Grapevine Trunk Diseases (GTDs) Management for Conventional and Organic production
Project Summary
Project objectives
- Compare the efficacy of fungicides and sealants in protecting pruning wounds
- Test the effect of pruning time and subsequent wound protection length of both
conventional and organic registered fungicides
Importance to the Oregon wine community:
Grapevine trunk disease (GTD) is a disease complex that consists of the largest group of fungal pathogens causing disease and progressive vine decline. While several kinds of GTDs are present in Oregon vineyards, Botryosphaeriaceae spp. are most commonly present in both Willamette and Rogue Valley vineyards.
Grapevine trunk diseases are often considered an “old vine” disease; however, there is evidence of vines being infected at an early stage. In our previous study, we detected 2 Botryosphaeriaceae spp. from vineyards aged two years to 40 years old. It is important for growers of newly planted vineyards to stay informed about the GTDs situation in nearby vineyards. Baumgartner et al. (2019) showed adoption of preventative measures at early stages of vine development is cost-effective as compared to the adoption of this practice at later stages.
Progress Reports
2022-23: Year 1 Update
In the fiscal year 2022-2023, the OWB committed $359,409 to seven highly ranked viticulture and enology projects that were reviewed and recommended to OWB by its Research Committee comprised of volunteers from across the state.
Principal Investigator
Dr. Achala KC is an assistant professor of plant pathology in the Department of Botany and Plant Pathology at Oregon State University, specializing in tree fruit and wine grape pathology. She has prepared the update below.
Her co-investigator on this project is Dr. Jay Pscheidt, professor in the Department of Botany and Plant Pathology at OSU.
