Disease Management

Aerated compost tea and other alternative treatments for disease control in pumpkins

Objectives Statement a. To investigate the effectiveness of compost tea in suppressing fungal diseases of pumpkins and promoting overall crop health and yields; to demonstrate that compost tea can be an effective tool for managing fungal diseases when used as part of an organic / non-chemical farming system. Modification: The proposal was originally written with potato as the test crop. This was changed to pumpkin to ensure disease presence. b.

Tomato Foliar Disease Control Using OMRI-Approved Materials

Seven materials approved for organic production were tested for foliar disease control on tomatoes on a certified organic farm in western New York. Four were commercial products registered for disease management on tomatoes (Plantshield, Mycostop, Trilogy, Champion WP). Three were materials thought to strengthen plant health and disease resistance through either soil or foliar application (CaCO3, SW-3, Humega). Plantshield is a formulation of the beneficial fungus Trichoderma harzianum labeled for foliar and soil drench applications.

Breeding an open-pollinated vegetable variety in organic systems: The Public Seed Initiative

The project objective is to breed a CMV resistant bell pepper using King of the North as a commercial parent. King of the North, which has been provided by Turtle Tree Seeds (located in Copake, NY), is an early, cold tolerant bell pepper variety. It is described as a superior variety for both market and home gardeners that matches or surpasses many hybrids. While seeking to add CMV resistance we do not want to compromise on quality or earliness, but rather improve on these traits that are very important to organic growers. 

Public Breeding for Organic Agriculture – Screening for Horizontal Resistance to Late Blight in Tomato

Late blight of tomato and potato, caused by the fungal pathogen Phytophthera infestans, is currently the most destructive disease of tomato (Lycopersicon esculentum) in the Pacific Northwest. Geographically this includes regions stretching from the San Francisco Bay in California to the coastal islands of British Columbia.

Organic certified seed potato production in the Midwest

Our overall goal is to support the growth of an organic certified seed potato industry in Wisconsin. We have addressed this goal by conducting field trials on participating Wisconsin organic farms in order to test organic production methods for seed potatoes that meet certification standards. We used information from our field trials and from published literature to develop educational resources for organic growers on becoming certified seed potato growers using disease testing to monitor potato health and organic management strategies to control common potato diseases.

Biological control of plant pathogens in raspberries using beneficial microorganisms, compost teas and nutritional management

From September of 1994 through June of 1995, with the financial assistance of OFRF, Organic Ag Advisors and Aptos Berry Farms conducted research on the biological, nutritional and cultural control of Botrytis and Powdery Mildew an Raspberries at the Aptos Berry Farm on Thompson Road in Watsonville CA The research took place in a raspberry operation that uses an integrated organic and conventional farming system, on a raspberry variety chosen because of it's history of trouble with these plant and fruit pathogens, These raspberries bear fruit in fall and spring, thus giving the opportunity

Phytoestrogen content of conventionally and organically grown soybeans

Soy-based foods have been the subject of recent research due to increasing evidence that soy phytoestrogens may modify the pathogenesis of some hormone-dependent and hormoneindependent diseases'. Studies have shown the isoflavones genistin and daidzin may have beneficial effects on menopausal symptoms', osteoporosis3 , and coronary heart disease 4-5. These findings have led to clinical recommendations of greater dietary intake of phytoestrogen-containing soy products.

Alternative Methods of Raspberry Production and Root Rot Control

Root rot (Phytopthora fragriae var. rubi) is of primary concern to all raspberry growers in Washington, and is of particular concern to organic growers who have fewer options for disease control. This trial is focused on organic root rot control, however all raspberry growers will benefit from new disease management strategies.

Impact of Disease Suppressive Composts on Organic Vegetable Quality Composition and Yield

The goal of this research was to initiate studies on compost effects on severity of common soil borne diseases and to characterize changes plant growth due to improved nutrient availability and soil microbial activity with compost application in organic production systems. 

Project Objectives

-Analyze several animal manure-based, organic-approved compost products for suppression of important soil-borne pathogens of vegetable crops in the Northeast

-Determine applicability of a farmer-based test kit for assessment of compost maturity to predict suppressiveness

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