6 Feb 2017
Elimination of Tobacco Mosaic Virus From Irrigation Runoff Using Slow Sand Filtration
Oki, L.R., Lee, E., Pitton, B., Nackley, L.,(University of California (UC) Davis), Bodaghi, S., Mathews, D.M. (UC Riverside), Haver, D. (UC South Coast Research and Extension Center)
Slow sand filters have been shown to remove pythiacious organisms from captured runoff water. In this study, Tobacco Mosaic Virus (TMV) was regularly added to irrigation runoff water. The virus passed through the sand filters for approximately 5 weeks, but gradually reduced to undetectable virus titer using ELISA during week 6 to 9. This is the first report that showed slow sand filters removed TMV from runoff water.
See the article in the link below
18 Nov 2016
Slow Sand Filters: A Biological Treatment Method To Remove Plant Pathogens From Nursery Runoff
Oki, L.R., Nackley, L.L., Pitton, B. (University of California Davis)
Slow sand filters (SSF) can provide high quality water from untreated sources including irrigation runoff. A microorganism community develops on the sand and can breakdown a wide range of pollutants including plant pathogens. We studied the capacity of these filters to remove different kinds of plant pathogens from irrigation runoff. SSFs removed Phytophthora capsici after microbial establishment and after a simulated seven day pump failure in previously established SSFs. SSFs did not remove F. oxysporum after seven weeks. The SSFs were also able to remove tobacco mosaic virus from inoculated runoff water after 6 to 9 weeks of exposure.
Click on the link to view the abstract
1 Apr 2016
SCRI Integrated Management of Zoosporic Pathogens and Irrigation Water Quality for a Sustainable Green Industry
Virginia Tech, Pennsylvania State University, University of Maryland, USDA/ARS, University of California-Riverside, Rutgers University, Christopher Newport University
Results from another Specialty Crops Research Initiative project with the following objectives:
• To describe new species of Phytophthora and Pythium found in irrigation systems, assess their potential risk to the health of ornamental crops and formulate recommendations on risk avoidance and mitigation that are applicable at local and national levels
• To develop a better understanding of the dynamics of water quality in reservoirs and formulate guidelines to assist irrigation managers in mitigating the risk of nutrient deficiency and toxicity
• To develop a better understanding of the interactions occurring among water quality parameters, microbial communities, and plant pathogens in the aquatic environment
• To apply the knowledge gained in this work to develop best management practice (BMP) protocols for mitigating the dissemination of plant pathogens through irrigation systems
• To evaluate the effects that the adoption of BMPs have on production costs, revenue enhancement, and associated social and environmental benefits
• To develop an online knowledge center on waterborne plant pathogens and irrigation water quality management and use the website to deliver information and educational programs to growers, students and other scientists in order to quickly disseminate science-based knowledge and encourage the adoption of the BMPs developed through this project.