Nursery plants are plagued by hidden aquatic mold, and plant pathologists have a solution
Many nursery plants around the world are ravaged by the aquatic root-destroying Phytophthora molds. These pathogens can hide for months or even years undetected, in part through the use of chemicals that suppress symptoms but do not eliminate infection. As a result, many infected plants are sold. After planting, these plants can survive for several months, but grow poorly and eventually die from root rot. During this time, aquatic mold can permanently infest the planting site and infect adjacent plants, causing an area of plant death spread.
“Starting in 2014, we and other researchers showed that many species of Phytophthora were present in nursery stock used for habitat restoration, inadvertently introducing these serious pathogens into native habitats,” said said Ted Swiecki, a plant pathologist who wrote about this in a recent article. article published. “It was effectively degrading rather than restoring habitats. Through awareness raising and education, Swiecki and other plant pathologists were able to educate those involved in these restoration projects about this problem and started a joint task force to determine what to do.
“A key part of the solution was being able to reliably produce nursery stock free from Phytophthora, a particularly damaging group of aquatic molds,” explained Swiecki. “Because nurseries are so favorable to Phytophthora, the complete exclusion of these pathogens from soil and water is necessary to consistently produce Phytophthora-free stocks. “
Swiecki and colleagues have developed a set of best nursery phytophthora management practices (NPBMP), designed to eradicate phytophthora by starting clean and staying clean. These practices include a sensitive protocol that tests groups of plants for even low levels of infection. They also launched a clean nursery accreditation program to help nurseries comply with NPNMPs.
“Through extensive testing, we have verified that nurseries that fully comply with NPBMPs do not have detectable Phytophthora in their stock,” said Swiecki. “The agencies that helped fund this program and others were able to use clean nursery stock from accredited nurseries for habitat restoration plantations.”
Scientists accidentally discover new aquatic mold threatening Christmas trees
Tedmund J. Swiecki et al, An accreditation program to produce native plant nursery stock free of Phytophthora for use in habitat restoration, Plant health progress (2021). DOI: 10.1094 / PHP-02-21-0025-FI
Provided by the American Society of Plant Pathology
Quote: Nursery plants are plagued by hidden aquatic mold, and plant pathologists have a solution (2021, November 4) retrieved November 4, 2021 from https://phys.org/news/2021-11-nursery-plagued- hidden-mold- pathologistes.html
This document is subject to copyright. Other than fair use for private study or research purposes, no part may be reproduced without written permission. The content is provided for information only.