7 Jun 2017
First Report of Pythium aphanidermatum Causing Root Rot and Decline of Poinsettia in Maryland
Del Castillo Múnera, J. (University of Maryland) and C.L. Swett (University of California, Davis)
The publication is one of the outcomes from the statewide monitoring of water-borne oomycetes to provide critical control point assessment to nursery producers. Pythium aphanidermatum was isolated from poinsettia exhibiting root rot symptoms. Healthy poinsettia were inoculated in a greenhouse experiment with isolates recovered from the root rot resulted in wilting and root rot symptoms. P. aphanidermatum was recovered, confirming that it is a poinsettia pathogen in Maryland. This new information enables regional diagnosticians and crop advisors to provide more accurate information to producers, and facilitates research efforts to improve root disease management.
See the link bellow
26 May 2017
Next Generation Sequencing of Oomycete Communities in Nursery Irrigation Water
Eberhart, J., Funahashi, F., Foster, Z.S.L., Parke, J. (Oregon State University)
Our current research is focused on helping plant nurseries monitor oomycete pathogens in their irrigation water to determine the need for water treatment, evaluate effectiveness of treatment options, and enable selection of cost-effective ways to disinfest water. Once protocols have been fully developed and validated, Illumina sequencing has the potential to be a sensitive method to detect, identify, and estimate the relative abundance of oomycete communities from water samples. We will use this knowledge to help nursery managers make informed decisions about effective water disinfestation strategies, reducing the risk of establishment of plant pathogens.
Sudden Oak Death 6th Science Symposium June 2016 (2554 KB)
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