Controlling latent infections of black dot with early fungicide applications Presented by Lydia Tymon. Colletotrichum coccodes causes black dot, which can lead to reduced tuber yield and quality. Although this disease has been studied for many years, black dot continues to be a challenge to manage because the fungus can infect its hosts without causing symptoms. Chemical management tactics such as fumigation and in furrow applications have been shown to be ineffective. Applications of azoxystrobin prior to infection can significantly…

Epidemiology and integrated management of bacterial leaf spot caused by Pseudomonas syringae pv. aptata in table beet and Swiss chard seed production in the Pacific Northwest Presented by Marilen Nampijja and Stephanie Crane. Bacterial leaf spot (BLS) of beet and Swiss chard (Beta vulgaris subsp. vulgaris) is caused by the bacterial pathogen Pseudomonas syringae pv. aptata (Psa). The bacterium can cause significant economic losses in Swiss chard, table beet, and sugar beet. In 2017 alone, the incidence of BLS in…

Predicting and managing the impacts of invasive insects Presented by Patrick Tobin. Expansion of global trade and trade has facilitated the arrival and subsequent establishment of nonnative insects. Forest ecosystems are especially threatened by non-native insects due to the worldwide importance of solid wood packaging material used in global trade, the importation of lumber and wood products, and the importation of live trees for planting, all of which provide a mechanism on which an insect can 'hitchhike.' Fortunately, of the…

Please join us for an overview of thesis research projects presented by three NWREC graduate students.

Identification and biology of root weevils Presented by Ben Diehl, WSU NWREC Entomology. 12:00 - 12:30 pm Ben Diehl received a B.S. in Entomology from The Ohio State University and a M.S. in Entomology from Texas A&M University, researching the taxonomy and systematics of antlions (family Myrmeleontidae). He moved with his wife to the Skagit Valley in 2015 and has worked in the Entomology laboratory at the WSU NWREC for the past two years. He has assisted on variety of…

Know Your Herbicides: Basagran, Command, and Sandea & Know Your Weeds: Poison Hemlock and Nightshade Presented by Steven Seefeldt, WSU NWREC Weed Science. 12:00 - 1:00 pm You will need to register to receive a link to attend the seminar via Zoom.

Challenges in managing Phytophthora root rot and Verticillium wilt of red raspberry. Presented by Jerry Weiland, Research Plant Pathologist, USDA-ARS Corvallis. 12:00 - 1:00pm. Phytophthora root rot and Verticillium wilt are two soilborne diseases that can significantly reduce the health and lifespan of red raspberry. Surveys show that the pathogens causing these diseases, Phytophthora rubi and Verticillium dahliae, are widespread in the industry. However, current soil fumigation practices are only partially effective at suppressing disease. Research shows tarping increases the…