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/
15 Jul 2019
Phosphate Removal from Nursery Runoff Water Using an Iron-Based Remediation System
Francisca Ordonez Hinz, Joseph P. Albano, and P. Chris Wilson (University of Florida)
Phosphorous (P) losses from containerized plant production nurseries can be significant due to the low nutrient retention capacities of the soilless media components. Many states, including Florida, are developing or have developed more stringent rules for limiting nutrient discharges into public waterbodies to improve water quality. Effective methods are needed to reduce amounts of P in runoff and drainage water. This study investigated the use of a small scale flow-through ferrous iron (Fe(II))-based remediation system for chemically precipitating P.
Read this research article here: https://doi.org/10.3390/w11040795
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