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Organic Fertilization Association of California Webinar

December 1, 2022 @ 9:00 am - 12:00 pm



9:00 AM – 9:50 AM

Utility of compost teas and organic fungicides for control of powdery mildew in grapes.

Annemiek Schilder, PhD; Director, UCCE Ventura County/Hansen Agricultural REC

The presentation will cover disease diagnosis by typical symptoms and signs, and the life cycle and epidemiology of powdery mildew, the most widespread disease of grapes worldwide. Control methods discussed will emphasize an integrated approach to disease management, focusing on canopy management, fungicide application timing, improving spray coverage, dormant sprays, efficacy of compost teas, biological control products and other organic fungicides, and risk of phytotoxicity of some products.

9:50 AM – 10:20 AM

Cover Cropping and Weed Management: Considerations

Sarah Light, UCCE – Agronomy Advisor – Sutter, Yuba, and Colusa Counties

This talk will focus on cover crops and their impact on weed management including weed counts, potential herbicide savings from reduced application, and considerations when implementing cover crops. Talk will share results from multiple sites and years in the Sacramento Valley and will discuss the impact of cover crop variety, and weather, on weed pressure.

10:20 AM – 10:50 AM

Walnut Husk Fly IPM

Sudan Gyawaly, UCCE – IPM Advisor

This presentation will cover the biology of the Walnut Husk Fly. Sudan will explain how to monitor the pest and also discuss the considerations of how to manage the Walnut Husk Fly.

10:50 AM – 11:20 AM

Feeding the soil food web through applications of compost, compost tea, and raw olive pomace

Amanda Hodson, UCCE – Assistant Professional Researcher, Department of Entomology and Nematology

Organic amendments can increase soil organic matter and stimulate biologically based nutrient cycling by feeding the soil food web. This presentation will detail the results of field trials in olives evaluating the effects of compost, compost tea and olive pomace on soil food webs, carbon pools and yield.

11:20 AM – 11:50 AM

Virus diseases in vineyards and new technology to deal with them

Luca Brillante, Ph.D., CSU, Fresno Assistant Professor

The presentation will include general information and management about leafroll, fan leaf and redblotch viruses in grapevine. The presentation will also include new experimental solutions and results on the use of hyperspectral machine vision to assist roguing.


December 1, 2022
9:00 am - 12:00 pm




Organic Fertilizer Association of California
View Organizer Website


Event Type
Courses, Trainings, and Workshops