Presented by Dr. Jeremiah Dung, Assistant Professor in the Department of Botany and Plant Pathology at the Oregon State University Central Oregon Research and Extension Center, Madras, OR. White rot is an extremely destructive and economically important disease of Allium crops, especially garlic and onion. The soilborne fungus that causes white rot can lay dormant in soils for decades and germinates in response to the presence of Alliums. Join Dr. Dung as he discusses the biology of the pathogen, the…

Pesticides and Honey Bees Presented by Tim Lawrence. Pesticides and honey bees are both essential to ensure an adequate supply of affordable food crops. This presentation will cover: the history of pesticides and pollination services provided by honey bees; the evolution of pesticides and their impact on honey bees; issues and concerns related to neonicotinoid pesticides; and steps pesticide applicators and growers can take in mitigating the effects of pesticides on honey bees and other pollinators. Seed Crop Pests: Biology…

Know your herbicides: Clopyralid and aminopyralid Presented by Steven Seefeldt. Two related herbicides with interesting properties. Learn how and when to use them as part of an integrated management plan. https://youtu.be/F51zjPBmL2g Soil-biodegradable plastic mulch provides weed control Presented by Carol Miles. Soil-biodegradable plastic mulch can be an effective tool for controlling weeds. This presentation will provide an introduction to soil-biodegradable mulch, an overview of how effective weed control can be, and impact on crop yield compared to polyethylene mulch in…

Forest Pathology—Diseases in Washington State and their Management Presented by Bob Edmonds. Forest diseases, mostly caused by fungi, are important components of natural forest ecosystems in Washington, causing tree mortality, producing snags and creating habitats for plants and animals, influencing forest succession, and recycling carbon and nutrients. Forest pathogens, fires and insects commonly act together. However, in managed forests they influence forest health, cause site degradation, kill planted trees, and cause economic losses. I will briefly describe the main diseases…

Fungicides 101: Making the Most of Your Conventional or Organic Fungicide Programs Presented by Lindsey du Toit. Whether you grow crops conventionally or organically, are you getting the most out of your fungicide programs? If your crop has a root disease, will you get any benefit from applying a fungicide to the plants or to the soil? When should you make your application(s)? How often? What method of fungicide application will give you the best control of the diseases you…

Preplant to replant: Fumigation in red raspberry Presented by Lisa DeVetter. Fumigation is a widely implemented practice to manage soil borne diseases and parasitic nematodes in the Washington red raspberry system. This presentation will provide an overview of fumigation in the raspberry system and research done to improve management of key soil borne pathogens with an emphasis on pre-plant management decisions. Fungicide resistance and proper rotation Presented by Anthony Keinath. Discussion of fungicide active ingredients by FRAC Code and managing…