection with Cm and other fungi