29 Jul 2019
Testing the Water
Neelam R. Redekar and Jennifer L. Parke (Oregon State University)
We describe a simple method that growers can use to test their irrigation water for Phytophthora. Rhododendron leaves or pear fruits are used to bait Phytophthora from the water source. If brown spots develop on the baits, detection of Phytophthora may be confirmed by using an inexpensive diagnostic test kit. We provide links to short videos on how to bait and how to use the test kits.
Read the article here http://www.diggermagazine.com/testing-the-waters/
25 Jun 2019
Diversity of Phytophthora, Pythium, and Phytopythium Species in Recycled Irrigation Water in a Container Nursery
Neelam R. Redekar, Joyce L. Eberhart, and Jennifer L. Parke (Oregon State University)
Plant nurseries may irrigate with surface or recycled water that is contaminated with plant pathogens. At an Oregon nursery we filtered or baited irrigation water, followed by next generation DNA sequencing, to identify multiple oomycete pathogens occurring together. Baits were more effective than filters at capturing pathogenic species. Pathogens were more abundant in recycled water than in the source water, but chlorination was effective at killing them. Pythium and Phytopythium species were prominent in summer, whereas Phytophthora species were observed year-round. Growers should regularly test irrigation water for pathogens and disinfest water before use in irrigation.
Read the article here: https://doi.org/10.1094/PBIOMES-10-18-0043-R
26 Apr 2018
Test Your Irrigation Water for Phytophthora
Redekar, N.R. and Parke, J.L. (Oregon State University)
Phytophthora is a plant pathogen that can infect a wide variety of nursery plant species, and it spreads in irrigation water. In this article, we will describe how you can test your irrigation water for Phytophthora using baits. We present a case study of a large nursery where baiting was used to test the efficacy of their water treatment. Although this nursery recycles 90% of their irrigation water, we showed that they were successful at controlling Phytophthora contamination with their chlorination treatments.
Haga clic aquí para leer el artículo en español.
American Nurseryman Redekar and Parke 2018 (657 KB)